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96 4.0 Rough Idle Problem

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Old Oct 26, 2005 | 12:03 AM
  #1  
ryno171's Avatar
ryno171
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Question 96 4.0 Rough Idle Problem

First want to send a note of thanks out to Bill and Jim ( Cowboybilly9mile and jimw411 ) for your help on a previous posting regarding my transmission problem earlier this month...you guys were right, $1700.00 dollars later, and one used tranny installed and I'm back on the road. I was wondering if you guys could help me out in trying to solve one other problem I've had since getting my Ranger back up and running. It's running great now, acceleration, milage, are pretty close to what they were before, no noticeable vibration, hesitation or sounds when going down the road. But when I come to a stop light, it vibrates like no tomorrow, even after the engine has warmed up. Put my foot on the gas and it goes away. It's vibrating so strong, my rear veiw mirror and side mirrors are noticiably blurred - but it never comes close to, or even hints at dying? I put together a list of the things I did on the tune up right before the transmission went out:

New plugs and wires / New fuel filter / New paper air filter ( had K&N before and got sick of dealing with it ) / Flushed the cooling system / Oil and Filter change / Replaced EGR valve after check engine code / Seafoamed the intake manifold using the instructions posted in the forum / cleaned the mass air flow sensor and throttle body sensor.

I used the vaccuum line from my brake booster to run the Seafoam through the intake ( great stuff by the way, made a huge difference overall ) I had a ton of vaccuum coming from the intake to that line. Is it possible that there could be a leak within the vaccum booster that causes my truck to idle rough when I hit the brakes? The rough iding doesn't stop when I put my truck in neutral or park, only lessens slightly in intensity. I've been in twice to Autozone and Checker to have the codes pulled - and I mean no offense to the people that work there, but I'm not real quick to believe their readings on the problem. Got a faulty EGR code the first time I went in, replaced the EGR with one of theirs, reset the computer, after the check engine light came on again, I went back in only to have them tell me - guess what - a faulty EGR code error again?? I'm at a loss - any input you guys have on this, or any ideas I can try would be greatly appreciated, I've learned more these past few weeks on this forum, than from years worth of dealings with dealerships and auto service centers here locally.

Thanks again - Ryan
96 Ranger STX 4x4 - 4.0 Auto
162k and counting...
 
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Old Oct 26, 2005 | 09:12 AM
  #2  
J7Bones's Avatar
J7Bones
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Where did you find the Seafoam Intake Manifold thread?

Perhaps I'm not looking in the right place...

Thanks!
 
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Old Oct 26, 2005 | 09:42 AM
  #3  
jinx102672's Avatar
jinx102672
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What was the exact code for the EGR? Whas it along the lines of insufficient EGR flow detected? If so it could be a faulty EGR solenoid. Even if it's a brand new EGR valve, the valve will not function properly without correct vaccum (which is where the EGR solenoid come in).
 
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