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Old 08-20-2014, 07:25 AM
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Starting Problem Please Help

Hey guys I dont really work on many 7.3's but i have a buddy with a 97. The truck ran fine. He took it to O'reillys because it had a check engine light. They said it was his glow plug relay. He put the relay on and now the truck no matter what has 30 sec. crank time. Hot or cold. The truck runs perfect at idle and going down the road. It does not have a rough idle either.

Could you all please help me out!
Thanks
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Old 08-20-2014, 02:37 PM
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I didn't think a bad GPR set the CEL…. hrmm.
Was this a problem prior to the new GPR?
Have you checked the wiring to the new GPR?
It's likely the top notch scanner the very well trained parts store employees used can't read the diesel PCM properly.
Did you Check all fuses?
Do you notice a voltage drop on the volt gauge when the key is turned on but before you crank? mine typically drops below "N" in normal. If not, your glow plugs are not being energized.

Maybe stop cranking for 30 seconds at a time, thats really hard on the starter and batteries…..
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Old 08-20-2014, 02:40 PM
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We put a new GPR on the truck the one that was bought at Oriellys was bad. Still having the problem though. We have the HPOP out of the truck right now and was going to purchase the seal kit form International but all of the seals look good.

Do you guys think this could still be the problem or need a whole new HPOP? Like I said the truck runs great once it fires off!
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Old 08-20-2014, 05:25 PM
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u need to get a code reader on it
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Old 08-20-2014, 06:38 PM
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these motors are NOT the ones you want to spend your money throwing random parts at.

you'll go bankrupt before it's fixed
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Old 08-20-2014, 07:16 PM
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Very unlikely O'Reilly's could even have scanned the truck. As said, get a code reader on it, but more specifically, one that's known to be capable of communicating with the OBS PSD.

ONLY California trucks can throw any codes related to the GPR, and as is the case with ALL codes, ALL vehicles, the code references the part REPORTING the error, which is NOT necessarily the part (if any) at fault. But stores like O'Reilly's and AutoZtoned like to scan your vehicle, _interpret_ the code(s) (rather than giving you the codes themselves for you to research yourself), and handily interpret them in ways that reference parts that, oh golly, they just happen to stock.

Classic definition of a racket. Always, ALWAYS, when using such "services", with ANY vehicle, just get the code(s) and do your OWN research. In this case, the GPR you bought was probably your typical FLAPS relay that doesn't have the duty rating to run our glow plugs, for the time period our PCMs are programmed to run them.

Why did you remove the HPOP? If the truck runs well once it's started, it's extremely low on the suspect list.

Put the truck back together and start TESTING. The above statement about throwing parts at the problem applies to ALL vehicles; it just goes doubly so with these ones.
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Old 08-21-2014, 06:53 AM
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Well ive had a SnapOn Modis hooked up to it. From my knowledge all of the pressures and readings are correct. Iam so lost on this truck. Thankfully its not mine but i feel for the person that it is. They messed with it for a couple days before bringing it to me.

The thing that gets me about it is that it runs so great once it starts and dosent sputter or anything. No rough idle once it finally starts either.
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Old 08-21-2014, 09:29 AM
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Use the Modis to get the DTCs.
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Old 08-21-2014, 01:38 PM
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you can also use the snap on to get live data that will also tell you the health of the systems
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