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1990 Buick Lesabre "coughing"
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Tridox76
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Jul 8, 2016, 11:35 AM
Post #1 of 10
(2022 views)
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1990 Buick Lesabre "coughing"
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So I have a 1990 Buick Lesabre with 298,000 miles on the car with 180,000 ish on the engine and tranny. I've had this issue for awhile now, but on occasion as I drive down the road my car will jerk and have a coughing fit. Kinda like I just started running over a bunch of pot holes all at once. Sometimes it happens, sometimes it doesn't. The fuel pump and filter were replaced 7,000 miles ago, I replaced spark plugs (but not wires) two weeks ago, and I checked the coil by attaching a spark plug to the wire and grounding it out and each coil pack sparked just fine.
I have no idea what it is. It only happens every once in awhile, and I don't want to take it to a mechanic and pay $75 for them to say nothing happened. I mean I drive a car the same age as me with 300,000 miles on it. Money bags I am not :) any help?
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Hammer Time
Ultimate Carjunky
/ Moderator
Jul 8, 2016, 11:41 AM
Post #2 of 10
(2020 views)
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Re: 1990 Buick Lesabre "coughing"
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It does no good at all to test the coil for spark when the problem isn't present at that moment.
I would replace the wires. They deteriorate fast than the plugs in these cars.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tridox76
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Jul 8, 2016, 11:45 AM
Post #3 of 10
(2016 views)
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Re: 1990 Buick Lesabre "coughing"
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Is it possible to test the wires with a multimeter before replacing them? If so how would I do it?
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Hammer Time
Ultimate Carjunky
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Jul 8, 2016, 11:47 AM
Post #4 of 10
(2014 views)
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Re: 1990 Buick Lesabre "coughing"
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Not really, just replace the wires.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
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Jul 8, 2016, 12:41 PM
Post #5 of 10
(2006 views)
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Re: 1990 Buick Lesabre "coughing"
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Gotta agree totally on that. The wires take a lot of abuse just doing the plugs without some real fancy boot pullers so if older at all might still test ok but just too inaccurate IMO.
I/we hear you about costs and money - try skipping something that causes you an accident and see what costly is. You've got plenty of time and miles to spend a few bucks to check the whole thing out for what else is lurking and is it worth it much more at all,
T
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Tridox76
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Jul 8, 2016, 1:07 PM
Post #6 of 10
(2000 views)
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Re: 1990 Buick Lesabre "coughing"
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So I'll pick up some wires today and replace those. Is there anything else it could be? If that doesn't fix it what else might be going on?
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Hammer Time
Ultimate Carjunky
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Jul 8, 2016, 1:16 PM
Post #7 of 10
(1997 views)
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Re: 1990 Buick Lesabre "coughing"
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We don't answer "What if's". We believe the wires are the major issue so resolve that before looking for anything else.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
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Jul 8, 2016, 1:31 PM
Post #8 of 10
(1992 views)
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Re: 1990 Buick Lesabre "coughing"
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Sport - reading both you threads - Said I (we) understand money issues. IDK the price but wires are a weak link for the symptoms.
Think of high voltage wiring items like even a garden hose under very high water pressure. Drive over them, kink them a few times you've really rolled the dice on causing a leak. The sprinkler at the end is your spark plug and wont put out water if it's easier to leak out before it gets there - follow me?
This car owes you nothing but also know when to quit as well,
T
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Tridox76
User
Jul 8, 2016, 2:26 PM
Post #9 of 10
(1985 views)
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Re: 1990 Buick Lesabre "coughing"
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Thanks Tom, that's helpful. I'll replace those wires and see if it fixes the problem, I really hope it does.
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Tom Greenleaf
Ultimate Carjunky
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Jul 8, 2016, 2:46 PM
Post #10 of 10
(1980 views)
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Re: 1990 Buick Lesabre "coughing"
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Treat even the new ones carefully. They are not friendly to being yanked on, bent, rubbing even pulling boots back on new ones be careful. Feel them click at each end and route them where they belong out of harm's way.
OK - while beating on it you could OHM test them and show correct but still leak out unseen and cause misfire. So could a lot of things they are just higher on the list,
T
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