Compression Ignition Addict
Join Date: Feb 2011
Location: upstate ny
Thanked 3 Times in 3 Posts
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Does he ICP start at 0, and climb to 1500? What percent duty cycle is the IPR at at this point? If there is a break in the ICP sensor wiring, the pressure will read around 1500 on the scan tool as that is the default value without a sensor connected. The CKP/CMP won't sync until the truck starts, so that isn't an issue. Did you do a compression test? Disconnect the GPCM (glow plug control module) and have someone crank it while you spray starting fluid-if she starts and stays running, do a relative compression test, measure the percent change in rotational velocity in each cylinder, and a power balance test. If it starts and doesn't stay running, buzz the injectors.
I had a truck with similar issues-I replaced the cam and crank sensor, FICM, and checked EVERYTHING. I had good ICP, but still no start. Turned out to be low compression, engine was run on kerosene and overheated, seized all the rings and some of the valves were stuck open as well!
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2005 Lariat CCSB F-350 SRW
300,000 miles and going strong
12" fabtech lift with 40" Xterrain's on M/T classic locks, Adjustable track bar, Bilstein 7100 reservoir shocks
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Viair 450c compressor, dual 2.5 gallon tanks, air horns rated @115db