1990 K1500 truck - won't accelerate well, has steady knock
10-08-2005, 03:57 PM
#1
Staging Lane
Thread Starter
Join Date: Feb 2005
Location: Hilliard, OH
Posts: 70
Likes: 0
Received 0 Likes
on
0 Posts
1990 K1500 truck - won't accelerate well, has steady knock My uncle has a 1990 K1500 4x4 w/ 4.3
I has close to 300k on it. Starts fine, runs at idle but as you accelerate or put a load on it(especially up hill or getting on the gas...merging on the highway etc.) there is a steady knock.......it won't accelerate....gets up to speed but takes a long time.
Would this be timing or knock sensor? Truck vibrates a bit at idle....leads me to believe timing is off a bit. Timing chain has not been replaced.
Any ideas?
Thank you.
I has close to 300k on it. Starts fine, runs at idle but as you accelerate or put a load on it(especially up hill or getting on the gas...merging on the highway etc.) there is a steady knock.......it won't accelerate....gets up to speed but takes a long time.
Would this be timing or knock sensor? Truck vibrates a bit at idle....leads me to believe timing is off a bit. Timing chain has not been replaced.
Any ideas?
Thank you.
10-08-2005, 10:32 PM
#2
12 Second Club
iTrader: (9)
Join Date: Jan 2002
Location: Morrisdale,PA=home & Asheville,NC=work
Posts: 742
Likes: 0
Received 0 Likes
on
0 Posts
I had a "95" K1500 that had the same issue,found it to be the vacuum advance in the distributer was rusted and wouldnt allow the advance to work..
