Crank No Start
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New User
Joined: Sep 2019
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From: Charleston, Sc
Crank No Start
Started truck about two weeks ago and it idled for approx. 5 minutes then shut off. Hasn’t started since. Both batteries are 10/20. Throwing codes, p1668, p0470, p1746, PCA, and PCM. Ordered a new CPS. In the past that seems to be the issue. I haven’t had these codes before, but any ailment seems to be fixed with a fresh CPS. The IDM was replaced in 2015. I have no code for CPS. I have no rpm on crank and when I emptied fuel bowl it did not refill. I have checked all looms and have no bare wires or loose wires. All relays were tested in horn slot. No blown fuses either. The driver side uvch was replaced a year ago. Didn’t have time to do passenger side, but has been running fine since the replacement. Any help would be great.
sorry if this is poorly written, I’m four scotches deep.
sorry if this is poorly written, I’m four scotches deep.
5th Wheeling
Joined: Dec 2020
Posts: 32
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Does your fuel gauge read correctly on both tanks? If not I suspect fuel tank selector valve is stuck and that might explain no fuel flowing to your bowl.
The no RPM tach is normally CPS... Is it cranking fast enough? - it won't even TRY to start if cranking too slowly.
The no RPM tach is normally CPS... Is it cranking fast enough? - it won't even TRY to start if cranking too slowly.
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New User
Joined: Sep 2019
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From: Charleston, Sc
Does your fuel gauge read correctly on both tanks? If not I suspect fuel tank selector valve is stuck and that might explain no fuel flowing to your bowl.
The no RPM tach is normally CPS... Is it cranking fast enough? - it won't even TRY to start if cranking too slowly.
The no RPM tach is normally CPS... Is it cranking fast enough? - it won't even TRY to start if cranking too slowly.
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From: Charleston, Sc
Need the truck running to get fuel in it haha
More Turbo
Joined: Jun 2009
Posts: 580
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From: Michigan
You said you don't have any RPM signal, that means the PCM thinks the key is on and it's waiting for that signal to fire the injectors. No tach signal = injectors not firing. The PCM doesn't know the engine is cranking.
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From: Charleston, Sc
i put in a new cps. No change. Another thought I had is my batteries are always low. Could my alternator have died, killed the batteries, causing the original stall, and now even with a recharge there isn’t enough umph to fire everything? I started the passenger uvch tonight. Will finish tomorrow or Sunday. Would a faulty pcm throw the p1668 code?
may bot be of importance, but this evening when trying to crank I noticed that the engine temp light and the fuel filter light were on.
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From: Charleston, Sc
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