car loses power at half throttle n past ive replaced.....
#1
car loses power at half throttle n past ive replaced.....
i have a 90 camaro rs 3.1 v6... ive replace fuel pump fuel filter and just changed the plugs and wires dizzy and rotor... the car gets a little better as the car warms up.. but it still loses power at half throttle and past.... when i floor it in N or P i hear some pops.. i need help!! bad...
PS just wondering could a bad fuse cause all of this?
PS just wondering could a bad fuse cause all of this?
#2
Re: car loses power at half throttle n past ive replaced.....
Get a fuel pressure test gauge, should be above 36psi (to 45psi at wot).
Check your ignition timing, make sure it advances when you rev it.
You might have as clogged cat, can you gut it in your area?
Check your ignition timing, make sure it advances when you rev it.
You might have as clogged cat, can you gut it in your area?
#3
Re: car loses power at half throttle n past ive replaced.....
and no i cant gut it we have emissions testing but with in the next few days im going to dissconect the cat to see if is that... i belive i have 2 years before i got to get it tested again
#6
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Car: 86' IROC-Z....and 5 other 3rdgens
Engine: 383 hsr
Transmission: built 700r4
Axle/Gears: stock 3.23, 10bolt
Re: car loses power at half throttle n past ive replaced.....
did this all start happening all of a sudden? or did u just buy the car and it had this problem? deffinatly sounds like timing, and esc modules and knock sensors are a prime suspect if this happened instantaniously. if it was a progression, then check out the timing chain. i know the correct amount of wear is suppose to be 40k miles. but no one hardly ever changes them that often
#7
Re: car loses power at half throttle n past ive replaced.....
did this all start happening all of a sudden? or did u just buy the car and it had this problem? deffinatly sounds like timing, and esc modules and knock sensors are a prime suspect if this happened instantaniously. if it was a progression, then check out the timing chain. i know the correct amount of wear is suppose to be 40k miles. but no one hardly ever changes them that often
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#8
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Car: 1992 Z28 , 2010 Cherokee
Engine: 305 TPI
Transmission: 700R4
Re: car loses power at half throttle n past ive replaced.....
This is definitly a timing issue . . . slap a timeing light on that ASAP
#9
Re: car loses power at half throttle n past ive replaced.....
alright how do i do that.. what do i do... and what is the light supposed to tell me.. and how do i adjust timing on these cars? i need more info then just tell me put a timing light on it lol
#10
Re: car loses power at half throttle n past ive replaced.....
A timing light has 3 connections, 1 to the postive battery connection, another to the negitive side, the 3rd hooks to the #1 spack plug wire (pass. side front wire).
Get the engine warm, then follow the the instructions on the emissions sticker, this will tell you the timing spec & a certain wire to unplug to put the ecm into timing mode. You point the timing light at the balancer behind the crank pulley, theres a scale on the engine w/ numbers on it, the balancer has a notch. When the engine is running the light will flash & show the timing marks & notch.
If its off you have to loosen the distributor hold down bolt (15mm) slightly, then rotate the dist. till the notch lines up w/ the number on the scale.
Reconnect the timing connector, point the light at the scale, rev the engine & the notch should move up & off the scale.
Do you have a repair manual? If not, get one.
Get the engine warm, then follow the the instructions on the emissions sticker, this will tell you the timing spec & a certain wire to unplug to put the ecm into timing mode. You point the timing light at the balancer behind the crank pulley, theres a scale on the engine w/ numbers on it, the balancer has a notch. When the engine is running the light will flash & show the timing marks & notch.
If its off you have to loosen the distributor hold down bolt (15mm) slightly, then rotate the dist. till the notch lines up w/ the number on the scale.
Reconnect the timing connector, point the light at the scale, rev the engine & the notch should move up & off the scale.
Do you have a repair manual? If not, get one.
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