Injector Buzz Test popped these codes.....

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Jul 15, 2004 | 10:43 AM

mudinford

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Joined: Jan 2000

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From: Villa Ridge, MO

Injector Buzz Test popped these codes.....

Preformed an injector Buzz test and these codes popped up:

P 1276 (Injector 6 High to low side open)
P 1278 (Injector 8 High to Low Side open)
P 1293 (Bank #1 Right side; high side open)

Does any have any suggestion what i need to tackle? We just replaced the #6 injector....and the truck misses bad when running....seems to be 2 cyl's....matches the test.

Truck is the following:

1999 F-350...one of the first off the lot!

Thanks in advance....

Dan

Jul 15, 2004 | 04:33 PM

International Tech

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From: West Columbia, SC

worst case scenario R+R both injectors or IDM fault . I would look at the connections at the valve cover and underneath it. Maybe the clips came off the injectors or the harness is pinched or broken somewhere.

Jul 15, 2004 | 06:08 PM

mudinford

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From: Villa Ridge, MO

I just replaced the #6 injector (First thing we did about a month ago when we had time to look at it!!!)...and R&Red the Cover Gasket and harness. Still missing like a mug. I did get an IDM code every so offten...but not all the time. I got the prementioned codes about 80% of the time when testing. Might have had something to do with low batt voltage. Got em topped off now. Seems to have a stumble when cranking too........slow, slow, slow, slow, slow, slow, slow, fast. if that makes since.

Jul 15, 2004 | 09:18 PM

Kwikkordead

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From: Rio Rico, AZ.

An open circuit is no connection. I would check the continuity at the wiring harness's. Somebody else back me up on this, but isn't it true that the wiring harness's inside the valve cover fail a lot?

Jul 16, 2004 | 04:00 AM

slc10844

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From: Baltimore

Do you have much blowby? Sounds like you may have a bad piston.

Jul 16, 2004 | 11:59 AM

mudinford

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From: Villa Ridge, MO

Did a compression test....had compression. BUT i am not sure what i needs to start. It was well over 100 PSI. We did change the valve cover gasket and harness to the right side of the motor....did not change anything. Still missing. BUT, forgot to mention this, when the buzz test is preformed, the 6&8 injectors buzz LOTS quieter. I dont know...my end up with the dealer....i tried!

Dan

Jul 17, 2004 | 12:04 AM

Kwikkordead

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From: Rio Rico, AZ.

100 psi would be only barely acceptable for a gas engine. I work on VW and Audi for a living and thier diesels have 22 to 1 compression and won't even start at anything below 375 psi if the engine is cold and the glow plugs are all working. A good VW diesel will be about 430 psi. The Powerstroke is a little lower compression but you still need to see a lot more than 100 psi. More like 300+ I would think. I think you need a whole new engine.