car doesnt want to pull past 3 grand or higher rpms,starts loadin up if i try to get on it ,at idle sometimes it surges doesnt idle steady but as soon as i pull one of the injectors it idles smooth no codes pop up and fuel pressure looks good new coolant temp,o2, this one has me stumped.

 

Check ALL injectors with a multimeter.

They should read ~16ohms if I remember, but basically find the odd man out and replace it (if you have a spare) or just relace them.

OT: 91 GTA sounds sweet! pics?

 

when there all plugged in it stumbles a little when i disconect any of the injectors it smoothes out figured disconecting one gives it a lean so it causes the computer to richin it up funny with one of them disconected it runs the smoothest idles fine with any of the injectors disconected

 

Like I said, check them all with a multimeter, see if one is bad.

If they all check out fine you might very well have another issue.

 

working on it for a friend he took it to a shop the just ripped him a new 1 left it worst then what it went in its 91 black gta 5.7

 

I've heard of quite a few shops that will do that to a perfectly good car.

Did it go in the shop for the same problem you're mentioning?

 

no lol it actually went in for somthing else well the idling problem and not passing smog but it pulled nice all through the rpm range motor runs strong but when it went to the shop now it dont respond and it runs like crap after 3 grand so bad u have to take ure foot out the gas only runs fine at less then half throttle

 

I'd also have to say check all the basics, timing etc.

Hard to say without more info or actually seeing what it does...

 

a weak spark will cause you not to be able to rev over a certain rpm.

like when your running on just a battery you notice the car lights get dimmer, and it runs ****tier, and your revving gets worse n worse.

 

timing checked its at 10 tps voltage checked .60 or so new coolant temp sensor and o2 cats arent plugged up checked revs up fine in nuetral a lil stumble but pulls to 5 grand but under a load its not ive check the fuel pressure its 45 or so and i checked it under a load 2

 

check fuel injectors like they said then. if thats not it, sell the car.

 

im checking the injectors tommorow but cant sell it its not mine if not i whould just trying to help someone out but im pretty good with the tpi troubleshooting but this ones new to me has me stuck

 

have you tried smashing the tpi with a hammer?

 

sledgehammmer didnt work traviz maybe if i cross the positive and negative it might fry everything and work right

 

like said check the injectors they should be between 14-16ohms, also check maf sensor swap out yours thats what it more sounds like

 

its not maf.

 

no its speed density

 

Eric does it again

 

advice comin from someone that cant even get there own car to run halfway decent most people that have a clue anything 90 up is speed density it dont take a rocket scientist im not going to say any names

 

There's another sig quote for TraviZzzzZzZZzz

 

Done and set in stone.

(see sig)

 

lol oops didnt see it was a 91



in that case check the map sensor

 

nice try, its only listed in the title and a few posts.

how exactly do you check a map sensor buddy?

 

with a DVOM should be about 1v-1.5v at idle and 4.5v-5v at WOT. I don't think its the MAP.

 

heres a pic of the headache