Rust on fenders?

[exp500]

Continuing on the spider injection thing if you have a fuel pressure test gauge hook straight to the fuel rail schrader valve and there’s a PSI range if memory serves you need 53 psi at the rail to fire the injectors so leaking fuel lines (rust zones) failing fuel pump or filter/ bad pump harness among other things may mis-diag a spider injector

60-66# per FSM.

 

[LordWayback]

60-66# per FSM.

I don’t know where you got that number but maybe that’s for wot

 

[exp500]

I don’t know where you got that number but maybe that’s for wot

Show me!

 

[exp500]

I don’t know where you got that number but maybe that’s for wot

Long ago I linked you to FSM, and yet you continue.....

Missing back fire

asking for help with missing back fire on my 97 gmc Yukon 370,000 miles 4x4 tried new fuel pump and filter no help also there is no engine light coming on. Fuel pressure is 50 to 55 . My next move is to replace plugs wires and cap . It starts up perfect and ideals prefect and while in...

www.tahoeyukonforum.com

 

[LordWayback]

Show me!

You just need 52-53 psi to run anything less is a problem I’ve heard from 52-63 from the GM service manual the guy had asked what the minimum fuel pressure was not the entire range