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1990 Chevrolet S10 Blazer Questions

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The car is shaking and stauling. The spark plugs were replaced I believe it may be a distributor that needs to be replaced back wondering if you can time the engine on a Chevy S 10 blazer Tahoe 1990. It’s running to rich. It’s misfiring and sputtering.
I have a 89 s10 chevy blazer 4x4 not 90 for some reason it didn't have a option for that year but anyways the dashboard is electronic and completely blacked out i have no idea what the problem could be. The break light is on at all times and only started when the rest of the dash blacked out. Pulled out the dash and the mother board and replaced a few 25 cent parts check engine light pops on every once in a while bit other than that i have no idea what else to do any advice would ve greatly appreciated.
We put a new timing chains check the fuel took the distributor to the spark still won't start
It seemed that it had a short,then stoped working .checked wiper fuse.started about two months ago,they would work,then they wouldnt,I could move the wiper arms and they would start working.
It seemed that it had a short,then stoped working .checked wiper fuse
What kind of oil should I use to change the transfer case fluid
Sometimes it'll stall without putting it in drive. I can pull each plug wire off one at a time and it stalls,which makes me think each plug is firing. I recently replaced the coil. I cleaned the portal for the IAC and even replace the IAC. No change. This is a 4.3 V6 engine.
Sometimes it'll stall without putting it in drive. I can pull each plug wire off one at a time and it stalls,which makes me think each plug is firing. I recently replaced the coil. I cleaned the portal for the IAC and even replace the IAC. No change. This is a 4.3 V6 engine.
fuel comes on changed fuel filter put on new coil does not appear to have spark or fuel.
Gas is good and clean and the two injectors work and fuel comes out when tring to start. All fuses good. It was running fine, parked it and tried to start it two days later. Would not start. I used started fluid, no change. No popping, no backfiring, does not try to hit on any cylinders when cranking.
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