Surge/miss back again
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Senior User
Joined: Dec 2002
Posts: 288
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From: New Jersey
Surge/miss back again
Maybe some of you guys remmeber I posted a few times a while ago about a miss I was having. I have replaced and checked just about everything. then it finally went away over the winter and now its back again, although it seems more like a surge now. I have had it for a while and it seems that in the cold weather it goes away and in the warm weather it starts up again. I need to find this its driving me crazy. its a 91 351 with e4od. Here is the list of everything I changed thanks for any help
EGR valve and sensor
cap rotor
wires
plugs( I changed them again recently when i did headers and they were pretty white)
TPS
cleaned throttle body
cleaned IAC
checked fuel pressure seemed with in spec
changed fuel filter
changed ign module
changed ign coil
ran fuel injection cleaner a few times
I checked for vacuum leaks but i didn't find anything
EGR valve and sensor
cap rotor
wires
plugs( I changed them again recently when i did headers and they were pretty white)
TPS
cleaned throttle body
cleaned IAC
checked fuel pressure seemed with in spec
changed fuel filter
changed ign module
changed ign coil
ran fuel injection cleaner a few times
I checked for vacuum leaks but i didn't find anything
Cargo Master
Joined: Nov 2003
Posts: 2,000
Likes: 39
From: North Dakota
I would do a compression test. I was kind of having the same problem and the compression test did not help me but it narrowed things down. I would then put on some rubber gloves and while your truck is running pull each wire by the plug carefully. When you pull a plug and it has no effect on the engine then your problem is with that cylinder. Mine was a bad fuel injector. Just a thought.
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Senior User
Joined: Dec 2002
Posts: 288
Likes: 0
From: New Jersey
thanks guys. I was thinking about changing the pressure regulator. Its fairly cheap and easy. Kameronth I'll see if i can do a compression test. I don't know if pulling wires will find it the problem doesn't happen at idle, almost everytime it happens while cruising, and sometimes while accelerating
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