Buick Lesabre engine misfiring when hot

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tins41
Posts: 1
Joined: Thu Jan 17, 2013 2:51 am

Buick Lesabre engine misfiring when hot

Unread post by tins41 » Thu Jan 17, 2013 2:53 am

when my 1989 buick lesabre gets warmed up it starts to miss really bad what cud be my problem?

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ProTech
Posts: 651
Joined: Wed Oct 17, 2012 10:08 am

Re: engine misfiring

Unread post by ProTech » Thu Jan 17, 2013 8:57 pm

Usually a faulty ignition component is to blame when the problem only acts up after the vehicle is warmed up. It could be a bad spark plug, or ignition wire, or coil, or module. Possibly even a bad fuel injector, as the resistance in them changes as temperature rises.

Your best bet would be to get the car scanned and see if any codes are stored in the computer and go from there. Otherwise, you'll have to get the car hot, and when it's acting up you'll have to figure out which cylinders are misfiring and then start checking components related to those specific cylinders.
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fasteddie
Posts: 2
Joined: Tue Aug 13, 2013 11:23 am

1999 buick lesabre wont start

Unread post by fasteddie » Tue Aug 13, 2013 11:28 am

1999 buick le sabre how do you know if you have a bad cam sensor or crank sensor, car wont start.

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carriedi
Posts: 2353
Joined: Wed Apr 10, 2013 12:42 pm
Location: Oregon

Re: 1999 buick lesabre wont start

Unread post by carriedi » Tue Aug 13, 2013 10:04 pm

you would have to see if you have spark and injector pulse. Without a lab scope or scanner the way you can tell if you have a cam and crank signal is to check to see if you have spark to the spark plugs or the injector pulse to the fuel injector.
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