[kcits_gxp]

I have a 2007 gxp. I bought it brand new back in '07 so I am the only owner of this car. A week ago I noticed it was idling VERY rough. I mean the whole car would lurch side to side like it was an old muscle car with a full cam. I got out, opened the hood and started looking around for something obvious and found the fitting for the pcv valve was broke off the intake pipe. Figuring this was the problem, and the fact that it still rode OK at highway speeds, I drove it home and parked it. I came on this forum looking for a solution and found several recommendations for the DDM Works silicone intake tube, so I ordered one. I just installed it and it seems to be a little better, but it still has a very noticeable "shudder". Do I still have a leak a where the pcv valve attaches or is it possibly another problem altogether? Thanks!

 

[DaveOC]

I came on this forum looking for a solution and found several recommendations for the DDM Works silicone intake tube, so I ordered one. I just installed it and it seems to be a little better, but it still has a very noticeable "shudder". Do I still have a leak a where the pcv valve attaches or is it possibly another problem altogether? Thanks!

I have never been aware of the broken PCV connection to cause any "shuddering" or rough idle. I think you may have another problem, though what it may be, I do not know.

Have you gotten a check engine light?

.

 

[kcits_gxp]

Yes, the light is on, and no I haven't had it read. I just assumed the problem was the pcv valve. Advance or AutoZone can read that code for me, correct? Are there any specific codes to look out for. I just noticed on a couple other threads talk about injectors and carbon build up, I guess what I'm asking is this: is there a list of codes and most likely causes or each code?

 

[DaveOC]

I'm not aware of any list of probable codes, but that doesn't mean that such a list doesn't exist.

Go to an Advance Auto and get the codes read, post them here and there are plenty of guys here who can tell you what the problem most likely is.

 

[llllfly]

Go get the code and post.
Over 100+ codes.
LLLFLY

 

[kcits_gxp]

Thanks guys, I'll get them read and come back. Duh! I didn't even think of that until I hit the post button. Just frustrated. Had my baby nearly 7 years with no major problems and now I've been without her a week and I'm getting antsy! Thanks again.

 

[KappaKadet]

Good luck !

Didn't happen to put any [email protected] gas in it lately? Was tempted to get some cheap at a Walmart recently; but resisted went on down the road a Chevron.

 

[The_Ghost]

There is a list of codes....but not on this forum. GM would have a canary!! There are some 200+ codes for our cars....very specific at that. Get the code, and post it here again, there are many people here that can point you in the right direction to fix it....

 

[The_Ghost]

Didn't happen to put any [email protected] gas in it lately? Was tempted to get some cheap at a Walmart recently; but resisted went on down the road a Chevron.

DON'T EVER BUY GAS CHEAPLY for premium!! I just bought some at the local national chain gas station and he must be selling 89 as 93!!! Car back fired and burped like crazy till I got some good stuff.

 

[brap]

I realize its all speculation until we get some mils, but If your pcv was broken it could have been pulling unmetered air which could cause an issue like rough idle. If it got better great. Also its been 7 years, clean the maf if you haven't. If I am not mistaken the KN filter can skew readings and dirty the maf. Also are your plugs original? GM replaced those plugs with a hotter plug. 41-102 to 41-108. There are threads around with lnf owners stating idle was improved when switching to the hotter plug. Just a couple simple/inexpensive things to consider.

 

[kcits_gxp]

OK, got the codes P0 017 came up twice and P0 011 once. And yeah brap, they are the original plugs, i should probably change them. And I was concerned that unfiltered air could have messed up something.

 

[The_Ghost]

Ahhh....the camshaft position actuators....

P0017 is the exhaust camshaft position correlation
P0011: Intake Camshaft Position (CMP) System Performance

 

[brap]

If you're handyman, you can replace this solenoid yourself. Order the solenoid from your local gm dealer or worthy online retailer(~$70), take off your engine cover and grab a 10mm socket and replace your intake cam actuator. On top of your engine from the same harness as your spark plugs, there are 2 more wire sets running to the int/exh actuators. The int is on the driverside toward the engine front. There is 1 10mm bolt holding it in place, but it may be hard to pull out so give it a slight twist/pull and it'll pop out, then just reconnect your harness. Change your oil, if you are due, replace that actuator(10 min tops) and clear the codes. Interesting thing is, your car may run like crap til your codes are cleared. I went through this on a 2.4l vvt ecotec(le5) and I could clear the code with the engine running and it would run better immediately, but it would come back within a key cycle. After replacing the solenoid it was solved for good. GL

 

[kcits_gxp]

Is that ~$70 each, there are two correct? One intake and one exhaust?

 

[1 LIL NDN]

kcits gxpHere is the list of cell codes



P0010 Intake Camshaft Position Actuator Solenoid Control Circuit
P0011 Intake Camshaft Position System Performance
P0013 Exhaust Camshaft Position Actuator Solenoid Control Circuit
P0014 Exhaust Camshaft Position System Performance
P0016 Crankshaft Position-Intake Camshaft Position Correlation
P0017 Crankshaft Position-Exhaust Camshaft Position Correlation
P0030 HO2S Heater Control Circuit Sensor 1
P0031 HO2S Heater Control Circuit Low Voltage Sensor 1
P0032 HO2S Heater Control Circuit High Voltage Sensor 1
P0033 Turbocharger Bypass Valve Solenoid Control Circuit
P0034 Turbocharger Bypass Valve Solenoid Control Circuit Low Voltage
P0035 Turbocharger Bypass Valve Solenoid Control Circuit High Voltage
P0036 HO2S Heater Control Circuit Sensor 2
P0037 HO2S Heater Control Circuit Low Voltage Sensor 2
P0038 HO2S Heater Control Circuit High Voltage Sensor 2
P0053 HO2S Heater Resistance Sensor 1
P0054 HO2S Heater Resistance Sensor 2
P0068 Throttle Body Airflow Performance
P0087 Fuel Rail Pressure Too Low
P0088 Fuel Rail Pressure Too High
P0089 Fuel Pressure Regulator Performance
P0090 Fuel Pressure Regulator Control Circuit
P0091 Fuel Pressure Regulator Solenoid 1 Control Circuit Low Voltage
P0092 Fuel Pressure Regulator Solenoid 1 Control Circuit High Voltage
P0096 Intake Air Temperature Sensor 2 Performance
P0097 Intake Air Temperature Sensor 2 Circuit Low Voltage
P0098 Intake Air Temperature Sensor 2 Circuit High Voltage
P0099 Intake Air Temperature Sensor 2 Circuit Intermittent
P0100 Mass Air Flow Sensor Circuit
P0101 Mass Air Flow Sensor Performance
P0102 Mass Air Flow Sensor Circuit Low Frequency
P0103 Mass Air Flow Sensor Circuit High Frequency
P0106 Manifold Absolute Pressure Sensor Performance
P0107 Manifold Absolute Pressure Sensor Circuit Low Voltage
P0108 Manifold Absolute Pressure Sensor Circuit High Voltage
P0112 Intake Air Temperature Sensor Circuit Low Voltage
P0113 Intake Air Temperature Sensor Circuit High Voltage
P0114 Intake Air Temperature Sensor Circuit Intermittent
P0115 Engine Coolant Temperature Sensor Circuit
P0116 Engine Coolant Temperature Sensor Performance.
P0117 Engine Coolant Temperature Sensor Circuit Low Voltage
P0118 Engine Coolant Temperature Sensor Circuit High Voltage
P0119 Engine Coolant Temperature Sensor Circuit Intermittent
P0120 Throttle Position Sensor Circuit
P0121 Throttle Position Sensor Performance
P0122 Throttle Position Sensor 1 Circuit Low Voltage
P0123 Throttle Position Sensor 1 Circuit High Voltage
P0125 Engine Coolant Temperature Insufficient For Closed Loop Fuel Control
P0128 Engine Coolant Temperature Below Thermostat Regulating Temperature
P0130 HO2S Circuit Closed Loop Performance Sensor 1
P0131 HO2S Circuit Low Voltage Sensor 1
P0132 HO2S Circuit High Voltage Sensor 1
P0133 HO2S Slow Response Sensor 1
P0134 HO2S Circuit Insufficient Activity Sensor 1
P0135 HO2S Heater Performance Sensor 1
P0137 HO2S Circuit Low Voltage Sensor 2
P0138 HO2S Circuit High Voltage Sensor 2
P0139 HO2S Slow Response Sensor 2
P0140 HO2S Circuit Insufficient Activity Sensor 2
P0141 HO2S Heater Performance Sensor 2
P0171 Fuel Trim System Lean
P0172 Fuel Trim System Rich
P0192 Fuel Rail Pressure Sensor Circuit Low Voltage
P0193 Fuel Rail Pressure Sensor Circuit High Voltage
P0201 Injector 1 Control Circuit
P0202 Injector 2 Control Circuit
P0203 Injector 3 Control Circuit
P0204 Injector 4 Control Circuit
P0218 Transmission Fluid Overtemperature
P0220 Throttle Position Sensor 2 Circuit
P0221 Throttle Position Sensor 2 Performance
P0222 Throttle Position Sensor 2 Circuit Low Voltage
P0223 Throttle Position Sensor 2 Circuit High Voltage
P0230 Fuel Pump Relay Control Circuit
P0234 Turbocharger Engine Overboost
P0236 Turbocharger Boost System Performance
P0237 Turbocharger Boost Sensor Circuit Low Voltage
P0238 Turbocharger Boost Sensor Circuit High Voltage
P0243 Turbocharger Wastegate Solenoid Control Circuit
P0245 Turbocharger Wastegate Solenoid Control Circuit Low Voltage
P0246 Turbocharger Wastegate Solenoid Control Circuit High Voltage
P0261 Injector 1 Control Circuit Low Voltage
P0262 Injector 1 Control Circuit High Voltage
P0264 Injector 2 Control Circuit Low Voltage
P0265 Injector 2 Control Circuit High Voltage
P0267 Injector 3 Control Circuit Low Voltage
P0268 Injector 3 Control Circuit High Voltage
P0270 Injector 4 Control Circuit Low Voltage
P0271 Injector 4 Control Circuit High Voltage
P0299 Turbocharger Engine Underboost
P0300 Engine Misfire Detected
P0301 Cylinder 1 Misfire Detected
P0302 Cylinder 2 Misfire Detected
P0303 Cylinder 3 Misfire Detected
P0304 Cylinder 4 Misfire Detected
P0315 Crankshaft Position System Variation Not Learned
P0324 Knock Sensor Module Performance
P0325 Knock Sensor Circuit
P0326 Knock Sensor 1 Performance
P0327 Knock Sensor 1 Circuit Low Voltage
P0328 Knock Sensor 1 Circuit High Voltage
P0331 Knock Sensor 2 Performance
P0332 Knock Sensor 2 Circuit Low Voltage
P0333 Knock Sensor 2 Circuit High Voltage
P0335 Crankshaft Position Sensor Circuit
DTC P0335 or P0336 for the 2.4L engine
P0336 Crankshaft Position Sensor Performance
P0338 Crankshaft Position Sensor Circuit High Duty Cycle
P0340 Intake Camshaft Position Sensor Circuit
P0341 Intake Camshaft Position Sensor Performance
P0342 Intake Camshaft Position Sensor Circuit low voltage
P0343 Intake Camshaft Position Sensor Circuit low voltage
P0351 Ignition Coil 1 Control Circuit
P0352 Ignition Coil 2 Control Circuit
P0353 Ignition Coil 3 Control Circuit
P0354 Ignition Coil 4 Control Circuit
P0365 Exhaust Camshaft Position Sensor Circuit
P0366 Exhaust Camshaft Position Sensor Performance
P0367 Exhaust Camshaft Position Sensor Circuit Low Voltage
P0368 Exhaust Camshaft Position Sensor Circuit High Voltage
P0420 Catalyst System Low Efficiency
P0442 Evaporative Emissions System Small Leak Detected
P0443 Evaporative Emission Purge Solenoid Control Circuit
P0446 Evaporative Emissions Vent System Performance
P0449 Evaporative Emission Vent Solenoid Control Circuit
P0451 Fuel Tank Pressure Sensor Performance
P0452 Fuel Tank Pressure Sensor Circuit Low Voltage
P0453 Fuel Tank Pressure Sensor Circuit High Voltage
P0454 Fuel Tank Pressure Sensor Intermittent
P0455 Evaporative Emission System Large Leak
P0458 Evaporative Emission Purge Solenoid Control Circuit Low Voltage
P0459 Evaporative Emission Purge Solenoid Control Circuit High Voltage
P0461 Fuel Level Sensor Circuit Performance
P0462 Fuel Level Sensor Circuit Low Voltage
P0463 Fuel Level Sensor Circuit High Voltage
P0480 Cooling Fan Relay 1 Control Circuit
P0481 Cooling Fan Relay 2 Control Circuit
P0496 Evaporative Emission System Flow During Non-Purge
P0498 Evaporative Emission Vent Solenoid Control Circuit Low Voltage
P0499 Evaporative Emission Vent Solenoid Control Circuit High Voltage
P0500 Vehicle Speed Sensor Circuit
P0502 Vehicle Speed Sensor Circuit Low Voltage
P0503 Vehicle Speed Sensor Circuit Intermittent
P0506 Idle Speed Low
P0507 Idle Speed High
P050A Cold Start Idle Air Control System Performance
P0520 Engine Oil Pressure Sensor Circuit
P0532 Air Conditioning Refrigerant Pressure Sensor Circuit Low Voltage
P0533 Air Conditioning Refrigerant Pressure Sensor Circuit High Voltage
P0556 Brake Booster Pressure Sensor Performance
P0557 Brake Booster Pressure Sensor Circuit Low Voltage
P0558 Brake Booster Pressure Sensor Circuit High Voltage
P0560 System Voltage
P0562 System Voltage Low TCM
P0563 System Voltage High TCM
P0571 Cruise Control Brake Switch Circuit
P0572 Brake Switch Circuit 1 Low Voltage
P0573 Brake Switch Circuit 1 High Voltage
P0575 Cruise Control Switch Signal Circuit
P0601 Control Module Read Only Memory Transmission Control Module Read Only Memory
P0602 Control Module Not Programmed Transmission Control Module Not Programmed
P0603 Control Module Long Term Memory Reset Transmission Control Module Long Term Memory Reset
P0604 Control Module Random Access Memory Transmission Control Module Random Access Memory
P0606 Control Module Internal Performance
P0607 Control Module Performance
P060D Control Module Accelerator Pedal Position System Performance
P0615 Starter Relay Control Circuit
P0616 Starter Relay Control Circuit Low Voltage
P0617 Starter Relay Control Circuit High Voltage
P0621 Generator L-Terminal Circuit
P0622 Generator F-Terminal Circuit
P0626 Generator F-Terminal Circuit High Voltage
P0627 Fuel Pump Relay Control Circuit
P0628 Fuel Pump Relay Control Circuit Low Voltage
P0629 Fuel Pump Relay Control Circuit High Voltage
P062B Control Module Fuel Injector Control Performance
P062F Control Module Long Term Memory Performance Transmission Control Module Long Term Memory Performance
P0638 Throttle Actuator Control Command Performance
P0641 5-Volt Reference 1 Circuit
P0642 5-Volt Reference 1 Low Voltage
P0643 5-Volt Reference 1 High Voltage
P0645 Air Conditioning Clutch Relay Control Circuit.
P0650 Malfunction Indicator Lamp Control Circuit
P0651 5-Volt Reference 2 Circuit
P0652 5-Volt Reference 2 Low Voltage
P0653 5-Volt Reference 2 High Voltage
P0685 Engine Controls Ignition Relay Control Circuit
P0686 Engine Controls Ignition Relay Control Circuit Low Voltage
P0687 Engine Controls Ignition Relay Control Circuit High Voltage
P0689 Engine Controls Ignition Relay Feedback Circuit Low Voltage
P0690 Engine Controls Ignition Relay Feedback Circuit High Voltage
P0691 Cooling Fan Speed Output Circuit Low Voltage
P0692 Cooling Fan Speed Output Circuit High Voltage
P0697 5-Volt Reference 3 Circuit
P0698 5-Volt Reference 3 Low Voltage
P0699 5-Volt Reference 3 High Voltage
P0700 Transmission Control Module Requested MIL Illumination
P0703 Brake Switch Circuit 2
P0711 Transmission Fluid Temperature Sensor Performance
P0712 Transmission Fluid Temperature Sensor Circuit Low Voltage
P0713 Transmission Fluid Temperature Sensor Circuit High Voltage
P0716 Input Speed Sensor Performance
P0717 Input Speed Sensor Circuit Low Voltage
P0722 Output Speed Sensor Circuit Low Voltage
P0723 Output Speed Sensor Circuit Intermittent
P0727 Engine Speed No Signal
P0741 Torque Converter Clutch System - Stuck Off
P0742 Torque Converter Clutch System - Stuck On
P0748 Pressure Control Solenoid Control Circuit
P0751 1-2 Shift Solenoid Valve Performance - No First, Fourth or Fifth Gear
P0752 1-2 Shift Solenoid Valve Performance - No Second or Third Gear
P0756 2-3 Shift Solenoid Valve Performance - No First or Second Gear
P0757 2-3 Shift Solenoid Valve Performance - No Third, Fourth or Fifth Gear
P0761 4-5 Shift Solenoid Valve Performance - No Fourth Gear
P0762 4-5 Shift Solenoid Valve Performance - No Fifth Gear
P0833 Clutch Pedal Switch 2 Circuit

 

[1 LIL NDN]

kcis gxpthis is the rest of them

P0850 Park/Neutral Position Switch Circuit
P0973 1-2 Shift Solenoid Control Circuit Low Voltage
P0974 1-2 Shift Solenoid Control Circuit High Voltage
P0976 2-3 Shift Solenoid Control Circuit Low Voltage
P0977 2-3 Shift Solenoid Control Circuit High Voltage
P0979 4-5 Shift Solenoid Control Circuit Low Voltage
P0980 4-5 Shift Solenoid Control Circuit High Voltage
P1011 Intake Camshaft Position Actuator Park Position Circuit
P1012 Intake Camshaft Position Actuator Park Position Circuit
P1101 Intake Air Flow System Performance
P1133 HO2S Insufficient Switching Sensor 1
P1174 Fuel Trim Cylinder Balance
P1400 Cold Start Emission Reduction Control System
P1516 Throttle Actuator Control Module Throttle Actuator Position Performance
P1551 Throttle Valve Rest Position Not Reached During Learn
P1629 Theft Deterrent Fuel Enable Signal Not Received
P1631 Theft Deterrent Fuel Enable Signal Not Correct
P1632 Theft Deterrent Start Disable Signal Received
P167A Control Module HO2S 1 System Performance
P167D Control Module Ignition Coil Internal Circuit
P1682 Ignition 1 Switch Circuit 2
P1793 Wheel Speed Signal
P1820 Internal Mode Switch A Circuit Low Voltage
P1822 Internal Mode Switch B Circuit High Voltage
P1823 Internal Mode Switch P Circuit Low Voltage
P1825 Internal Mode Switch - Invalid Range
P1826 Internal Mode Switch C Circuit High Voltage
P1831 Pressure Control/Shift Lock Solenoid Control Circuit Low Voltage
P1832 Pressure Control/Shift Lock Solenoid Control Circuit High Voltage
P1833 Torque Converter Clutch/Shift Solenoid Control Circuit Low Voltage
P1834 Torque Converter Clutch/Shift Solenoid Control Circuit High Voltage
P1915 Internal Mode Switch Does Not Indicate Park/Neutral During Start
P2088 Intake Camshaft Position Actuator Solenoid Control Circuit Low Voltage
P2089 Intake Camshaft Position Actuator Solenoid Control Circuit High Voltage
P2090 Exhaust Camshaft Position Actuator Solenoid Control Circuit Low Voltage
P2091 Exhaust Camshaft Position Actuator Solenoid Control Circuit High Voltage
P2096 Post Catalyst Fuel Trim System Low Limit Bank 1
P2097 Post Catalyst Fuel Trim System High Limit Bank 1
P2100 Throttle Actuator Control Motor Control Circuit
P2101 Control Module Throttle Actuator Position Performance
P2105 Throttle Actuator Control System - Forced Engine Shut-down
P2107 Throttle Actuator Control Module Internal Circuit
P2119 Throttle Closed Position Performance
P2120 Accelerator Pedal Position Sensor 1 Circuit
P2122 Accelerator Pedal Position Sensor 1 Circuit Low Voltage
P2123 Accelerator Pedal Position Sensor 1 Circuit High Voltage
P2125 Accelerator Pedal Position Sensor 2 Circuit
P2127 Accelerator Pedal Position Sensor 2 Circuit Low Voltage
P2128 Accelerator Pedal Position Sensor 2 Circuit High Voltage
P2135 Throttle Position Sensor 1-2 Correlation
P2138 Accelerator Pedal Position Sensor 1-2 Correlation
P2146 Injector Positive Voltage Control Circuit Group 1
P2147 Injector Positive Voltage Control Circuit Group 1 Low Voltage
P2148 Injector Positive Voltage Control Circuit Group 1 High Voltage
P2149 Injector Positive Voltage Control Circuit Group 2
P2150 Injector Positive Voltage Control Circuit Group 2 Low Voltage
P2151 Injector Positive Voltage Control Circuit Group 2 High Voltage
P2152 Injector Positive Voltage Control Circuit Group 3
P2153 Injector Positive Voltage Control Circuit Group 3 Low Voltage
P2154 Injector Positive Voltage Control Circuit Group 3 High Voltage
P2155 Injector Positive Voltage Control Circuit Group 4
P2156 Injector Positive Voltage Control Circuit Group 4 Low Voltage
P2157 Injector Positive Voltage Control Circuit Group 4 High Voltage
P2176 Minimum Throttle Position Not Learned
P2177 Fuel Trim System Lean at Cruise or Accel
P2178 Fuel Trim System Rich at Cruise or Accel
P2187 Fuel Trim System Lean at Idle
P2188 Fuel Trim System Rich at Idle
P2195 HO2S Signal Biased Lean Sensor 1
P2196 HO2S Signal Biased Rich Sensor 1
P2199 Intake Air Temperature Sensor 1-2 Correlation
P2227 Barometric Pressure Sensor Performance
P2228 Barometric Pressure Sensor Circuit Low Voltage
P2229 Barometric Pressure Sensor Circuit High Voltage
P2231 HO2S Signal Circuit Shorted to Heater Circuit Sensor 1
P2232 HO2S Signal Circuit Shorted to Heater Circuit Sensor 2
P2237 HO2S Pumping Current Control Circuit Sensor 1
P2243 HO2S Reference Voltage Circuit Sensor 1
P2251 HO2S Low Reference Circuit Sensor 1
P2261 Turbocharger Bypass Valve Stuck
P2270 HO2S Signal Stuck Lean Sensor 2
P2271 HO2S Signal Stuck Rich Sensor 2
P2297 HO2S Performance During Decel Fuel Cut-Off Sensor 1
P2300 Ignition Coil 1 Control Circuit Low Voltage
P2301 Ignition Coil 1 Control Circuit High Voltage
P2303 Ignition Coil 2 Control Circuit Low Voltage
P2304 Ignition Coil 2 Control Circuit High Voltage
P2306 Ignition Coil 3 Control Circuit Low Voltage
P2307 Ignition Coil 3 Control Circuit High Voltage
P2309 Ignition Coil 4 Control Circuit Low Voltage
P2310 Control Circuit High Voltage
P2500 Generator L-Terminal Circuit Low Voltage
P2501 Generator L-Terminal Circuit High Voltage
P2535 Ignition 1 Switch Circuit High Voltage
P2544 Transmission Torque Request Circuit
P258A Vacuum Pump Relay Control Circuit
P258B Vacuum Pump Performance
P258C Vacuum Pump Relay Control Circuit Low Voltage
P258D Vacuum Pump Relay Control Circuit High Voltage
P2610 Control Module Ignition Off Timer Performance
P2626 HO2S Pumping Current Trim Circuit Sensor 1
P2637 Transmission Torque Delivered Circuit
P2763 Torque Converter Clutch Pressure Control Solenoid Control Circuit High Voltage
P2764 Torque Converter Clutch Pressure Control Solenoid Control Circuit Low Voltage
P2A00 HO2S Circuit Closed Loop Performance Sensor 1
P2A01 HO2S Circuit Sensor 2

 

[brap]

Is that ~$70 each, there are two correct? One intake and one exhaust?

Yes each. Retail at the dealer is higher, but they were always good about getting me a lower price. Just ask, or buy online.

The reason I mentioned changing your oil is because small debris can lead to early failure for the solenoids. Also there is an oring sealing them. Lube it with motor oil and slide it in and careful not to damage the oring or you'll have a small annoying leak. I did this as I wasn't careful enough, but rtv sealed it right up.

 

[kcits_gxp]

Should I bother replacing the actuators or just wait and see if the solenoids fix it?

 

[1 LIL NDN]

Can these be cleaned with a spray for sensors ? Thats cheaper then replacing right at the get go . That way if it works your good to go . If it don't work try one at a time.

 

[TomatoSoup]

Should I bother replacing the actuators or just wait and see if the solenoids fix it?

The things on the top-front of the cam-cover (whatever they are called) are the ones that most often seem to be the issue. Of course, YMMV

No Bobby, I don't think cleaning them will work, but maybe it could?