I have a recently purchased 1990 Bronco. When I first bought it I had a miss after I drove it a few miles. I changed plugs,wires,cap,and rotor button and it ran great.By the way it has a 94 302 in it. My problem is, I decided to clean the engine and while I was cleaning it started running rough and shut off. It will not stay cranked unless I keep it running at about 1000 rpm and it is still very rough. When I rev the engine to 3000 or so it sounds ok. I checked the cap,plugwires,etc. everything looks fine. I also looked for a vaccum line but all seems well. Could the coil cause this? Any help would be appreciated.
Jeff
I Need Help
Started by
Guest_wcchmp88_*
, May 19 2004 01:13 PM
8 replies to this topic
#2
Shadow_D
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F-Series Pimp
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Posted 21 May 2004 - 05:28 AM
Welcome to the "B" Zone!
I would say the best thing to do is finish the tune up. I say this because people always seem to forget the O2 sensor, PCV, and coil.
See how it runs after you change them and let us know.
I would say the best thing to do is finish the tune up. I say this because people always seem to forget the O2 sensor, PCV, and coil.
See how it runs after you change them and let us know.
90 Bronco Full Size
Police Package
351W
E4OD
31" Tires
Going through a complete restore
http://fullsizebronc...ail.php?id=1650
Police Package
351W
E4OD
31" Tires
Going through a complete restore
http://fullsizebronc...ail.php?id=1650
#5
Guest_Guest_*
Guest_Guest_*
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Posted 23 May 2004 - 02:44 PM
That being the case, I would check the lines in the control circuit for the EGR. If you don't have a Ford EVTM get a Chiltons. You probably either knocked something loose or got water in something. On your truck, the EGR is computer controlled via the EGR Solinoid which controls vacuum to the EGR valve when required. This recycles small amounts of exhaust gasses back in to the combustion system under set conditions to reduceNitrous Oxide. The ECC looks at temp, rpm, throttle opening aswell as a sensor on top of the EGR that tells how far the EGR is open. With these inputs the ECC controls the amount of vacuum to the EGR by adjusting the amount of vacuum to the EGR.
Good Luck,
Good Luck,
#6
Seabronc
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F-Series Commander
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Posted 23 May 2004 - 02:50 PM
PS the EGR valve should only operate at the part-throttle mode, it should be closed at th cranking mode, the closed throttle mode, and the wide open mode.
Good luck,
Good luck,
"I know you think you know what I said, but what you need to know is, I did'nt say what I meant"
#7
Shadow_D
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F-Series Pimp
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Posted 29 May 2004 - 10:04 AM
The coil is the last thing I replace. If it seems to run bad after a tune-up I replace that and that seems to fix it.
90 Bronco Full Size
Police Package
351W
E4OD
31" Tires
Going through a complete restore
http://fullsizebronc...ail.php?id=1650
Police Package
351W
E4OD
31" Tires
Going through a complete restore
http://fullsizebronc...ail.php?id=1650
#8
Justshootme84
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F-Series Commander
- Location:Palacios, TX
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Posted 29 May 2004 - 09:12 PM
If you wash the motor and get ANY water in the alternator, things can go awry. I think that is the source of your problems.
1984 Bronco XLT, 351W H.O., C-6 AT, Ford 9", SkyJ 6" lift, 35" tires on MT Classic rims, S&W Racecars 10-pt cage kit, custom "shaker" assembly.
1988 Bronco Custom, 302 EFI, C-6 AT, Ford 8.8". parting out
1986 Bronco Custom, 300I-6, NP435
1988 Bronco Custom, 302 EFI, C-6 AT, Ford 8.8". parting out
1986 Bronco Custom, 300I-6, NP435
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