powers84

iTrader: (4)

my car goings perfect except it has no power any more well then i guess it doesnt run perfct then but i dont know whats doing this . so when i take off from a start it has no torque at all some times i can stomp on it and it wont move but as soon as it starts moving it feels storng again. i thought it wasnt getting enough fuel but now i dont think that is it because when it starts going it doesnt heicup or anything

give me your opinons please.

i just got heads and new valetrain, underdrive pulleys, msd plug wires 1.6 RR, and some more stuff i havent put on yet i just dont want to put it on and be disappointed

infinitebird

iTrader: (11)

If it is just a steady power loss and there is no misfire then I would suspect it is fuel related. Get a gauge and verify your fuel pressure as a first step.

ws6chicken

+1 and ensure spark plug gap is correct

lt1mc

iTrader: (1)

change your fuel filter if you havent already

powers84

iTrader: (4)

i put it on a scan tool from gm and the fuel pressure is good the injectors are good. i just put new fuel pump and filter in it and i thought mybe it was the plugs so i put ngk's in it. nothing help thanks for the input any other ideas.

list of stuff i have done, new map and maf sensor, fuel filter, k&n cai, air foil, plugs,

i have a aero fuel pressure reg. i havent put in yet mybe ill try to put that in.

ThoR294

iTrader: (6)

aftermarket MAF?

also is your timing correct?

Formula350

iTrader: (3)

Mis-adjusted rockers would be my guess.

ZONES89RS

iTrader: (25)

Wow, a 90 third gen with a 305 would kill you right now, that sucks man, good luck with getting her right.

infinitebird

iTrader: (11)

Were you getting any knock retard on the scan?

MUSTANGBRKR02

iTrader: (91)

The car is a dog off the line it feels as if there is no breathing in the motor. It runs fine around town and no misfire. It is bone stock manifolds cats and all. He has LT's and heads and a cam for it but we would like to fix the low power problem before trying to add performance parts to it.

when we ran it last best time was a 16.0 @94 or so MPH with a blazing 3.0 60'

Dragframe

iTrader: (14)

well car runs good then because that is enough trap for at least a mid 14\

something funny is wrong..

MUSTANGBRKR02

iTrader: (91)

yes up top it pulls but lacks alot of low end power

LT1Formula007

iTrader: (66)

Just a tip....check to see if the cat is clogged b/c I had an issue kinda like yours with my old camaro. It was slow off the line but at higher rpm it would start to pull....turned out to be a clogged cat didn't figure it out till it would die when I gave it gas off idle. Just an idea, never hurts to try it ya know. Cars can be very tricky at times. Also timing could be off as well (maybe a streched chain or opti out of adjustment) Good Luck

3pnt4maro

iTrader: (2)

yeah i vote a breathing problem like a cat as well

MUSTANGBRKR02

iTrader: (91)

yeah i think we may try to put the headers on and see were it goes.

LT1Formula007

iTrader: (66)

Hope you get it straightened out soon, I'd hate to have alot of goodies sitten around and can't even put them on a car b/c it's not running up to par. Just seems pointless till you get it straightened out huh! Good Luck and keep us posted.

sdm1234

iTrader: (8)

check your new MAP and MAF. Something could be faulty and throwing an incorrect load rating to the ECU, resulting in an incorrect A/F calculation to give it more power under a heavy load. then, once you get going, the proper ratio is restored, equaling in high trap speeds.

since you just replaced heads/valetrain, it would be a bad/burnt valve. but check for maybe a bad piston ring, resulting in low compression. from the initial launch, the car is under significantly more stress than when it gets going up top. therefore, the lack of power due to the low compression would be more noticeable at low speeds.

good luck with the problem, and check back and let us know how everything turns out!

MUSTANGBRKR02

iTrader: (91)

we will try changing them with ones off of my LT1 thanks^^^^^^^^^^^

ThoR294

iTrader: (6)

the MAP will not do anything, the MAP on the 94+ LT1s were just there for diag purposes. The MAF will **** it up bad. If it has top end power, then I would not think it would be a cat clogged. if the cat was clogged. it prolly could not go over ~40mph

LT1MAN

iTrader: (6)

when my cat went, it had loss of power everywhere and was spitting white splinters out the tailpipes. is there any evidence at the end of the tailpipes? white stuff, chunks or anything??