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1992 Buick regal running with miss

I have a 1992 Buick regal that has been running with miss, changed spark plugs, wires, coil pack and ignition module. Does not stall and starts with no problem. Have checked and noticed that spark is weak on 1,3,and 5 cylinders. Miss gets worst as engine warms up to operating temp. Also replaced fuel pump & filter and fuel pressure was checked and was ok. The car has 150,000 plus miles is reliable vehicle other than this problem. Any help will be greatly appreciated.

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  • Cars & Trucks Master
  • 5,494 Answers

I would do a compression test to see if all cylinders are good, and no internal mechanical damage has occurred.
If compression is good, check for possible intake manifold leak that especially affects the right bank- the bank with 1, 3, and 5 cylinders.
No way I can think of that spark would be different on the right bank, so it could be wrong air/fuel mixture for that side, or possible loss of compression that is causing the misfires.

Posted on Jun 08, 2017

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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txkjun
  • 409 Answers

SOURCE: Honda Misses.

Pin point the dead hole and check that injector.

Posted on Dec 24, 2008

  • 188 Answers

SOURCE: Check engine light comes on and goes off

Try putting somw SEAFOAM into your tank. It either your O2-sensor, or EGR-valve. Alot of the time, SEAFOAM will clean these sensor up????

Posted on Feb 07, 2009

  • 1 Answer

SOURCE: 1992 Chevy G20 Van Dies

I had the same problem after it sitting over the winter. I changed the fuel filter and added water remover to my gas and let it sit over night for the water remover to work and the next day it ran fine.

Posted on Jul 13, 2009

ecsracing33
  • 7 Answers

SOURCE: 99 buick regal won't start

Hello, the Regal seems to have that problem. Insert your key in the ignition and turn it but do not turn the car on, make sure you here the fuel pump kick in, then at the end of you r fuel rail there should be a cap, remove it, use a very thin screw driver and push that part in, Be careful it's going to squirt gas, that's a good sign. If it does not, check your fuel filter. And last, if nothing above described works first check your negative wire on your fuel pump, second your injectors, they might be clogged.
Best of luck, God Bless.

Willie
ECSracing Team

Posted on Aug 14, 2009

dttech
  • 4803 Answers

SOURCE: I have a 93 mercury topaz 4cyl 2.3L that stalls

It sounds to me like you replaced everything but the most likely cause of a stall while driving...The crank sensor.

Posted on Oct 11, 2009

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