1989 gmc 5.7 liter replaced engine with slightly used rebuilt engine from a junk yard .i used my distirbuter coil and carb .i'm getting spark and fuel cheched timing several times only back fires i tried starter fluid went to start it back fired but this time it blew the valvue covers out

Asked by GuruHWYR Apr 23, 2017 at 01:45 PM about the 1989 GMC Sierra 1500 C1500 Extended Cab LB

Question type: General

has this happened to anybody before what is wrong with this engine how do i
fix it.......

223,905

Rowefast answered 7 years ago

The timing or firing order has to be off. When putting in the distributor, did you bring #1 piston up on the compression stroke and to TDC?

1 people found this helpful.

Best Answer Mark helpful

Your Answer:

1989 gmc 5.7 liter replaced engine with slightly used rebuilt engine from a junk yard .i used my distirbuter coil and carb .i'm getting spark and fuel cheched timing several times only back fires i tried starter fluid went to start it back fired but this time it blew the valvue covers out 1 Answer

has this happened to anybody before what is wrong with this engine how do i fix it.......

1989 GMC Sierra 1500 C1500 Extended Cab LB

-

General
Hello, I have a 1993 GMC Sierra 1500 5.7 v8. only in cool to cold temps the eng. acts like it wants to choke out and die. 1 Answer

After it warms up it runs better but acts up at times. in the summer or temps 60 degrees or higher it runs great. I have changed the fuel filter, spark plugs, cap and rotor. any ideas why this only...

1993 GMC Sierra 1500 C1500 SLE Extended Cab SB

-

General
My 2015 GMC Sierra 1500 4x4 tried to start when I was not in it! 1 Answer

Truck is 22months old w/ 52000miles. I was not in the truck, Keys were in my pocket and ONSTAR app not activated. I got in and hit the brake pedal(nothing) put keys in ignition and it wouldn’t start...

2015 GMC Sierra 1500 SLE Double Cab 4WD

-

General
Ok I just bout a truck an 89 gmc Sierra and the guy didn't know what type of engine was in it all he could tell me was the fuel injected motor that was in it shot so he got it replaced and put a 350 edlebrook carborator. Ok we'll my actual question is how do I actually tell what kinda motor the guy had put in it 5 Answers

I really need to find this out

1989 GMC Sierra 1500 C1500 Extended Cab SB

-

General
1996 GMC Sierra club cab 4x4 just quit running when , I was driving it . Sounds rough when runs does not smoke. Was full of oil and transmition fluid, hard to tell where the sodd sound is coming from. Please help, do not have a lot of money! 1 Answer

1996 GMC 135,000 miles. Ran like a top 5.7 motor. truck just turned off while I was driving it. Odd sound can't tell where it coming from. Does not smoke, Does not seem like a rod gone out?

1996 GMC Sierra 1500 K1500 SLE 4WD Standard Cab SB

-

General

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.