I've started experiencing at the beginning of this week. It isn't on any particular RPM (i drive 500-2500 tops)that this happens. Its worst at 30mph when I'm in 3rd gear (I now have 3.73s so I can hit 4th doing 25mph).

I'm leaning more towards the fuel pump going bad, but it maybe the car is leaning out on me with it needing to work harder to make the car go normal speeds. I'm also thinking the distributer module is going bad. The cap and rotor only have 5,000 miles on them, but the module is original with 115,000 on it.

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Member of the Jersey F-body Association (JFA)

1989 Camaro Convertible RS
Gunmetal gray w/black top
305tbi, auto, 3.73 posi
SLP exhaust, 16x8 black GTA Crosslace Rims
Check out Phil's Rice Boy Page

 

After 2500rpm what happens?

Steve

 

Fuel pump... went through that three times

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~Luke a.k.a. pianiy
'91 Firebird :: 305/TBI/700R4 ::
Mods: Catco cat - B&M Shift kit - TA tail lights - GTA rims - K&N - MacEwen guages
Stereo: Pioneer DEH-P8200R - Pioneer 6x9's - Kenwood 8" Tube
::R.I.P.::'87 Firebird - Firebird parts - Selling an '80 Firebird for a friend
Moderator of tranny board over at TransAmGTA.com

 

Sorry, but I refuse to drive my car over that unless I'm at the track which I haven't been for a couple months. Its my baby and I drive it as slow as possible on the streets.

I was leaning toward the fuel pump as being the likely suspect with the luck I've had with them in my last F-body. I went through 3 in 4 months with my GTA.

Another bit of info I just thought of, It only does this when its being driven around, when its parked and I rev it up, it doesn't do this. But I also know you need more fuel to enter the carb portion to drive it around.

 

2500rpm? It's been months since 2500 rpm? daaaaammmmmnnnnn.

My friend's S10 is doing something similar. I think it's his injectors, but it's a 2.2l multiport so it's kinda like a miss when it does it. His will do it at idle if he hits the gas fast enough, it does it more on the road because the rpms can't match the pedal position as fast I guess.

You say your thinking it could be the module, could I ask you a question, where are the module's on a TBI car?



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1989 Pontiac Firebird Formula LO3 Auto
-180 degree stat
-Hooker Cat-Back
-velcro t-top bag
-Wonder Bar from my IROC
Waiting for install: Open element 14x3, 95 vette lt1 cam

*****Possible future mods*****
4th gen seats, fiberglass spoiler, rear disc, 3.42, torsen(posi), Edlebrock Performer TBI intake, headers, y-pipe and cat, afpr

1985 IROC-Z, TPI Auto
-Accel Super Coil
engine and tranny overhauls coming this summer


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