Injector not firing

[rthammer]

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.

[cleatus12r]

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

[rthammer]

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?

[rthammer]

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!

[rthammer]

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

[INFRNL]

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

[cleatus12r]

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).