I have a 2002 GMC Envoy SLE with an i6 4.2. I had the dreaded rough idle in park, neutral and when shifted into drive. Sort of mild and not persistent and was tolerable - like a reoccurring rash. Little ointment and long sleeves and all was well. Until now.
I just did a cylinder soak with seafoam (it's come to this) and vacuumed it all out trying to fix this idle. Car wouldn't start after this. Got it started finally - different posting - still not sure what happened. Then I blew 24 oz through the intake. I had the pedal wedged at 1800 rpms for the seafoam and all seemed well. Right. Went for a test drive and I got P0014 Exhaust Camshaft Position (CMP) System Performance and P0300 General Misfire. The battery had drained completely while I had the starting issue so I thought maybe it did a relearn for the throttle while I was revving and seafoaming because I didn't test drive first, so I disconnected the battery for a couple of hours and took it for another test drive. Still get P0300 and P0014. "Ah, P0014, it's been a long time my diagnostic friend."
No codes were set in the last couple months prior to seafoaming. Two full months! I was dancing and skipping with Jesus in the sunshine. So no codes and it was a much milder, less consistent rough idle, though it was increasing over the past months. I've put in new – Coil Packs, AC Delco Iridium Plugs, Both Oxygen Sensors, Cam Position Actuator Solenoid, Cam Position Sensor, Intake Air Temp Sensor, MAP Sensor and Crankshaft Position Sensor. Also a Fuel Filter, Air Filter and the Intake was off and cleaned and has a New Gasket when I put in new/used Injectors and a new/used Fuel Pressure Regulator which came used from ebay with 50k miles on them (wish I would've went with new instead -cost(dumb). I cleaned the throttle body several times and finally bought a new one a few months ago because it has a sealed sensor on that, so that’s new too. I replaced the 8-wire pigtail on the sensor throttle 2 years ago because it was bad. Oil flushed with crankcase cleaner a year ago – was desperate then, too. Oil change this morning. The battery is new this year but it drained on me in the garage this week and I wasn’t sure if I left something on. Test drove it and it drained again yesterday. This is just getting better. When I hook up the charger the headlight washer activates and sprayed me - huh?. That's not normal, that's an attitude problem (wiping face).
I think I'm going through 2-3 ounces of oil per month so I performed (you know, like a circus monkey) a cylinder pressure test. Dry test came out (from rear to front) : PSI – 118 137 135 140 130 140. I was unable to get the adapter threaded into the cylinders so I held the test gauge tube by hand. Not sure I had a good fit at the rear cylinder so I wet tested with a firm fit at – 140 150 150 154 151 160. The rear cylinder seems suspect but not hugely out of range to me. Plugs all looked consistent and all good. Maybe a leak down test is needed? Sledge hammer? Tall cliff? I do live near a river.
So now I don’t know what to do with this P0014 code. Another Cam Position Actuator Solenoid? – sure, whatever you want (muttering) you bottomless money hole. "What's that dear?" "Um, nothing!" (did it hear me)? How about a catalytic converter…motor mounts…ECM? Only if I have to pay full retail! Alright! Gosh - can I pretty please pay with blood and tissue instead of cash? (fingers crossed)
I want to love this car and give it everything it wants but it hates me. I’ve spent more time with it than humankind but it spits in my face, literally. I don’t think I want to be nice to it anymore. It makes me feel bad and useless, dirty – like bad touch. It plots against me. It makes me angry. I used to think I knew things but this car makes me feel stupid.
I just did a cylinder soak with seafoam (it's come to this) and vacuumed it all out trying to fix this idle. Car wouldn't start after this. Got it started finally - different posting - still not sure what happened. Then I blew 24 oz through the intake. I had the pedal wedged at 1800 rpms for the seafoam and all seemed well. Right. Went for a test drive and I got P0014 Exhaust Camshaft Position (CMP) System Performance and P0300 General Misfire. The battery had drained completely while I had the starting issue so I thought maybe it did a relearn for the throttle while I was revving and seafoaming because I didn't test drive first, so I disconnected the battery for a couple of hours and took it for another test drive. Still get P0300 and P0014. "Ah, P0014, it's been a long time my diagnostic friend."
No codes were set in the last couple months prior to seafoaming. Two full months! I was dancing and skipping with Jesus in the sunshine. So no codes and it was a much milder, less consistent rough idle, though it was increasing over the past months. I've put in new – Coil Packs, AC Delco Iridium Plugs, Both Oxygen Sensors, Cam Position Actuator Solenoid, Cam Position Sensor, Intake Air Temp Sensor, MAP Sensor and Crankshaft Position Sensor. Also a Fuel Filter, Air Filter and the Intake was off and cleaned and has a New Gasket when I put in new/used Injectors and a new/used Fuel Pressure Regulator which came used from ebay with 50k miles on them (wish I would've went with new instead -cost(dumb). I cleaned the throttle body several times and finally bought a new one a few months ago because it has a sealed sensor on that, so that’s new too. I replaced the 8-wire pigtail on the sensor throttle 2 years ago because it was bad. Oil flushed with crankcase cleaner a year ago – was desperate then, too. Oil change this morning. The battery is new this year but it drained on me in the garage this week and I wasn’t sure if I left something on. Test drove it and it drained again yesterday. This is just getting better. When I hook up the charger the headlight washer activates and sprayed me - huh?. That's not normal, that's an attitude problem (wiping face).
I think I'm going through 2-3 ounces of oil per month so I performed (you know, like a circus monkey) a cylinder pressure test. Dry test came out (from rear to front) : PSI – 118 137 135 140 130 140. I was unable to get the adapter threaded into the cylinders so I held the test gauge tube by hand. Not sure I had a good fit at the rear cylinder so I wet tested with a firm fit at – 140 150 150 154 151 160. The rear cylinder seems suspect but not hugely out of range to me. Plugs all looked consistent and all good. Maybe a leak down test is needed? Sledge hammer? Tall cliff? I do live near a river.
So now I don’t know what to do with this P0014 code. Another Cam Position Actuator Solenoid? – sure, whatever you want (muttering) you bottomless money hole. "What's that dear?" "Um, nothing!" (did it hear me)? How about a catalytic converter…motor mounts…ECM? Only if I have to pay full retail! Alright! Gosh - can I pretty please pay with blood and tissue instead of cash? (fingers crossed)
I want to love this car and give it everything it wants but it hates me. I’ve spent more time with it than humankind but it spits in my face, literally. I don’t think I want to be nice to it anymore. It makes me feel bad and useless, dirty – like bad touch. It plots against me. It makes me angry. I used to think I knew things but this car makes me feel stupid.
