Diagnose the issue anyone?

Post by **erikv11** » 20 Jul 2023, 11:06

I didn’t mention this earlier in the thread because it didn’t fit the order of what I checked but Neil and now Chuck too for the win: when it got really bad I finally checked fuel pressure, steady 15 psi.

Swapped fuel filter, no change. Fortunately I have a couple spare fuel pumps from the junkyard. So I pulled the fuel pump.

Post by **erikv11** » 20 Jul 2023, 11:08

Post by **misha** » 20 Jul 2023, 14:24

Feed line clamp from pump to housing got loose ...or short in that wiring?

Post by **abscate** » 20 Jul 2023, 14:28

Lets take a look for a bright blue spark at a plug grounded to the top of the head to rule out an aging coil. Those can go wonky on you as a function of time and temperature.

Oh my.

Time to break out the

OETIKERS!!!!

Post by **abscate** » 20 Jul 2023, 14:32

Neil/Chuck for the win...

+1 on the above, but also check fuel pressure

Post by **scot850** » 20 Jul 2023, 15:00

+ 1 to Chucks great suggestion of smoke tester. Save a lot of crawling about and random searching if it is pressure or vacuum related.

Neil.

Post by **Chuck W** » 20 Jul 2023, 15:51

erikv11 wrote: 20 Jul 2023, 11:08 IMG_3294.jpeg

I ran into this SAME issue on the '96 GLT I had. It would just randomly run rough and want to die, no power, etc. Other times run great.

Found this when I pulled the pump.

I was going to suggest this earlier, because it sounded just like my problem. (I blame being busy at work trying to fix a work machine problem)

Post by **scot850** » 20 Jul 2023, 16:29

Is that the correct clamp type? Oetiker would work better than that or a proper fuel pipe clamp.

Neil.

Post by **misha** » 20 Jul 2023, 17:20

That's a factory clamp.

Post by **abscate** » 20 Jul 2023, 19:04

The Kat has trained me on connecting rubber hoses to straight pipes

Roughen , flare end, use glue on the bond.