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Old Dec 12, 2018 | 11:43 AM
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onehundred80
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Joined: Apr 2006
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From: Ontario
Default Re: No start and high idle

Originally Posted by jefftalexander
Replaced:
1) Crankshaft Position Sensor: Bosch 0261210170
2) Camshaft Position Sensor: Intermotor PC641
3) Re-soldered RCM (three posts)

New Symptoms:
Oddly, the no start problem is now more pronounced. The high idle is no longer an issue and the check engine light does not come on at any time.
The car does start and run, but intermittently will not start. The engine turns over; the starter engages and cranks just fine. It does occur more when the engine is at operating temperature.
When attempting to start, when the the key is returned to the off position it sounds like there is a very subtle back-fire - a very slight puff.
Further information: I replaced the Crankshaft Position Senor first and it started up perfectly (with the old Camshaft Position Sensor). I then replaced the Camshaft Position Sensor and the engine hesitated, I returned the key to off, then tried again and it started.
I don't have an OBDII scanner, so I am unaware of any codes. I will be purchasing one tonight.

I have made a youtube video of the problem which can be found below. It starts fine the first time...symptoms appear on 2nd start attempt. here.

Thanks in advance for your knowledge and help!
Jeff
Put the old camshaft sensor back to start. Do not use the Intermotor camshaft sensor, only use a Bosch one, other camshaft sensors have caused problems out the box, some do not fit the OEM socket on the car too well and do not work properly.
As we say here ‘Buy Bosch or Walk Home’.
It is cheaper to buy the parts using the manufacturer part number, not the Mercedes or especially not the Chrysler numbers.
 
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