2001 C70 Rough Idle, Stalling

jackissocool · Post by **jackissocool** » 07 Mar 2015, 16:21

My C70 is idling rough and stalling. Check Engine light it on. The codes I'm getting are P0300 (random misfire) P0014 (Camshaft Position - Timing Over-Advanced or System Performance) and P0342 (Camshaft Position Sensor "A" Circuit Low)

Upon initial issue, there was oil in the spark plug tube on cylinder 4

Everything I've done so far to the car: tune up (plugs, boots, fuel filter, air filter) and replaced the camshaft sensor

Any help on this would be appreciated. Thank you.

Post by **abscate** » 08 Mar 2015, 07:08

Have you jump started it recently? The ignition coils (5 on this car) are sensitive to over voltage and can go bad. Vacuum leaks are also culprits

Post by **JRL** » 08 Mar 2015, 07:12

Bad coil
Bad ETM
and a clogged breather box for starters.

Check all, but start with the coil and spark plug on that cylinder

Post by **precopster** » 09 Mar 2015, 11:56

The timing code is one to be alarmed with. The timing belt could have skipped a tooth. Remove cover ASAP and check the timing.

Also the CVVT solenoid may have clagged.

ETM will NEVER cause a P0014.

The misfire may be related depending on how many teeth it's jumped or how clagged the CVVT is. BTW it's a cylinder 1 misfire code.

jackissocool · Post by **jackissocool** » 10 Mar 2015, 12:42

I just checked, and yeah, the timing belt is off

Post by **precopster** » 11 Mar 2015, 14:11

The tensioner's tension is probably number 1 suspect or possibly a seized bearing in the tensioner itself or the idler or water pump.

Best way is to remove the belt and spin the above by hand. If they spin freely that's bad. If not I would still buy a new timing tensioner and belt as the spring may have lost tension.

jackissocool · Post by **jackissocool** » 11 Mar 2015, 21:36

New belt, tensioner, and pulley are currently being installed. I would've had the job done by now, but the belt is giving me trouble trying to squeeze it past the crankshaft. i'm hoping that this problem didn't destroy my valves

Post by **abscate** » 13 Mar 2015, 05:37

Sending good karma. I think if you are idling, you saved the engine.

jackissocool · Post by **jackissocool** » 13 Mar 2015, 08:17

thanks. we can only hope that it's okay. it was running enough to drive it, so, hopefully

jackissocool · Post by **jackissocool** » 16 Mar 2015, 16:43

so, the engine is toast. valves are gonna need replacement. not looking forward to it at all, so if anyone has any tips, or links that would help me to replace the valves, please let me know