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1999 to 2003 7.3L Power Stroke Diesel 7.3L Power Stroke Diesel equipped Super Duty and Excursion

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  #1  
Old Thu, June 7th, 2012, 07:51 PM
rthammer rthammer is offline
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Default 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.
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  #2  
Old Fri, June 8th, 2012, 08:46 AM
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cleatus12r cleatus12r is offline
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You wasted $300 because a tuning issue won't cause a single-cylinder misfire.
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Old Sat, June 9th, 2012, 10:30 AM
rthammer rthammer is offline
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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?
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Old Sun, July 1st, 2012, 11:25 PM
rthammer rthammer is offline
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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!
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Old Tue, July 17th, 2012, 11:07 PM
rthammer rthammer is offline
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Appreciate any responses. Trying to figure out future of this truck.
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Old Wed, July 18th, 2012, 12:51 AM
INFRNL INFRNL is offline
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I do not recall the limits, but your numbers look fine
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Old Wed, July 18th, 2012, 06:56 AM
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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).
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