Question about 1983 Buick Skylark

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Crank setup 1971 350v8 buick skylark

Spark plugs setup with the mark on the crank is wrong causing engine backfire and it wont start

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Do you mean firing order?if so and you have a buick engine it is
starting with the driver side cyl 1-3-5-7 the passenger side is 2-4-6-8.line up your crank shaft on the mark it has to be on compression stroke the wires go 1-8-4-3-6-5-7-2. let me know how you do .

Posted on Jan 09, 2009

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I have a 93 Buick Skylark GS 3300 Engine Series and my car is cranking but not firing. Diagnostic scan turned up a DTC42 code-spark timing error. The spark plugs are not firing. Replaced crankshaft sensor...


think a timing belt slippage or camshaft position sensor,
deffiantly something there to take a deeper look at.
double check the cams and their alighnment marks that they alighn with TDC if out of sync. nothing will fire right,the coil pack has no ides where anything is for some reason,good luck with this one,Gary

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1993 buick skylark wont start. its not getting spark. changed coil packs, still no fire. battery is fully charged, fuel pump comes on. why would stop it from turning over fully?


is the check engine light on?if you have no spark, start with the wires, and work your way back. you say that you replaced the coil packs..... it could be a crank position sensor. please get back to me if the check engine light is on. also, let me know what happened from the start. were you driving? has the car sat for a while?

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I have 1991 buick skylark, have no spark to plugs change crank sensor and module,,,,,,help still no start.


Do you have an anti-theft system on this car. That is about the only other thing I could think of besides bad relay or fuse. Since crank sensor and module are good.

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Had the head redone, new Carb fitted, new distributor cover and leads new spark plugs, crank timing set to mark (0)and cam timing (2e)set to mark on head. the engine swings, fires from the carb, spark on...


Sounds like you have your timing off. If it is backfiring, that means that 2 of your wires are crossed, causing the plugs to fire on the exhaust stroke versus the compression stroke. Recheck your timing.

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First thing is to check and see if it is getting spark to all the spark plugs. Let me know and we will go from there.

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1 Answer

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Does it crank and not start or not even crank. You could have a bad starter. I would test the battery first. When it won't start try to jump start it. If it jump starts it's probably the battery. If it won't jump start it's probably the starter.

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