When I took my car out this morning and got it on the road I took it above 3000rpm and the thing started popin at the higher band. I can't figure out what would be causing this. I lowered my fuel pressure to 14psi and I am getting an SES light but I haven't checked for codes yet but I will when I get out of work. Any ideas what this would be? Thanks.



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1991 Firebird 305
Eric Natzke
"It ain't Stock"
http://members.aol.com/j007golden/91firebird.html

 

14 psi? Is that a TBI car? (throttle body injection) ..because if you have TPI 14 psi is way too low. I think the 305 TPI motors were set at 39.

Regardless, if your fuel pressure is too low the engine will lean out and detonate.(ping, sputter, cough)

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*1985 Camaro IROC-Z28 H.O. 350 A4 3.73 TPI Accel 58mm runners 24# injectors hughes 700R-4 3000 stall BFG DR's and..
*2000 Camaro Z-28 A4 3.23 MTI lid K&N Flomaster !EGR Ram Air Cutout

 

Its for TBI. So 14psi is 4-5psi above stock. But maybe I need my fuel injectors cleaned or something. I will try setting it forward just a little bit and see what happens.

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1991 Firebird 305
Eric Natzke
"It ain't Stock"
http://members.aol.com/j007golden/91firebird.html

 

I also have a brand new fuel filter I should install. That might be my problem to, you think?

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1991 Firebird 305
Eric Natzke
"It ain't Stock"
http://members.aol.com/j007golden/91firebird.html

 

Hmmm. Could be. I know I need to replace mine. I 'm actually having nearly the same problem right now....but my car was in storage for a year and a half. I think there is still some bad gas in the tank. Time to drive it out.

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*1985 Camaro IROC-Z28 H.O. 350 A4 3.73 TPI Accel 58mm runners 24# injectors hughes 700R-4 3000 stall BFG DR's and..
*2000 Camaro Z-28 A4 3.23 MTI lid K&N Flomaster !EGR Ram Air Cutout

 

Maybe back OFF of the fuel pressure a little. MAYBE it's possible that the injectors are locking yup because of too much pressure. Tis possible grasshoppaaah Goodluck!

Denny