1992,buick lesabre spudders and misses when accelerating
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1992,buick lesabre spudders and misses when accelerating
Hey guys just picked up a 92 lesabre for a work car and when driving after a few minutes it spudders and falls on its face and backfires. Any advice is appreciated. I replaced the fuel filter. Thanks
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From: Worcester, Ma.
Does it idle ok?
Common fault is carbonning at coil terminals....pull wire at each coil terminal to check for black carbonning.....if there clean with sandcloth, and replace wires.....
Check secondary ignition with a spark tester at the end of each ignition wire......
Check plugs for wear/fouling....
May just need a COMPLETE tuneup, plugs, wires, pcv, and air filter...
Common fault is carbonning at coil terminals....pull wire at each coil terminal to check for black carbonning.....if there clean with sandcloth, and replace wires.....
Check secondary ignition with a spark tester at the end of each ignition wire......
Check plugs for wear/fouling....
May just need a COMPLETE tuneup, plugs, wires, pcv, and air filter...
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Posts like a V-Tak
Joined: Nov 2017
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Check the ignition coils for rust and for a no spark concern.The way to do this is while the car is running take a long pair of pliers with insulated (rubber or whatever) grips and pull the coil wires off one at a time. If one of them is not firing move that coil to another location and see if the no fire moves or stays on the same cylinder.
If it moves replace them coil.
If it stays the same replace the ignition module.
If there is rust on the coil replace the coil.
If you are firing on all coils and there is no rust. You may just have a faulty wire or plug. I would just go ahead and tune the vehicle.
Coil - http://amzn.to/2iwapUc
Ignition module - http://amzn.to/2ixao2s
If it moves replace them coil.
If it stays the same replace the ignition module.
If there is rust on the coil replace the coil.
If you are firing on all coils and there is no rust. You may just have a faulty wire or plug. I would just go ahead and tune the vehicle.
Coil - http://amzn.to/2iwapUc
Ignition module - http://amzn.to/2ixao2s
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Posts like a Supercharger
Joined: Jul 2015
Posts: 160
Likes: 21
From: Chico, California (USA)
Check the ignition coils for rust and for a no spark concern.The way to do this is while the car is running take a long pair of pliers with insulated (rubber or whatever) grips and pull the coil wires off one at a time. If one of them is not firing move that coil to another location and see if the no fire moves or stays on the same cylinder.
If it moves replace them coil.
If it stays the same replace the ignition module.
If there is rust on the coil replace the coil.
If you are firing on all coils and there is no rust. You may just have a faulty wire or plug. I would just go ahead and tune the vehicle.
Coil - http://amzn.to/2iwapUc
Ignition module - http://amzn.to/2ixao2s
If it moves replace them coil.
If it stays the same replace the ignition module.
If there is rust on the coil replace the coil.
If you are firing on all coils and there is no rust. You may just have a faulty wire or plug. I would just go ahead and tune the vehicle.
Coil - http://amzn.to/2iwapUc
Ignition module - http://amzn.to/2ixao2s
Wondering if the egr valve is not closing once warmed up. Could be a bad shaft inside the egr valve.......come across this prob every now-and-then at work.
The ignition coils there'* three of them.....correct? Are they supposed to have thermal conductor paste beneath them?
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True Car Nut
Joined: Feb 2015
Posts: 6,809
Likes: 1,006
From: Earth
Agree with the others that spark is a possibility.
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