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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

'89 f150 5.0L suddenly begins cutting out

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  #16  
Old 06-21-2012, 02:29 AM
geoasis geoasis is offline
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Yes...codes before....

....I changed the tfi indicated throttle body position and a hint at egr. After it cooled awhile ago it started fine and idled at 5500 like it was in Heaven. Could have taken it for a drive but let it sit to absorb the codes...died after seven minutes battling something. In the meantime, I had disconnected the battery for a couple of hours. Something faults at temp or else starves for fuel after awhile. I really don't want to replace the whole distributor only to be back where I am.
No one here has ever mentioned the fuel system. The pump(s) seem to prime fine as I have a 90 model with the 6 4.9L that sounds the same. (Wife destroyed transmission hauling a gigantic trailer 1500 miles). She hasn't touched this truck.
Frank
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  #17  
Old 06-21-2012, 02:42 AM
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The TFI and the PIP should both be replaced at the same time, according to the recommendations. PIP can be problematic when it heats up, then fine after cooling down. I had a stretch where I replaced three whole distributors in a week due to a bad PIP's...idle at 5500...PIP failure will leave a code, you should take a look, also a bad computer is a possibility.
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  #18  
Old 06-21-2012, 03:04 PM
geoasis geoasis is offline
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oops

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Originally Posted by geoasis View Post
....I changed the tfi indicated throttle body position and a hint at egr. After it cooled awhile ago it started fine and idled at 5500 like it was in Heaven. Could have taken it for a drive but let it sit to absorb the codes...died after seven minutes battling something. In the meantime, I had disconnected the battery for a couple of hours. Something faults at temp or else starves for fuel after awhile. I really don't want to replace the whole distributor only to be back where I am.
No one here has ever mentioned the fuel system. The pump(s) seem to prime fine as I have a 90 model with the 6 4.9L that sounds the same. (Wife destroyed transmission hauling a gigantic trailer 1500 miles). She hasn't touched this truck.
Frank
This should have said idled at 550....not 5500....ouch!!!
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  #19  
Old 08-09-2014, 11:31 PM
Ticked Ticked is offline
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I have a 1989 F150 4.9. I just got the truck. When driving it the truck runs good some times drives smooth then the check engine light will come on and the truck will begin to cut out, dog out and even want to die. The check engine light goes off and the truck will run ok agin. On start up some times it will start right up other times It will just be wanting to die on it self and the Idle is all over the place. I can't remeber the codes it pulled but it pulled up about 5 of Em. Thing I have done so far replace the MAP censer Mad sure there was a good ground I unpluged the TPC seemed to Idle better. But it runs like this at Idle rrrrrrrrrrrrrrrrrrrrrrddrrrrrrrrrrrdd. I replaced the spark plugs cap and bug and still doing it. I am almost leaning tords it being the PCM. Any Ideas.
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  #20  
Old 03-26-2015, 02:38 PM
ALANBUNTIN ALANBUNTIN is offline
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RUNS GREAT COLD AND THEN THE TROUBLE STARTS

Can anyone help - I have a 1989 F150 xlt lariet 4.9l stright 6. It runs really well till it warms up. I have replaced the following: new low pressure in tank fuel pump - new fuel filter x3 - new complete distribtor - new alternator - new battery - new plugs - Cats are clear as we dug them completely out and then welded them shut (both of them) Air flow at exhaust much improved. - - - This Trk starts and runs really strong when Florida cold. It varies how long it will run but not long then it starts to die as if it is getting fuel starved. Last time it did it I crawled under the trk and high pressure fuel pump is cool to the touch - filter was clear and I could blow through it both ways ------- ANY SUGGESTIONS???????

Last edited by ALANBUNTIN; 03-26-2015 at 02:45 PM. Reason: added some info\
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  #21  
Old 03-26-2015, 02:46 PM
ALANBUNTIN ALANBUNTIN is offline
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my email address is: AL642US@YAHOO.COM
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Old 03-26-2015, 02:46 PM
 
 
 
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