2002 7.3L No start - No smoke

11681 Views 9 Replies 5 Participants Last post by MickeyAkr, Jun 5, 2020

stp715a

Discussion Starter · Oct 6, 2015

Hi. Have read other related posts and tried the advice but cannot get the engine to start. Appreciate everyone's posts and would really appreciate some advice.

Engine stopped midway through a 200 mi trip. Would start rarely but a few times started when warm but only ran a few minutes. Towed home and now no start and no smoke. Am a weekend mechanic. More of a electronics guy and have the tools and experience to repair circuit boards.

Engine cranks over.
HPOP has oil within 1" of top. No HPOP leaks.
Fuel pump runs and fills fuel filter bowl.
Fuel filter is new. Changed filter when checking to see bowl fill by pump.
Batteries are charged and less than 1 yr old
GPR test good
Tach does not move when cranking. WTS DOES light every time.
CPS was replaced by Ford on recall 6 months ago.

Do not have a high end code reader but have a dashcommand which provides limited but some information. The data it provides is in the context of the PIDs interpreted by a set of dashes I am using. The interpretation of the pids was done by user rallyclimber at iPhone and Dashcommand with my 02 7.3 - Ford Truck Enthusiasts Forums.

When cranking the dash command provides these measurements:

EOT=59F
IAT=56F
IMAT=106F
EBP=14PSI
TFT=57F
ICP=2000PSI while cranking and 222PSI with key in ignition after cranking stops.
GPR=98.83 (not sure what this number represents but the GP side of the GPR terminal reads ~.75 volts less than the hot side of the GPR.
MAP=99 kPa

Check engine light does not come on and the dash command does not read any codes even though it has a limited capability. All fuses test OK.

Appreciate any suggestions on where to look next.

Thanks

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klhansen

· #3 · Oct 6, 2015

Gator5713 said:
Probably the cps. The ford replacement isn't great to start with and could have gone bad already.
The tach not moving also points towards the cps. Someone more knowledgeable I'm sure will chime in and confirm or give you someplace else to look.

The tach not moving is only a good indicator on '99-01 trucks. Not conclusive on '02 and later.

You may have a biased ICP sensor if you get that high on cranking and still at 222 psi when not cranking. It should drop to near zero when not cranking. Try pulling the wiring connector off the ICP sensor and crank it again. It will light the SES and throw a code, but should start if the sensor is bad. What a biased sensor would do is cause the IPR to dump HP oil pressure (thinking it's too high) to a point where the injectors are only drooling fuel, and not spraying.

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klhansen

· #6 · Oct 6, 2015

Follow the wiring connected to the ICP sensor back to a branch and then down into the engine valley toward the front on another branch. The lowest connector will be connected to the IPR. Check to be sure that the solenoid coil is still in place on the IPR, and the sheet metal nut is secured. If the nut is not on the stem or the coil has fallen off, then the HPOP can't develop pressure to operate the injectors.

The only way to test the IDM is to run an injector buzz test. But the IDM is one of the last things you should suspect.

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