1994 Mustang 3.8l Misfire And Jerking

Kevin Roach

New Member
May 28, 2015
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Hey Guys!

I know this may have been addressed a thousand times but I looked on the forum and couldn't find anything.

I have a 1994 Mustang 3.8l engine that when cold misfire, idles rough and when driving jerks. I have done some checks, cleaning and replaced parts and still the same thing. It runs a lot butter when warmed up or doesn't always do it. It is not throwing any code either.

I and the previous owner have replaced, egr valve, fuel filter, crank sensor, verified TPS is working correctly, cleaned and checked the MAF, fuel pressure is 30 ignition on/engine off, fuel pressure ignition on/engine on at 30-40 when I rev the engine, new plugs, new wires and new coil pack.

It seemed to be better after the coil pack but still doing it just not as rough misfire.

Any help and suggestions appreciated.
Thanks!
Kevin
 
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