Injector not firing
 

Hello,
This is only my second post, I got in trouble for my first.

I received my TS chip on Monday. I originally purchased it from TDP. I bought it when I converted my split injectors to single shots. I have had trouble with the truck smoking when I start it up. It smokes like crazy until normal operating temps, or if I head down the road, it stops after the first quarter mile or so.

Local diesel shop tested and said number 7 injector wasn't firing upon startup.

I talked to Jim from Rosewood, whom I bought my injectors from, and he said all his warranty work is single shot conversions. He offered to replace the injector, but said a good tuner should be able to fix it. So I sent my chip to PHP after getting no response to my emails @ TDP.

Well, after retune, injector is still not firing when cold, smokes like crazy.

Was Jim Rosewood right?
Did I just waste $300 retuning?
What should I do next?

My truck is a 2002 Econoline Superduty Extended with 174K.

You wasted $300 because a tuning issue won't cause a single-cylinder misfire.

Thanks for the reply. I had described my problem to Cody at PHP and Jim Rosewood. I was left under the impression that tuning was the next logical step. I guess a new injector should have been the next step?

Well,

I ordered another injector from Rosewood. Took it to local diesel shop. They pulled drivers side valve cover, since #4 was missing on cold start up, and checked compression. Came back as follows:

#2 350
#4 330
#6 360
#8 340

Are these acceptable numbers? Shop said they were borderline and could be reason for misfire. Notice 4 is lowest. Truck still smokes and #4 misses on cold startup.

Thanks for any advice!

Appreciate any responses. Trying to figure out future of this truck.

I do not recall the limits, but your numbers look fine

Those numbers are at the VERY LOW RANGE of being acceptable. If those are "warm" numbers, they are low and will cause problems with a cold engine. The cold limit for a lot of diesel engines is 300 PSI and the warm numbers should be much higher than that (380-400).