-96jeepspeed-
Spring Valley, CA
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« on: January 12, 2011, 10:31:04 PM » |
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Heres what i have, 1989 Ford F250 460efi. Had the truck for maybe a couple months or so, the previous owners were unable to get the truck running, they got frusterated with and left it in thir front yard for almost 2 years, never touched it. I came by one day bought it from them, hooked up a fuel line that was disconected and drove it away. Been running great up untill 2 weeks ago. Huge power loss, very bad idle and usally will stall, but is smooth in higher RPMs. I replaced the TPS, fuel pressure regulator, dist. cap or rotor, wire plugs, motors pulls a solid 25psi of vacume. timming is set to factory specs. Still runs like crap. Any advise?
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dezertcrawlin
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Home Fabber
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« Reply #1 on: January 12, 2011, 10:41:21 PM » |
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Vacuum leaks? IAC?
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BRO-DOZER MOTORSPORTS
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HEEP4me
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BRONCO PEAK
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« Reply #2 on: January 13, 2011, 07:44:39 AM » |
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My 4.3 chevy had the IAC go bad and acted similar.
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EVERY DAY COULD BE A JEEPIN DAY!!!
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yotarunner
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Oceanside
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« Reply #3 on: January 13, 2011, 08:28:43 AM » |
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Check fuel pressure and fuel filter. Check air filter and the vacuum line that goes to the MAP sensor. Another possible cause is the ignition module and stator. Does it have duel fuel tanks? Sometimes the fuel seperator will leak or bypass fuel pressure. The IAC will cause stalling, low and rough idle but not a power loss.
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85 4Runner, 4" lift, 35 BFGs, Detroits front & rear, 5.29 gears,V6 rear with a rebuilt 22RE.
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moorehouse77
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Dave... FSJ the other Jeep!
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« Reply #4 on: January 13, 2011, 08:42:48 AM » |
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After sitting that long I'm wondering about fuel pressure. Maybe clogged fuel filter???
dave.
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-96jeepspeed-
Spring Valley, CA
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« Reply #5 on: January 13, 2011, 02:34:11 PM » |
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Hmm thanks for the info guys. It does have 2 fuel tanks, and now that i think about it if i park on a very steep downhill and rear fuel tank does leak from the top of the tank. But none of the lines leak when its running. Dave, all the fuel filters were replaced when i bought it although when i hit the vavle on the fuel rail nasty yellow gas shot out, but iv had atleast 5 or 6 tanks of clean gas ran threw it. But ill check the filters aways.
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yotarunner
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Oceanside
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« Reply #6 on: January 13, 2011, 02:53:26 PM » |
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Sometimes those fuel selector valves on the frame rail will go bad and cause fuel to pump from the front tank into the back tank or back to front. Does it run any different running on the front tank vs the rear tank.
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85 4Runner, 4" lift, 35 BFGs, Detroits front & rear, 5.29 gears,V6 rear with a rebuilt 22RE.
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-96jeepspeed-
Spring Valley, CA
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« Reply #7 on: January 13, 2011, 03:00:04 PM » |
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No, its the same either tank.
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yotarunner
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Oceanside
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« Reply #8 on: January 13, 2011, 03:23:13 PM » |
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I'd check the fuel pressure anyway, just to make sure. The MAP sensor and vacuum line to the sensor from the manifold are also possible causes.
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85 4Runner, 4" lift, 35 BFGs, Detroits front & rear, 5.29 gears,V6 rear with a rebuilt 22RE.
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Mikegyver1
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760 Ramona, CA
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« Reply #9 on: January 13, 2011, 04:05:19 PM » |
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My buddy had an 89 bronco that would go through Ignition Modules, once every two years or so. He hated it.  Dealer couldn't figure out why either... ford  Check this link and see if this is what your experiencing.. http://www.ehow.com/how-does_5023948_troubleshooting-ford-ignition-module.html |
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What's on the other side? Maybe we should look first. (Na' it will give us something talk about later)
Mike
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-96jeepspeed-
Spring Valley, CA
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« Reply #10 on: January 13, 2011, 04:50:39 PM » |
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I know mike, But truck was cheap. If i cant get it running right in a month or so ill get rid of it and try to pick up a 1st gen dodge cummins.
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wiebewagon
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« Reply #11 on: January 13, 2011, 05:15:06 PM » |
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hopefully it will work out for you, if not those dodges are sweet motors.
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Mikegyver1
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760 Ramona, CA
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« Reply #12 on: January 13, 2011, 05:15:20 PM » |
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LOL, I'm not picking on you Ted... all vehicles have something retarded about them.. Even the Dodge (just keep the credit card on file)
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What's on the other side? Maybe we should look first. (Na' it will give us something talk about later)
Mike
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-96jeepspeed-
Spring Valley, CA
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« Reply #13 on: January 14, 2011, 04:00:26 PM » |
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This thing is also running to rich. Lottsa black smoke at idle. What the hell can it be.
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HEEP4me
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« Reply #14 on: January 14, 2011, 06:46:40 PM » |
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If it runs rough at idle its probably the iac unit... Have you checked it. They are pretty cheep for chevys.
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EVERY DAY COULD BE A JEEPIN DAY!!!
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-96jeepspeed-
Spring Valley, CA
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« Reply #15 on: January 14, 2011, 09:35:41 PM » |
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If it runs rough at idle its probably the iac unit... Have you checked it. They are pretty cheep for chevys.
I took it apart and cleaned it, but im not sure if it even works. |
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yotarunner
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Oceanside
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« Reply #16 on: January 14, 2011, 09:59:14 PM » |
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The IAC will cause it to run rough at idle but won't cause it to run rich or cause black smoke. The fuel pressure regulator will cause it to run rich and have black smoke, so will the MAP sensor. Have you checked the fuel pressure, or the MAP sensor?
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85 4Runner, 4" lift, 35 BFGs, Detroits front & rear, 5.29 gears,V6 rear with a rebuilt 22RE.
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-96jeepspeed-
Spring Valley, CA
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Factory Sponsored Pro-Crawler, expect Catastrophic Body Damage
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« Reply #17 on: January 15, 2011, 05:45:13 PM » |
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Just replaced the map with a used one, No change. If i cant figure in a week or so, its going to the scrapper.
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Zombie Rights Today! Because Zombies have Feeling too.. They Feel like eating you brain.
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-96jeepspeed-
Spring Valley, CA
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« Reply #18 on: January 15, 2011, 06:24:49 PM » |
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anyone have a good used IAC laying around? I took mine apart and cleaned it and it ran the same.
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99xj
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Don't talk about it...Let's go wheeling!
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« Reply #19 on: January 17, 2011, 05:15:52 PM » |
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Did you get your truck running ?
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99 Cherokee, Rubicon Express bastard Lift , 2.2 DT Remote Reservoir Shocks, HP-D30, alloys, 8.8 and a bunch of other stuff!
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