Ok so ive posted a few times on here. Its a 1996 GT PI swapped. Motor has been in for almost a year. Around 4k-4500 RPM i get a miss. Plugs, wires, coil packs, fuel filter and didnt change my problem. Did a pressure test on the fuel pump and i was 10 Psi low so i swapped out the pump for a walbro 255. took it out for a ride and still doing it...not as bad but still there. So im thinking its an injector or regulator? I did find a loose connection on one injector and just ordered a new one and will put it on tomorrow. any input would be cool...if the loose connecton doesnt help i have a extra set of stock injectors that ill put in for now or im gonna go with a new regulator
fuel problems
- Thread starter 1Bad96
- Start date
What mods are done to the car besides the pi swap? I'm wondering why you're running that fuel pump.
If you had low fuel pressure to begin with, and you're still N/A, I would suspect you've got other issues which replacing the fuel pump to a higher output version just band-aided.
If you had low fuel pressure to begin with, and you're still N/A, I would suspect you've got other issues which replacing the fuel pump to a higher output version just band-aided.
PI motor with all bolt ons....im in the market for either a procharger or an S-trim after i get the bug out of my car and theres no point putting a stock pump back in it if im gonna be boosting it soon. And yes i know there are other issues....from the people i talked to they thought the low psi was the cause of the missing at high rpm.....the only other things i have in mind it to swap out injectors and regulator...ive been checkin for vacum leaks and havent came across anything so far
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