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-   1992-1999 (https://www.gmforum.com/1992-1999-91/)
-   -   94 L27 Fuel Pressure? (https://www.gmforum.com/1992-1999-91/94-l27-fuel-pressure-242582/)

ELMACHOGERACHO 09-09-2006 10:28 AM

i kno, i was just givin him shit

bandit 09-09-2006 11:42 AM


Originally Posted by ELMACHOGERACHO

Originally Posted by bandit
yeah always let it run for a few seconds, befor i start it/

explain?

Fuel pump, if you read wilwrens post above that oen it will make sense. ;)

bandit 09-09-2006 11:45 AM


Originally Posted by mrbell83

Originally Posted by willwren
Fuel pressure gauge attached to the pressure fitting on the fuel rail, mrbell.

Oh, ok so I just have to go and but a gauge and undo that cap? Are there any specif instructions? Mine just acts finny at idle sometimes and I would like to know of its a vaccum leak or maybe low fuel pressure.

Thanks Bill

When you get the Gauge it will having instructions in it,
But this is how it goes, Screw gauge onto the fuel rail, turn the Key to on, Bleed out the air, check for leaks(Gauge), Start car, Bleed more air out, then watch the gauge, see what it reads. Reve it up and hold it a few times...

If you want a pics of the Gauge let me know ill post some. :)

Cheetah 09-09-2006 12:44 PM

Post the pics Bandit! :D

bandit 09-09-2006 01:03 PM

well im at work now. ill post some later. :)

BillBoost37 09-09-2006 02:58 PM

Why are we mentioning the incorrect way to test fuel pressure?

FSM says put gauge on, turn key on and off, bleed air... then turn key on and off a few times to reach maximum pressure. Watch gauge for 10 min to see if any bleed down occurs.

Says nothing about starting car. If you have issues at higher rpm..then I suggest lengthening the hose and watching FP while driving.

bandit 09-09-2006 03:03 PM

doesn't it show the fuel presure while its running? i mean i dont see how there would a big diffrence when reving in the drivway and reving while driving. its fuel doen't it stay around the same at all speeds, just changes a little depending on the throttle %?

bandit 09-09-2006 03:28 PM

Wilwren- You know now that i think about it, i do rember a few times like 2 months ago when i didn;t wait 2 sec to start it and it did take a longer time to start....


Boosty- Yeah i also did it that why , it only got up to 40...

BillBoost37 09-09-2006 07:14 PM

And at 40.. it's within an acceptable range. If you suspect further problems.. drive and watch FP.

VigCS 09-09-2006 09:09 PM

Wow thats nuts. My mustang idles at 32 and spikes to 39 while revving...thats with a new fuel pump.

Hehe, the differences are funny :)


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