How do you tell what injector is bad? - Diesel Forum

TT_05_Stang · 10-20-2009, 07:17 PM

I tried searching for some info on this and didnt find much. If anyone could point me to a thread that explains how to locate the bad injector that would be great. I have heard of a "buzz box"? and a cyl tester? Is that compression tester? LOL I am a gasser mechanic... never played with the diesel until now...

Anyways how can you find the bad injector? and also what are the tell tail signs of a bad injector. Mine ran rough when cold, felt like a miss until warm, then it smoothed up, just less power. Now 4 weeks later, I can hardly get it started, and it misses all the time, but it does get better once warm.

All help apprecieted!

Will

Texascadillac42 · 10-20-2009, 08:22 PM

Get a good scanner that can do a cylinder contribution test. This will isolate which cylinder is missing (hopefully) and get you on the right track.

TT_05_Stang · 10-20-2009, 08:33 PM

Quote:

Originally Posted by Texascadillac42

Get a good scanner that can do a cylinder contribution test. This will isolate which cylinder is missing (hopefully) and get you on the right track.

Hey Thanks!

What scanner do you suggest?

Will

LocoMike · 10-20-2009, 09:21 PM

Quote:

Originally Posted by TT_05_Stang

Hey Thanks!

What scanner do you suggest?

Will

AutoEnginuity is a great tool (more than a scanner). If you buy the "FORD Package" you can do a buzz test ie. fire ALL solenoids, then EACH solenoid.

It will do cylinder contribution data logging also. Seeing you High Pressure Oil Rail pressure is also a nice benefit of it.

Texascadillac42 · 10-20-2009, 10:55 PM

x2, AutoEnginuity is a great one. If you have access to a SnapOn scanner, many of them can do it too. Also, if you have a Ford dealer you can trust, they can scan it, and give you the results.