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Re: rough idle- test purge valve (long)
Posted by Jeff E (more from Jeff E) on Fri, 23 Apr 2004 11:29:27
In Reply to: Re: rough idle, mb25, Fri, 23 Apr 2004 10:58:07
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If you want to check the purge valve, remove the plastic cover on the back of the engine and unplug the hard purge valve line from the rubber hose comimg from the bottom left(passenger) side of the throttle body. There is a small clamp on this. The rubber hose is only aboout an inch long and is about 1/2 or more across. The purge valve is on the pass side fender inside a rubber mount. Don't unplug the MAP sensor, it is above/left of the throttle body and has a small hose going to it (5/32?). You can leave the part that runs off to the purge valve open (all this will do is vent fuel pressure) but you have to plug the part that goes to the throttle body. Make sure the plugged hose is sealed, if it leaks you will have a rough idle. Don't leave it like this permanently, just to check and see if it runs better.
posted by 216.248.17...
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