hi everyone i am new too this board and im having problems with my truck.. it has s&b air intake fiull 4" exhaust and edge evo programmer... had shutter issue i thought was torque converter chatter had tripple disc built along with tranny come too findout problem still there ohh well got bullet proof tc and trans ... did inj test #8 failed test replaced injector harness and valve cover gasket same thing shutter/miss in od tried another new inj same prob.. started it next morning ran great for bout 1 mile then started acting up again.. can some one please help me im lost and have a headache already

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im soo lost on this damn truck... took ebpv off and tied it open sounds better but still has miss or shutter in low speed od when your 50+ its fine in od

 

are you getting buzz test failure on #8 or contribution test failure?

 

it failed contribution test 3 times tomorrow im putting a ford oem injector in it too see if it helps the problem what else can it be

 

i would put in a new CPS, they are cheap and a common problem

 

if its failing contribution id check compression

 

after i changed harness and valve cover gasket it ran like a scouled dog for bout 5min i couldnt see the road behind me i was just bellowin smoke down the road i turned around and it started runnin like poop again... why check compression

 

Its failing contribution test. compression check is free, injector isn't. You said you've already tried a diff. injector in that hole. you replaced harness and gasket, hopefully you inspected the connector and it wasn't melted. buzz test ok, no idm codes. if comp. is good id go for an injector. buzz test should have failed if harness was problem. To me it sounds like as your truck warms up it starts messing up on #8 so Id check compression before trying an injector

 

well it has new injector new wiring harness and new valve cover gasket.. i bought a new cps gonna put it in in the morning stupid bolt is giving me problems it passed the buzz test all everytime since i replaced the harness and gasket.. like i stated it ran great that one time after replacing everything then went back too crap hopefully this sensor does the trick if not ill be going too buy a diesel compression gauge any other ideas

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well it has new injector new wiring harness and new valve cover gasket.. i bought a new cps gonna put it in in the morning stupid bolt is giving me problems it passed the buzz test all everytime since i replaced the harness and gasket.. like i stated it ran great that one time after replacing everything then went back too crap hopefully this sensor does the trick if not ill be going too buy a diesel compression gauge any other ideas

 

alright still having the problems i ohm ed out the injectors this morning and they were all 3.7 on all 8 how can i ohm out the idm or should i just replace it with high volt high freq??? any suggestions or other test too try out first any help would be greatly appreciated

 

sounds like I agree with the compression test. If you havent done this yet then you should. Compression test basically makes sure that the seals around the piston are still good. Sometimes pistons get "washed out" meaning that the fuel overloaded the piston and broke your oil seal. It doesnt mean that the piston is ruined but it does mean that the piston needs resealed. Sometimes (like with mine) my cylinder got washed out and i replaced the injector. Well the injector was good but it continued reading bad even tho it would pass the buzz test(because the injector was good). Blatantly....compression test.

I hope you have already figured out your problem since this was lasted updated in april. If so, you should follow through with your posts so that if people have the same issue that can find a resolution.