305 tpi car won't rev, backfiring...

[quasar34]

well hes allready got 4 hours of labor in diagnosing the car before he found out it was the injector.. then add another 300 for the injectors plus the 8 hours for labor would be $1,300..i barely have the money to do the injectors myself but im gunna just tell him to pull the injector so i can drive it home (its like 4 blocks away from my house) and get my dad to help me put in the new injectors..


Batman: i switched out the TPS after i cleaned the throttle body with a brand new one, used a voltmeter to check it was set right, which it was and it continued doing the same thing..

anyone know if i need to take the fuel rail apart when i do this? only reason im asking is because arent there a bunch of o-rings i'd have to replace if i have to take it apart? i allready know im going to need new gaskets for the plenum

[maroman88]

mattttt ive done it like 30 times lol

[Zero4488]

Try the ECU, mine went bad in my 86 and cause a whole bunch a different problems with the car, but your FP is pretty low...I think mine was well into the 40 psi level....

[quasar34]

Zero4488: well the problem is one of the fuel injectors has a short..mechanic unplugged the injector and i drove it to my house..

so now i have a list of stuff im trying to order tonight:
BBK adjustable fpr
msd 8.5 mm super conductor wires
slp air foil
19 lb. injectors (ford racing or accell??)
complete tpi gasket set
o-rings for fuel rail

now i have a question as to what kinda injectors i go with..stock injectors are expensive, so thats out of the question.. i found a set of accell 19 lb. injectors for 269 and i found a set of ford racing 19 lb. injectors for 260.. i havent heard the greatest reviews on accell products so im thinkin i may go with the ford racing.. according to tpiparts.net theyre supposed to be reliable and not as prone to clogging. any opinions on them? from my understanding even though they are ford racing they dont need any mods whatsoever to fit, or do they?

[maroman88]

no mods, there all the same injector

[Batman]

Go with the Ford injectors.

[Zero4488]

well I'm going to give you the heads up, when I but the BBK FPR on my 86, it didn't fit, the adjustment screw was too long and hit the bottom of my plenum...just for a heads up...

[maroman88]

i have the BBK but i managed to get it to work fine, bumped up the pressure a few pounds

[Zero4488]

Idk...I tried changing the screw, and nothing got it to work, so I just put it back to stock....

[Predator86]

I didnt read through the entire thread so i dont know if this was mentioned but i'll say it anyway....check your distributor....I had an issue like that and it turned out to be the rotor...so check the cap and rotor if you didnt already

[conlinj]

My formula had bad injectors when I got it, causing the car to have a really bad idle. I picked up some used ford 19lb injectors (stock 5.0/4.6) for real cheap ($20) and they are good injectors. Buy yourself a gasket kit ($30-$40, comes with the injector orings) go slow and it's not a big deal you can get it done in a few hours just start early. It was my first time changing it and taking the whole tpi setup apart and I had them changed out pretty quick. You should be able to do the job for $50-$60 dollars.

-Jim

[Zero4488]

sorry to hi-jack, but what would make my FPR not fit right?

[quasar34]

ok so i ordered some stuff the other night from summit and tpiparts.net just waiting for it to come in the mail... i bought the ford racing 19lb injectors, injector o-ring set, tpi gasket set, fuel rail o-ring set, bbk adjustable fpr and msd 8.5mm super conductor wires.. total was 220 + 214 = $434.. probly gunna do a little bit of porting to the plenum also..

[conlinj]

Don't port the plenum on a 305 tpi car, it will just take away low end torque, I've made that mistake. Only thing would be to grind out the egr walls that block the throttle body ports.'

-Jim

[Batman]

I wouldn't touch the plenum on a TPI car.