Can You Figure This one Out

J

JLWelding

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Joined
Apr 29, 2009
Messages
111
Can anyone pin point this problem? I have been on every fourm I know and had it in a lot of shops and no one can find the problem. Ok I just came back from a 450 mile round trip and I am about to fine me some dynamite and blow this *************** thing to the moon. It is right back to surging and missing and lopeing. I cant take this crap no longer. I have spent 3500.00 in the passed 3 weeks and no head way.
Here's a list of everything that has been replaced in the last year, oh and if you wont to, start bidding because I am about to by a ford.
Blue Chip pump 1800.00 2 weeks old
ECM 2 days old from Dodge 1100.00
DDP injectors 2 weeks old 500.00
New Fan and Clutch
New Cam Sensor
New A/C Delco Starter 3 months old
New A/C Compressor 12 months and blows 30 degree
South Bend Clutch 2 years
BD Intake
Edge EZ with in cab power switch 3months old
New KYB shocks
New Brakes all the way around with drums and rotors
New Airdog 150 draw straw
Airdog 100 19 months old
Pricol Gagues 19 months old
New Radiator 2 years old
Steering Gear Box 2 year
New Drive Shaft, carrier bearing and u joints 12 Months
5 Inch Exhaust with Muffler 12 months

http://www.youtube.com/watch?v=vl_zWejfBsc
 
are you revving it up in your video? if that is just you revving it, then the odd idle you have sounds like its the way your IP runs.. i dont think theres anything wrong with it...
 
The miss started after this video was taken. The surge will fall so low that it will almost die. When it is cool in the morning there is no miss no surge runs great. As soon as I drive down the road about 400 yards it starts missing. Thats why everyone thought ecm when vp didnt take care of it. It seems like as soon as the block starts to warm up it starts surging and missing.
Truck ran fine all day Friday and when I went to south tx. it ran fine going down, coming back it started surging the same way the old ecm did. It's like it fixed it for a day and then it goes right back to the same old. When we put it on by pass box it ran perfect eng. at normal temp no surge no miss no nothing. Took by pass box off and right back to missing and surge, so what gives, wiring harness? The rump rump rump you hear no video is not me its the eng.
There is another man on hear name kc04 has the same exact same problem. He should have just installed his ecm. I hope it fixes his. Maybe he will chime in.
The only thing that has not been replaced is the mapp and ait sensors. The cam sensor has been replaced.
Thanks for your help
Joe
 
Head gasket?

Coolant system pressurizing and coolant leaking into the cylinders?

just a thought on what could be causing your miss...
 
IAT would be my guess.

Get a real scan tool that allows you to monitor sensors in real time.
 
Well it sounds like a f**ked up lope. Trucks runs fine and doesnt miss goin down the road just at idle. Its like a counterfit lope. I guess if i wanted to put a smoke switch and telleverybody i had a hotrod pump it would be ok. But this is fixin to get my truck sold. Im about fed up with it and nobdy seems to know what it is.
 
What about the shims on your injectors? are they new or did you re-use the old ones? also are all injector lines tight?
 
New shims, lines are tight. As far as apps go I have one came from Dodge and one came from Timbo, both run the same no change.
 
Unplug the air intake temp sender and the coolant temp sender and see how it idles. Yes it will throw some codes, but it may answer your question. Start with the coolant temp.
 
When the truck is cold or been sitting for a while its smooth as glass. When i start it up in the morning it runs great. But the warmer the truck gets the worst the idle gets. With mods you see in my sig truck wont evn slip stock clutch.; Its used to smoke the chit out of it. Ecm should be in tomorow and i will see what that does. Im having the same problem as jlwelding me and him are thinkin about blowin these b*stards up side by side if we cant figure this out.
 
So your talking about the sendor next to the thermostat, pull it first then the ait second or both at same time.
 
JLWelding said:
So your talking about the sendor next to the thermostat, pull it first then the ait second or both at same time.
Click to expand...

Yes that one. Just unplug the temp sendor and start the truck. Then do the same thing with the air temp.
 
Im gonna try this tomorow when i get off. Should i do it when truck is warm.
 
Ok, I will change orings again. I pulled the air intake sensor and no change, and pulled the temp sensor and no change. I had plug at vp ohmed the mech. said it was ok, but I am also hearing that dont mean anything. I know when I replaced the ecm the plug was real loose like there is no drag to plug in or remove is this normal? The connection at the vp is real hard to get off and on.
 
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