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#1
05-11-2007, 02:38 PM
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1994 e320 rough idle hesitation
I have a 1994 e320, the problem started after i pumped regular gas in it. then it started idling up and down only when in park or neutral. then after time it started doing it in drive a little. i stayed like that for a while.
I cleaned the intake with intake cleaner, i changed the aprk plugs with the best bosch + 4 plantinums, and no change. i changed the maf then the revving an idling just got faster, but not fluctuating as much. but it really gets bad in drive when stopped, ( looks like i have hydraulics). the car is still hesitating like crazy, i even tried fuel injection cleaner. the idle will not settle in the 700 zone, it keeps howing rough idle. i even checked the egr valve with a vacuum, seems fine. now i have no check engine light, i did before i changed the maf. any ideas? thanks 
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#2
05-11-2007, 02:52 PM
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<< i changed the aprk plugs with the best bosch + 4 plantinums,>>
Wrong plug for this motor. You want Bosch F8DC4 and for starters, change the plug connectors under the coils. Do a Search on it w/search feature. Last edited by Arthur Dalton; 05-11-2007 at 03:06 PM.
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#3
05-11-2007, 03:09 PM
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when i bought the plugs those were the ones listed, along with the normal bosch ones, they said they are the best ones on the market.
so you think I should change the rubber parts under the 3 coils? and keep the bosch +4 's? b/c the plugs were pretty pricy also and i didnt have to gap them b/c of the 4 heads. but you do have a point.
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#4
05-11-2007, 03:16 PM
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Do a Search on Plats in a 104 engine and you will have enough info about their faiulure to fill a NY City phone book..
I repeat..you want the Bosch Supers the el cheapos along with new plug connectors. Seeing that you are new , I will start the search for you.. 1995 E320 Sedan 104 hesitation
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#5
05-11-2007, 03:23 PM
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thanks man, it all makes sense now. i will change my plugs and boos tomorrow, i called the dealer, they have them. i will just install the bosh platinum +4's in my infinity qx4 97 since they take hte same plugs. i had a feeling it had to do with the ignition system b/c it felt like that kinda rough idle. so i just need the normal bosch non platinum plugs right?
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#6
05-11-2007, 04:57 PM
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Right...Bosch Super Copper-Standard plug
F8DC4 104 engines hate platinum...they throw-up if you even mention platinum 
Last edited by Arthur Dalton; 05-11-2007 at 05:11 PM.
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