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checking fuel pressure

20streetrod06

Full Member
Joined
Oct 7, 2020
Messages
281
Location
Central IL
i've seen that fuel pressure should be 55-62 psi. is that at idle? or key on, engine not running?

is there anywhere where service manuals can be had in a PDF format?
 
After I had my new fuel pump installed, those pressures you listed are what I see when the key is turned on, whether the engine is running or not.

The problem I was having with my old pump was as soon as the key was turned off, the pressure dropped back to zero.

Now, with the new pump, the pressure stays high after the key is turned off.

Bad check valve in the old pump let the pressure drop when the pump was not running.

That caused poor starting.

But, once the engine started, the pump was able to keep up and the engine ran normally.

I'm sure it was just a matter of time before the entire pump gave up.
 
"GM eSi" is the service manuals on DVD in PDF format for all 1998-2005 GM vehicles. There is an extension that takes it up to 2009 IIRC. Try searching using Google with these terms. Needs Windows XP or Virtual Box and some tech expertise for installation. Old software ya know!

Alternatively you can get pretty much the same info for a single vehicle with a paid subscription to AlldataDIY.
 
"GM eSi" is the service manuals on DVD in PDF format for all 1998-2005 GM vehicles. There is an extension that takes it up to 2009 IIRC. Try searching using Google with these terms. Needs Windows XP or Virtual Box and some tech expertise for installation. Old software ya know!

Alternatively you can get pretty much the same info for a single vehicle with a paid subscription to AlldataDIY.
i cant find anything that "seems" like a safe download by searching for the GM eSi.

could somebody be so kind as to screenshot a view of a service manual showing the Fuel Pressure spec (to verify the 55-62 psi?)
AND also a view showing torque sequence and specs for the intake manifold bolts?

i would greatly appreciate it.
 
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