Join Date: Jun 2019
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
96 7.3 Federal PCM with single shot 160cc 30% larger nozzle issues
I have a 96 F350 7.3 that just started to have an issue that I can't seem to fix/ figure out.
This is my 4th 7.3 (1 93 IDI, 1 97 7.3 DI, 1 early 99 DI) and this is the first one that has give me any real trouble.
It has stalled out and died leaving me stranded twice in the last two days.
The first night it stalled out and wouldn't start and threw the P0344 code and so I installed a new CPS in it.
The next day it stalled out and died on my on the freeway (wouldn't start) and threw P0603, P0344, P0340 and P1211...
I got towed to the nearest diesel shop to me who I have great experience with, is well respected around here.
It fired right back right as it got off the tow truck....
He couldn't find anything wrong with it and believes that I am having trouble with my chip interfacing with my PCM (the chip is a custom DP Tuner F5 that the previous owner installed).
We removed the chip from the PCM.
The truck isn't stalling out anymore (since I have gotten it back) but it is running oddly without the chip.
The truck has single shot 160 cc 30% larger nozzle stage one injectors in it, e-fuel, early 99 SD intercooler, and a Terminator T500 HPOP; otherwise the engine is stock.
The truck is idling hi and rough, and the accelerator is very touchy.
My ICP's at idle are pretty low, as low as 418 PSI and my IPR % seem normal at idle around 10%.
I believe that my PCM is a federal one and not a California split shot one.
I live off a dirt road and travel in remote areas of California and Mexico alot and thus reliability is more important to me than performance. I would prefer not to have a chip so that it doesn't rattle loose on a washboard road/ cause issues that can't be fixed in the middle of nowhere.
Am I going to damage the truck running it without a chip with these injectors?
Should I get my PCM reflashed to match the injectors?
Can a local shop do this or do I need to send it to DP and have my truck down for a couple of weeks.
Thank you in advanced!!