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Old 08-28-2006, 06:50 AM
300ESUPER 300ESUPER is offline
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Join Date: Mar 2006
Posts: 84
1989 300E start up problem

First off I would like to thank everyone with the help of installing my new water pump and tensioner this past week. The install was no problem with your help.

No the problem. I posted this prblem before.

When the car is cold I have a rough idle (the RMPs are around 500 and the car shakes and stalls. After the car has been driven for a couple a minutes the car idles excellent and the car drives amazing.

I have already changed:

water temp sensor, dist cap, dist rotor, spark plugs, fuel filter, 2 fuel pumps, fuel accumulator, air filter.

The ignition wires a 4 years old. I think they are still in good shape but how do I test them just to make sure?

I was thinking of doing a throttle body cleaning to see if that would be some help.

I was woundering if this could be a fuel injection problem, idle control valve, fuel pressure regulator or cold start valve? Also is there a throttle positioning sensor in the car and if so could that cause me problem?

I have had this problem for about 8 months and it is just getting worse.

Thanks

Fab

Last edited by 300ESUPER; 08-28-2006 at 07:06 AM.
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