88 F150 Engine Trouble

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Ralph - 09 Apr 2005 01:30 GMT

Hey guys I have an 88 F150 with the 300 6 cylinder. It ran fine until
about two weeks ago when I backed it out of the garage I had two move
another vehicle so then I went to restart the F1250 and it started fine,
but as soon as I touched the acellerator it shut down. Kinda like a lean
stumble. I replaced the TPI as I was getting some irradic readings from
it. No go same problem. I haven't check feul pressure yet but what do
you guys think?

Frogman

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351CJ - 09 Apr 2005 02:07 GMT

> Hey guys I have an 88 F150 with the 300 6 cylinder. It ran fine until
> about two weeks ago when I backed it out of the garage I had two move
[quoted text clipped - 5 lines]
>
> Frogman

Damn I think I would like to see your F-1250. Is that a pickup?

On a Serious note, have you run out of fuel? I can't tell you the
number of road side assistance calls I've made when the driver swore it
was not out of fuel, yet that turned out to be the problem.

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Ralph - 10 Apr 2005 18:39 GMT

Dual tanks both full :)

>> Hey guys I have an 88 F150 with the 300 6 cylinder. It ran fine until
>> about two weeks ago when I backed it out of the garage I had two move
[quoted text clipped - 11 lines]
> number of road side assistance calls I've made when the driver swore it
> was not out of fuel, yet that turned out to be the problem.

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Frogman - 13 Apr 2005 13:35 GMT

Followup: There are No Engine codes. The thing is that it runs fine once
it is warm. It appears to be running rich when it dies. I think I'm
leaning to computer.

Any ideas?

Frog

> Hey guys I have an 88 F150 with the 300 6 cylinder. It ran fine until
> about two weeks ago when I backed it out of the garage I had two move
[quoted text clipped - 5 lines]
>
> Frogman

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TranSurgeon - 13 Apr 2005 14:13 GMT

plugged passage(s) to the IASC

Fords are bad for this

30 minutes and a can of AutoZone's best 99 cent carb cleaner

yell if you need specifics

> Followup: There are No Engine codes. The thing is that it runs fine once
> it is warm. It appears to be running rich when it dies. I think I'm
[quoted text clipped - 13 lines]
> >
> > Frogman

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lugnut - 13 Apr 2005 14:21 GMT

>Followup: There are No Engine codes. The thing is that it runs fine once
>it is warm. It appears to be running rich when it dies. I think I'm
[quoted text clipped - 13 lines]
>>
>> Frogman

I would not touch the ECM without checking for fault codes.
Since you say it seems to be rich when it dies and is
primarily when it is cold, I would suspect some other
failure like an ECT sensor, a fuel pressure regulator or the
MAP sensor. Don't forget there is always the possibility of
a loose connection or bad connector which may be indicated
by the fact it started to act up when you backed out of your
driveway which may have caused the engine to move somehow.
BTW. IIRC, the ECT and the TPS are on the same feed circuit
which may be why you saw an erratic reading there. You have
a ways to go in diagnostics before you condemn the ECM -
they are pretty damn reliable compared to the rest of the
system.

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