On Wed, 11 Apr 2007 19:38:41 -0500, Robert W Hughes
<rwhughe@[EMAIL PROTECTED]
> wrote:
>Serial # 19781010 wrote:
>> 1985 Fiero GT 2.8L
>>
>> First noticed problem/change: I have to crank the engine 3 times
>> before it will start. It was starting on the first cranking of the
>> engine.
>>
>> Second problem/change: I locally drive to somewhere, park and turn
>> off the car, short time afterwards, engine still hot, I try to start
>> and it acts gas starved, putt-putt-putt, give more gas,
>> putt-putt-putt, sometimes would fire up and run, sometimes not.
>>
>> I can start and run the car short distance and not notice any problem
>> other than the starting on 3rd time cranking the engine.
>>
>> ECM Error Codes: 13 oxygen sensor and 44 lean mix.
>>
>> I am going to replace the oxygen sensor with a new one tonight.
>>
>> I hear the fuel pump come on for 2 secs after ign key turned to on.
>>
>>
>> What else could be causing the lean mix condition?
>
>You might want to check fuel pressure, fuel pumps don't last forever.
>The V6 fuel pressure is referenced to the manifold absolute pressure. At
>idle you would expect around 30psi, quick opening of the throttle should
>cause it to jump to close to 40psi. Just turning on the key without
>cranking should give 39-40psi and this should not bleed off rapidly.
>
>
>
>--
>Robert W. Hughes (Bob)
>BackYard Engineering
>29:40.237N, 95:28.726W or perhaps 30:55.265N, 95:20.590W
>Houston, Texas "The city with too much Oxygen"
>rwhughe@[EMAIL PROTECTED]
for the info.
Sorry for my delay. My news reader program stopped working.
I put a pressure guage on and get only 15 psi at idle. Appears it is
certain my problem is fuel pressure related.
I had replaced the fuel filter 3 months ago, but need to check it to
make sure it is not clogged.
There is a test for the fuel pressure regulator, like putting 10psi
va***e to it and observing what happens to fuel pressure.
I suspect your right about the fuel pump, I just want to be sure
before getting into that. I can hear the pump running, but does that
mean anything?
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