Okay guys I have been out for awhile and when I was racing before I ran a carb on my lt1 so I know very little about the EFI. Okay that said here's my promblem. Last week I bought a 95 trans am A4. The mods are 3:42 gears,air foil, edelbrock headers, no cats,edelbrock 3 inch exhuast, hypertech programmer, nitto drag radials., and aftermarket ram air. Okay here's the promblem driving around town this thing felt pretty good half throttle feels great so I was sure this thing was going to turn a descent time slip maybe somewhere in the 13.5 to 13.7 range. As I have buddies with stock lt1 and 2:73 that have turn 14.0 to 14.20 Well I took it fri night and she ran all of a 14.24 at 97mph. I know this thing is way off my friends said that after about 400 ft the nose on the car was dropping. So today I check the fuel pressure rhanking my pump might be bad but it shows 43 psi even under a load. I duct taped the guage to the window and drove down the road to make sure. Changed the fuel filter thanking that maybe I wasn't getting the volume I needed and it was stoped up but did not change a thing. I swear at 1/2 to 3/4 throttle this thing feels great and pulls straight throught the gears with no promblem but at full throttle it pulls through 1st gear and then kinda goes through the motions and at aroung 90 its like it hits a wall. So I think that I am running lean but dont know why? I even took the hypertech out at the track and it did pick up 1mph but no time. SO do you all think my injectors are bad? would a bad tps switch cause this? or is my computer screwed and pulling way to much timming out causing it to run bad? Any help would be great I want to get this thing running right before I start trying to make it any faster. thanks

 

Anyone???

 

does it feel like its missing? I had similar problems last year with one of my cars. it felt great on the street but on the strip it pulled a 15.6@87 but it was only fireing on 5 cylinders. I fixed that problem at the track that night and pulled a 13.7@100 I think it was.

 

NO it doesn't fill like its missing. starts right up idles at around 600 and drives real smooth but it just doesnt like wot ? I would bet that its running lean I just dont know why? Could my injectors be bad or dirty and still preform well at idle and 1/2 throttle but not be giving me enough fuel at wot.? Thanks for your help

 

Its very possible. they could be dirty. My car idled fine and drove fine at 1/2 - 3/4 throttle also. thats why i was asking.

 

was your injectors the problem that you was having?

 

mine was sparkplug wires on the plugs all the way. it did also help when i ran a lil race fuel in the car.