Question about 1983 Chevrolet K1500

1 Answer

90 cc chinise quad engine wont crank manualy or

69 chev 1/2 ton 307 engine backfires often & very loud has vacuum advance






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  • Chevrolet Master
  • 426 Answers

What carb you got on it

Posted on Sep 07, 2009

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'68 Plymouth 318 4 brl carb is popping and backfiring. What could be the problem?


Cranking at a slower speed is often a sign of being out of time. That might explain the popping and backfiring, too. You need to use a timing light. Make sure it is set to specs. If it is set at the correct time, and the advance is working (you can check that also with the timing light), and the problem still exists, then I would recommend doing a compression test of the cylinders, to spot any problem with the engine's mechanical condition.

When you put new points on, did you also use a new condenser? You certainly should. And since the points burnt out, how about the spark plugs, do they need changing as well? Part of a tune-up is to make sure the gap on the spark plugs is correct.

If you are inclined to work on your car, buy a vacuum gauge for just a few dollars. These are real handy for the older cars. Here is a link on how useful it can be:
hmm, little difficulty...go to secondchancegarage.com , look at their menu and choose "How to Use and Interpret a Vacuum Gauge". A neat little tutorial on what you can see from a vacuum reading.

Nov 16, 2016 | Plymouth Cars & Trucks

2 Answers

What year is this engine? and ci


From this chart - I think you may be misreading the number - 3970010 is possibly the actual number: Which makes the engine pretty old 68-72 350 V8 - 4 bolt main. I included past this number so that you can see that the number you posted doesn't actually exist. And thus my conclusion that the 9 is most likely a 0. Hope this helps. 3970010 350 69 Corvette late 69,4 bolt main 3970010 302 69 Camaro Z/28,Late 69, 4 bolt main 3970010 350 69-79 Truck 2&4 bolt main 3970010 350 69-79 Pass,Chevelle,Camaro,Nova,MonteCarlo 2&4 bolt main 3970010 350 70 Corvette 300,350,370 HP 4 bolt main 3970010 350 71 Corvette 270,330 HP 4 bolt main 3970010 350 72 Corvette 200,255 HP 4 bolt main 3970014 350 69-77 Pass,Chevelle,Camaro, Nova,MonteCarlo 2 or 4 bolt main 3970014 350 69-79 Truck 2 or 4 bolt main 3970014 350 72 Corvette late &undefined;72,200 HP,255HP 4 bolt main 3970020 307 68-73 Pass,Chevelle,Camro, Nova 3970020 307 69-73 Truck 3970024 307 69-73 Pass,Chevelle,Camro, Nova,Truck 3992386 327 68-69 Pass,Chevelle,Camro, Nova,Truck Large Jounal

Oct 13, 2014 | Cars & Trucks

1 Answer

Cranks backfires


That could be a timing issues when it back fires
Why ,no idea,not a question you can guess at as we do here
Could also be a vacuum leak & lean fuel mix
When you say cranks the motor turns over nothing else
Cranking has nothing to do with the motor starting or running
You have a no start & back fire as I gather

Jul 26, 2013 | GMC Sonoma Cars & Trucks

1 Answer

1976 VW 2000cc bus, fuel injected, automatic single loud backfire, then dead! Pulling out of a parking lot at around 25 mph, I had a single very loud backfire, then the engine died. The motor will crank /...


I'd check the compression now, before getting involved with anything else. And double check the timing because that would explain a backfire and failure to start.

May 01, 2017 | Volkswagen Cars & Trucks

1 Answer

Need free wiring diagram for 69'gmc truck, 3/4 ton, with a 307 engine.Keep popping fuses, and I lose my dash, tail, and brake lights, dont know why.


Check Autozone.com They have some schematics. I check there before I buy mine at alldata. I don't have yours or I would give it to you.

Aug 04, 2011 | GMC C2500 Cars & Trucks

1 Answer

I hav an 88 chev half ton with a 350 turns over an its gettn gas to the throttel body but wont run


no spark, spark advance's are not connected or bad timeing is my guess. take a plug wire off put a spare spark plug in it ground it to the engine an turn the truck over, should have a blue snapping spark (may need a second person to help). the spark advances are located on the back of the throttle body looks like 2 vacume hoses check to see if those are connected, if theres no spark check the ignition coil

Feb 09, 2011 | 1988 Chevrolet K1500

1 Answer

I have a 1997 gmc 4x4 1/2 ton with a 5.7 vortech no spark


Have you checked the fuses? I think there are 2 ECM fuses if either one blows there will be no spark.

Dec 08, 2009 | 1997 Chevrolet K1500

1 Answer

1993 chev lumina euro 3.1 "t"


recheck valve adjustment and timing as well as vacuum leaks

Aug 06, 2008 | 1996 Chevrolet Lumina Mini

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