SO FRUSTRATED! Chugging problem!

Mustangflyer · #1 (**permalink**) 09-06-2010, 09:03 AM

Okay, so ive had it for weeks....its seems to do it more when its cold but its not cosistent. Ive gone thru everything I can think of...EBPS, UVCH, Loose wiring anywhere, fuel filter, oil change, HPOP level.
The truck, a 97 7.3, mainly on deceleration, but sometimes at idle does this really wierd chugging/miss. I though it was maybe the torque converter stayed locked up, but it does it in park and neutral as well.
Sometimes also its very sluggish, and then sometimes it runs *****en like it should. Im going to try and take a video of it doing it, but please guys, do you have any other ideas?! Im lost. Oh, and no CEL and no codes.

Mustangflyer · #2 (**permalink**) 09-06-2010, 10:19 AM

Sorry about the video being sideways..Im not sure how to change it. But here it is doing the problem. And remember, it does it in Park and Neutral as well and drive and reverse, and when its warm too. But again, nothing consistent

YouTube - VID 20100906 103515

powerhoghp · #3 (**permalink**) 09-06-2010, 10:29 AM

Turbo surge can cause symptoms like that. Is the truck tuned?

Mustangflyer · #4 (**permalink**) 09-06-2010, 10:52 AM

I dont think so. I just bought it two months ago...The guy said all that was done was the intake and exhaust, a new HPOP and injectors were rebuilt.

Mustangflyer · #5 (**permalink**) 09-07-2010, 07:26 AM

Anyone have any ideas?

UNDERCOVER_73 · #6 (**permalink**) 09-08-2010, 07:58 AM

Could it be the CPS? that sounds electronic...not anything manual.

Mustangflyer · #7 (**permalink**) 09-08-2010, 04:08 PM

Update...injector buzz test is fine....CCT test tomorrow afternoon.

Mustangflyer · #8 (**permalink**) 09-09-2010, 07:59 PM

So the puzzle gets more weird. Cct tests shows all cylinders failing. Now I'm even more confused.

**Dirk** · #9 (**permalink**) 09-09-2010, 08:14 PM

Contrib/balance failed or timed out? What are you testing with?

If it is a true fail, there will be codes. That chugging is most likely (in order):

IPR sticking
ICP sensor leaking oil into the connector
Crap injectors
Low oil volume to the hpop

Mustangflyer · #10 (**permalink**) 09-09-2010, 08:23 PM

Testing with a snap on Solis. Each cylinder had a code after the test was finished saying cylinder number whatever failed cct. Is there anyway to test an ipr? It seems to me that its just giving too much fuel too long so that would make sense.

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