Sputters ..

[standard235]

TEST your fuel pressure. That's how I discovered my regulator was bad.

[FestYboy]

grab your tester, "T" it into the fuel line right before the rail input. idle with the regulator in proper working order should get you 34-36 psi. pulling the vac line off the regulator while running should net you 50+ psi. if you find that the pressure starts to drop off while idling, remove the fuel filter from the equation and retest. also, when you shut off the engine, you should be able to maintain at least 20 psi for several minutes, if you don't, you may have regulator bleed-down or have a faulty check valve on the pressure side.

[Dom]

grab your tester, "T" it into the fuel line right before the rail input. idle with the regulator in proper working order should get you 34-36 psi. pulling the vac line off the regulator while running should net you 50+ psi. if you find that the pressure starts to drop off while idling, remove the fuel filter from the equation and retest. also, when you shut off the engine, you should be able to maintain at least 20 psi for several minutes, if you don't, you may have regulator bleed-down or have a faulty check valve on the pressure side.

Ok sounds good I am going to try to pick one up tonight and try this test .. Thanks

[standard235]

If you have an AutoZone nearby, the kit they have for $150 to rent lets you T in. I didn't even rent it, used it in their parking lot with a screwdriver and needle nose. Very simple procedure. I had 28psi with or without vac hooked up AND bled down to like 5-8 psi when shut off.

[Dom]

Which vac line do I disconnect , connect?

[FestYboy]

the vac line to the fuel pressure regulator. it sits at the end of the fuel rail on the driver side.

[Dom]

the vac line to the fuel pressure regulator. it sits at the end of the fuel rail on the driver side.

Thanks

[Dom]

the vac line to the fuel pressure regulator. it sits at the end of the fuel rail on the driver side.

Sorry ,, I can't seem to locate the regulator.. ?

[ckiesman]

It should be there. It looks like this:

93457.jpg

with the long metal tube going to a rubber line and the small line going to a vacuum line. And the 2 bolt holes bolt the the fuel rail with that thing in the center going directly into the rail. Unless its different for the 89 auto. I thought they were fuel injected.

[Dom]

It should be there. It looks like this:

[ATTACH=CONFIG]11972[/ATTACH]

with the long metal tube going to a rubber line and the small line going to a vacuum line. And the 2 bolt holes bolt the the fuel rail with that thing in the center going directly into the rail. Unless its different for the 89 auto. I thought they were fuel injected.

ok found it thanks ,, didn't think it was that small

[ckiesman]

lol. Glad I could help.

[Dom]

lol. Glad I could help.

Its one thing after another .. i was just saying wow its starting to drive good,,that was short lived.lol

[ckiesman]

lol. It happens. Thats the way mine is. Wheel bearings this week, messed up VAF the next. Its all in the fun of it, lol.

[Dom]

I wanted to take it to autozone to check the fuel pressure but it was sputtering way to bad . Will have look more into tomorrow

[XFSE71]

I test fuel pressure with a simple guage setup.
a couple of clamps and a piece of fuel hose. EFI should be 40psi KOEO and not leak down faster than 1 PSI/min.