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Old Jan 27, 2010 | 02:09 PM
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Default Help please!!!!!!!

i have a 91 f-150 5.8 auto w od.4x4. it will start and idle just fine,even sounds really good,but when you give it gas it will spit -n- spudder and die. cannot drive it at all.now for things that have been replaced or cleaned.maf sensor,replaced.iac solenoid,took apart and cleaned.fuel pressure reg.,replaced.fuel filter,tps,coil,plugs,plug wires,all replaced.egr seems to working,has stong vacum on it.throttle body too off and cleaned.timing has been checked and was fine.just put a new computer on it so i couldnt get any codes before i wrote this.if anyone has any more sugg.please,please let me know.i really am at wits end.thank you guys
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Old Jan 27, 2010 | 02:10 PM
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ok finally got some codes.1st part-26,67,99 ---2nd part-67 then repeated 67 again. at the first of each flash seq.on the 1st it flashed twice real quick and on 2nd one it flashed one then the 67 twice
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Old Jan 27, 2010 | 02:36 PM
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Originally Posted by roninbrad
ok finally got some codes.1st part-26,67,99 ---2nd part-67 then repeated 67 again. at the first of each flash seq.on the 1st it flashed twice real quick and on 2nd one it flashed one then the 67 twice
26= MAF sensor curcuit fault. After replaceing a MAF, you should disconnect the battery for 5 minites to clear the KAM (Keep alive memory)? 67= NPS open curcuit. Operator error during test. Clutch pedel not pushed in. 99= Electronic pressure control curcuit failure. Transmission related. Deal w/ the MAF, clear the KAM & put some miles (10-20) on it before retesting. Your post is a little hard to completely understand, but I really like your avitar!

Last edited by ymeski56; Jan 27, 2010 at 03:02 PM.
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Old Jan 27, 2010 | 04:13 PM
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sorry bout last post,I was in a real hurry.this truck has me going crazy.I have changed about everything i know to change.it will start and idle just fine but when you go to give it gas,like taking off or driving,it will miss real bad and just die.sometimes it will pop back thru the air box,not everytime tho.loking for the place i got the avitar,they have all diff. kinds of trucks.will post it when i find it.
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Old Jan 27, 2010 | 04:19 PM
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Originally Posted by ymeski56
26= MAF sensor curcuit fault. After replaceing a MAF, you should disconnect the battery for 5 minites to clear the KAM (Keep alive memory)? 67= NPS open curcuit. Operator error during test. Clutch pedel not pushed in. 99= Electronic pressure control curcuit failure. Transmission related. Deal w/ the MAF, clear the KAM & put some miles (10-20) on it before retesting.
You want to discuss this?
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Old Jan 27, 2010 | 04:32 PM
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I can't stop staring at that Avitar. I keep waiting for it to drive off my screen!
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Old Jan 27, 2010 | 04:35 PM
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YES!! ido want to discuss anything to do with this truck
i replaced maf sensor,unhooked batt. to do it. nothing changed at all.i am unable to drive it to set any codes.what can i do from here,any sugg. will be apreciated greatly.

Last edited by roninbrad; Jan 27, 2010 at 04:42 PM.
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Old Jan 27, 2010 | 05:07 PM
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Originally Posted by roninbrad
YES!! ido want to discuss anything to do with this truck
i replaced maf sensor,unhooked batt. to do it. nothing changed at all.i am unable to drive it to set any codes.what can i do from here,any sugg. will be apreciated greatly.
The KOEO (key on engine off) scan doesn't require driving. what does that show?
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Old Jan 27, 2010 | 05:36 PM
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26,67,99,then a long pause,then67
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Old Jan 27, 2010 | 05:43 PM
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Originally Posted by roninbrad
26,67,99,then a long pause,then67
It won't try to start w/o the clutch depressed will it?
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