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Comments
??did you go to a dealer for the new cluster,was it OEM or aftermarket?
Any ideas?
So far, I've replaced the fuel filter, air filter, and spark plugs; I think they were the original plugs! And I've verified over 55psi cranking fuel pressure at the fuel rail check port behind the throttle body.
It was delivered 2.5 qts low on oil, and the "Check engine oil level" light was on. I've added the correct amount of oil. There are no signs of external leakage, and the intake has a heavy costing of oil inside the plenum. It’s being sucked in from the PCV valve I’m assuming.
The truck's SES light has been on for a very long time judging from the electrical tape the owner put on the dash to cover it up!
My AutoXray CodeScout 2500 can't read the ECM. Says: "Not Connected" even though the plug is securely connected all the way in and the key is on. I've confirmed the correct operation of my scanner on my '05 F-350, so I know that it's not the problem.
There are only 5 pins in the OBDII connector under the dash of this ’02 truck. That doesn’t seem correct. Any ideas?
Thanks,
Mike
With a truck that abused it doesn't suprise me that the OBD-II won't function.
You're right about the J1850 VPW connector. Here's the layout:
16=orange
14=green
5=black w/ white stripe
4=black
2=purple
Do you have any idea how to fix the OBD-II so I can read the computer?
Thanks,
Mike
Have you tried testing the individual connectors for power with a voltmeter?
I understand you're doing this as a favor. That price of this favor is really high and I would consider it a favor if the guy took his truck somewhere else. Electrical problems are a pain cause they sometimes take way too long to troubleshoot. Course this may not help your situation.
Oh one last thing. Have you checked the fuses. If I'm not mistaken the OBDII is on a fused connection.
Thanks for you help so far.
Mike
thanks
Leon
I have no clue as to what else to check, any help would be great.
It then just began working again back in march and worked fine ever since until about a week ago when I went to start it on a Monday morning(sat 2 days) and it would not start? took the other car to work and that evening it started right up. Ran it for a while and shut it off and it started right up again. Left it overnight and it has not started since? It has gone from very dry to a lot of rain and humidity lately but other than that nothing else has changes. One other thing - if it is in the "Not Starting mode" the check engine light is on but as soon as it begins to work again the light goes off?
Help - I do not want it to go to the shop for another 2 weeks and not work any better than before. By the way, the truck has 175,000 miles, been well maintained and other than this issue runs great and has a clean bill of health per my mechanic who had it for 3 weeks and shook every wire back in March.
I am befuddled
Bob Urban
I have a 1997 gmc that will not start, I have 60psi fuel for the first two seconds or 50+ while trying to start. It will start and run if you put gas, starting fluid etc.. down the intake. but will not start back unless you do the same. It has not set a "check enging light" so I don't think it would have a code bit set.
This is not the first time I have ran up on this problem, I had a similar problem with a 99 Tahoe. It would start then stall, most of the time while the air was damp. Thanks in advance for any ideas.
Lynn Davis
I'll do some more checking. I failed to mention that I removed the return line from the intake and installed a rubber hose in its place, cranked the engine over the press was 50+ psi but no gas out of the return line. That seems strange to me, I would have thought the pump would supply the gas then the regulator would let only what was needed go to the injectors and return the rest to the tank.
Thanks
Lynn
I've checked the spark, its good. I just put a new battery on and I know its getting fuel.
When I think it's just about to catch I release the key and it sputters for a bit before quiting.
Any ideas??
I have made some more checks and found two codes P0118 coolant sensor high and P0122 throttle/pedal sensor low.
I replaced the crank sensor, testing I had no 5vac. I do now but still will not crank unless you put some gas in the intake.
Do you think the cam sensor could cause it not to start?
Oh yea, I am using my spare key that is almost new. I was told if the key was worn it could be a security issue.
Any help is appreciated.
Lynn
P0122- TPS sending signal too low voltage. Could be short to ground; not securely installed; or defective TPS. This normally would cause rough/low idle and/or stalling.
I think your best bet would be to check out the ECT first then the TPS since you have the codes and the ECT could cause a no start condition.
Hope this helps.
After chasing my tail for two weeks I installed a new fuel pump and filter. It starts right up.
I don't understand why when the old pump showed 70psi when you first turned on the switch and would hole 50psi while running. Anyway, for any of you that may be having trouble like mind change the pump it doesn't cost that much.
Thanks again.
Lynn Davis
Thanks,
Shaun
PLEASE HELP!
Thanks
Dave