sometimes i dont have much power...
Thread Starter
Burning Brakes
Joined: Apr 2005
Posts: 1,110
Likes: 0
From: JUPITER FLORIDA
sometimes i dont have much power...
i have an 86 with a rebuilt engine, the engine is worked up pretty good. somtimes it feels like the car hauls ***, and then sometimes it seems like i have to put the petal to the metal and it goes nowhere( slowly climbs up the rpms). does anyone have any idea what this could be? i have a reburned chip, but it was not dyno tuned. all sensors are new.
my only ideas are,
old fuel pump ( what would it feel like if i wasnt getting enough gas?)
improperly burned chip
long tube hooker headers (postiion of where the 02 sensor is)
tps
Right now the engine has
edelbrock runners and base manifold
474. int/exh cam
vortec heads
long tube hooker headers
24 lb injectors
burned chip
any help would be greatly appreatiated!
my only ideas are,
old fuel pump ( what would it feel like if i wasnt getting enough gas?)
improperly burned chip
long tube hooker headers (postiion of where the 02 sensor is)
tps
Right now the engine has
edelbrock runners and base manifold
474. int/exh cam
vortec heads
long tube hooker headers
24 lb injectors
burned chip
any help would be greatly appreatiated!
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
gee... my first guess is temperature. If it's warm, or even HOT, the amount of O2 in the atmosphere is lower (density).
I would get it dyno tuned... just to be sure. That might find the problem.
If it was a slow pump, it would happen all the time, I would think.
My other guess is a questionable ECU... if you have access to a scan tool, I would use it. Monitor and record the engine data and see if there is any difference in data to performance.
You need some hard information to go on here.
I would get it dyno tuned... just to be sure. That might find the problem.
If it was a slow pump, it would happen all the time, I would think.
My other guess is a questionable ECU... if you have access to a scan tool, I would use it. Monitor and record the engine data and see if there is any difference in data to performance.
You need some hard information to go on here.
Team Owner
Joined: Sep 2001
Posts: 62,161
Likes: 1,733
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
I think you'll need to get it on a dyno and let us see the curve.
These symptoms are similar to a plugged main cat. You can check the TPS voltage and replace the fuel filter to eliminate those 2.
These symptoms are similar to a plugged main cat. You can check the TPS voltage and replace the fuel filter to eliminate those 2.
Thread Starter
Burning Brakes
Joined: Apr 2005
Posts: 1,110
Likes: 0
From: JUPITER FLORIDA
i have a new free flow cat and flowmaster mufflers and hooker headers l/t. the exhaust has a good grumble but its not that loud. i wonder if it is somthing with the knock sensor. somtime when i hit the gas the rpms will pause before continuing to rise. they stop at about 2500 rpm most of the time just for like 2-3 seconds and then continue to rise.
