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#1
01-12-2008, 08:24 PM
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Doug,
Do you think it's a fuel pressure issure? I had problems with the wife's car...progressively hard starting that worsened with time, and it was running rough. I thought it was the fuel pressure regulator, or a stuck injector, but she took it to a local shop that we trust and they couldn't figure it out. Turns out it was the FPR.
__________________
Mike '82 SSP (Marketing Order) '83 Colorado State Patrol #202 '83 Texas DPS '85 Florida Highway Patrol #1422 '93 Florida Highway Patrol #1187 '93 Florida Highway Patrol #1363 
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#2
01-13-2008, 01:13 AM
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Maybe???
If I had to guess I would say the pcm is not turning on the 3 sec prime to the fuel pump. This is controlled by the distributor. the pickup coil sends signal through the module to the to the pcm relay which in turn grounds the fuel relay for 3 sec prime until it sees rpms, I would say you are not getting this. Make sure the distributor is tight, otherwise it will not ground and turn on either relay. Meaning if it is loose in the block it may not ground. My suspect would be a bad pickup coil in the distributor, because this, not the E-coil is what usually kills the TFI module. First I would test the fuel pump relay for the prime signal, it is a green housed relay next to the brown pcm relay. These relays, are either next to the PCM or under the drivers seat I believe. I would check for a prime signal and power there and if present i would either replace the relay or take the cover off the relay and manually engage it. if the pump fires and the car starts, and If all the variables are there then I would say you have a bad realay. If there is no prime signal I would head to the distributor where you have already been. Like i said earlier make sure that the distributor is tight if it is not then the TFI and the pickup may not be getting the ground they need to make things happen. Otherwise i would bet on the pickup in the distributor. Let me know if I can help on anything.....
FRED ASHMORE
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#3
01-14-2008, 12:34 PM
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When you turn the key to the run position do you here the fuel pump kick on? If not it could be a fuel pump, the relay for the fuel pump or the PCM.
Make sure to check that all the gorunds are good. Good luck, Matt
__________________
2007 Mustang GT Fun loving 1988 5.0 Ranger! 1964 Fairlane 500 2 door post (GR350)
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#4
01-15-2008, 06:11 PM
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I replaced the relays, distributor, & processor with known good parts & still the same, won't start unless you shoot some gas into the intake. The relays are working, you can here them click. Fuel pump works fine. It just won't start on it's own. It's got me stumped. Doug
__________________
1986 CHP 3705 -- 1989 Minnesota State Patrol
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#5
01-15-2008, 06:35 PM
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Quote:
Matt
__________________
2007 Mustang GT Fun loving 1988 5.0 Ranger! 1964 Fairlane 500 2 door post (GR350)
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#6
01-15-2008, 10:52 PM
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Maybe???
Try slight throttle and see if it starts?? if it does then that means it needs a tps. A tps will shut off the injectors at cranking if it is out of range. Then when you prime it or give partial throttle it changes the range and allows them to fire. I have had this happen before as well. keep posting and I'll keep trying to get it fixed. The one thing i hate about ford diagnostics is you cant display the data before 96....
good luck FRED ASHMORE
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#7
01-16-2008, 01:26 PM
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Quote:
__________________
1986 CHP 3705 -- 1989 Minnesota State Patrol
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