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I parked it one night and the next morning I went to start it and it will crank but not start. I sprayed ether in the air intake and it started right up but would only stay running if I had the pedal floored. I checked the spark and it was good. Both tanks are coming on. I hooked fuel pressure gauge up and its reading 55 with the key turned. I changed the fuel pressure regulator, fuel filter, air flow sensor, and injectors. And still it wont start. I checked the timing and its good. I put fuel treatment in the gas and still nothing. Checked all my relays and fuses and theyre good. Then I realized my file pumps weren't shutting off with the key turned. So now can someone please help with what is going on. I'm going crazy
This is just a guess, but have you checked the throttle position sensor?
Sam
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1973 F250, 390 4spd 7500 lbs GVWR, known as "Grumpy" a name well earned
1992 Dodge D250, 12v Cummins, "Babe the Big Blue Ox"
next project: 1966 Mustang 200 3spd- sat for 15 years!
"Man does not control his own fate. The women in his life do that for him." - Groucho Marx
I parked it one night and the next morning I went to start it and it will crank but not start. I sprayed ether in the air intake and it started right up but would only stay running if I had the pedal floored. I checked the spark and it was good. Both tanks are coming on. I hooked fuel pressure gauge up and its reading 55 with the key turned. I changed the fuel pressure regulator, fuel filter, air flow sensor, and injectors. And still it wont start. I checked the timing and its good. I put fuel treatment in the gas and still nothing. Checked all my relays and fuses and theyre good. Then I realized my file pumps weren't shutting off with the key turned. So now can someone please help with what is going on. I'm going crazy
There was a post similar to what you've got going on a couple of months ago.
Yea I'm wondering if it may be the ecm. Do they just quit like that? Now that I remember it was idling crappy. Kinda sounding like it wanted to die but with alitle press on the pedal back to normal. Never would die.
AND PAY ATTENTION TO THIS:"What you see is the typical electrolytic capacitors leak, causing intermittent shorts/opens to the neighboring circuits/components and symptoms as the ones explained. Worst case scenarios with this type of failure, is a permanent no start and permanent damage to the PWB"
Unless you're independently wealthy and can throw unlimited cash at your truck, I'd suggest you check your 20+ year old ecm that has probably seen better days.
Good enough ?????
Bob
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94' F-150 300 I6 EFI 4X4
Last edited by Truckin Bob; 03-09-2012 at 02:11 PM.
Reason: spelling correction
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92 inline 6 wont start for anything
