hi, i am haveing a serious problem with my 89 Trans Am GTA. the car died, so i had the heads re-done (i was told that was the problem). after i re-assembled everything, i went to start it up and it sort of runs, but it will die if i let off the gas. also it runs really rough. ive re-set the timeing 5 times now (#1 cylindar at TDC, rotor pointing bettween #1 and #8 posts on distributor cap) and it still runs like crap. now its "possible" the rocker arms may be a little loose, and not set to zero lash, but they sound fine. ive checked almost everything i can think of and i dont know what to do. when i tryed to set the valves to zero lash acording to the books, some of the valves still were a tiny bit loose, so i re did it a few times and the same results happend so i asumed i did it correctly. if the valves are even slightly outa sync, could it screw things up that badly? could it be the fuel injectors? im like outa ideas, time and money so i gota figure this out quickly. any help would be GREATLY appreciated. thanks

 

im having a similar problem with idle and stalling,and someone suggested to me to perform a fuel pressure leakdown test on each cylinders injector with a fuel pressure gauge and then ill know how my injectors are.Maybe someone here can help you out and tell you how to do this test cause i have yet to do it and im still not sure how to.But id look into the injectors.

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86 Trans Am 305 TPI,Bored 30 over,Blower Cam,Fordged Racing Pistons,High Volume Oil Pump,3" Flowmaster Exhaust,Hypetech Coil,Acell 300+ Race Wires,Bosch Platinum +4 Plugs.Best Et was 12.5 with a Paxton.

[This message has been edited by 86TransAmTPI (edited October 19, 2001).]

 

did you check for a vacuum leak? best of luck, tom

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86 iroc 305tpi auto. mild cam

 

the valves will still seem loose after the lifters bleed a little bit (you have hydralic ones). you should make sure you set the timing with the EST wire disconnected and without any performance ignition used either. I had a he** of a time this summer with mine running rough after a head swap and it turned out the ignition was screwwing with my timing light.

 

possible mas air flow sensor malfuncion?, im having a similar problem with my 85 tpi trans am, sometimes when going up on stop lights it stalls and it likes to idle real low and stall, im replaceing a maf soon

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1989 pontiac firebird
bright red exterior(just repainted)
grey interior
5 spd
305 TBI (stock)
WS.6 formula wheels
3.73 posi rear end
http://members.aol.com/j007golden/Mikey89.html
http://www.geocities.com/firebird/myfirebird.html
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1985 trans am
factory bright yellow
4 wheel disks
16 inch wheels
305 TPI
power antenna and mirrors
t tops