i have a 94 z28 with a single turbo it runs fine if u drive normal but if u try to get into it its seems like it just flat lines around 4000 rpm it still revs but no power its boosting fine u can feel it wanting to go but it just wont and i can not fined out y so if u can give me some tips it would help a lot thx

 

check your fuel pressure under load. Do a data log.

 

Hello, give us more info on your car.

 

it a 94 z28 lt4 hot cam 81mm single trubo 7psi everything els is preddy much stock

 

what should it be under load 43.5 or more??

 

yea 43 is about what I have been told.

 

ok cool i was thinking the cat could have taken a **** cuz its kinda stugish all around to what do u thing about that

 

How about a little history?

Did you just do all this to the car and have not gotten it running right yet or is this a car that has been up and running some time and this is a sudden problem?

 

yeah if a cat is clogged or melting you'll have no top end and low end will be affected. run it at night and look at the cat to see if it's glowing. why do you have a cat on a turbo car anyways?!

i see you're in peoria, where abouts?

 

yes it has ran good for a while now and this just started happing i got the car stock with 97xxx miles and now has a 100500 miles on it and its bin runing like this for about a week now the opti is new i was kinda thinking it could be blowing spark out or the cat is taken a **** but im not shur the car has 43lbs of fuel pressure at idle so i think thats good i really dnt know what els it could be

 

what size injectors do you have? 255 pump? who tuned it?

 

im on lakepleasnt pkw and deervally were r u and the cat came on the car i made my own sts kit like u did and didnt feel like cuting it out so i just left it

 

i know a couple f-body guys that live a mile from you lol i'm way out in gilbert like an hr drive.

once it gets dark out let it run, drive it around, get it hot some how and check the cat. does the turbo seem to take longer to spool now?

 

ya it takes a long time to spool now

 

most likely the cat's partially clogged/melted

 

ok ima go cut that think off and weld in some tube

 

Damn you welders, makin me jealous. I need to work with my welder so I can fab up my front mount.