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Re: 1991 buick lesabre tune up [imidazol97]
Written by: vance728 on Jan 19, 2008 7:29:02 PM
thanks a lot for your time and help.
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Re: 1991 buick lesabre tune up [imidazol97]
Written by: imidazol97 on Jan 19, 2008 7:16:05 PM
A note about oil light. Could be sender. Could be worn oil pump and that may have lowered pressure and worn bearings. and someone noted in another discussion " These engines were notorious for their weakened oil pressure relief valves. If you have been using conventional oils and not changed oil at proper intervals, you probably have gunked up the seals inside the relief valve or in the oil pressure sensor. ... Read More
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Re: 1991 buick lesabre tune up [vance728]
Written by: imidazol97 on Jan 19, 2008 6:56:31 PM
If the plug wires are still Packard which is original Gm wires, it's past due. If they're a different brand I'd go by how old they look. I'd put in a bottle of Chevron Techron fuel system cleaner (available at Walmart, Meijer, Pepboys, Advance auto, compare prices). Put it in when tank is low and then add 10 gallons or 20 gallons. Drive and see if it makes a difference. I ... Read More
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1991 buick lesabre tune up
Written by: vance728 on Jan 19, 2008 6:43:39 PM
what do i need to do to get optimum gas mileage on this car. i put new plugs in and it gave me a couple more mpgs.. what else do i need to do. i was posting this question while editing my reply to imidazol and he answered my question before i finished editing it which was great. he's fast. by the way thanks imidazol
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Re: 1991 buick lesabre [vance728]
Written by: imidazol97 on Jan 19, 2008 6:24:50 PM
At 79000 and regular service I'd want to find out what it was. The sensor for oil pressure could be bad. The oil changes he did might have been 7500 miles instead of 3500. The knock could be something other than lower engine problems. Could be a crankshaft balancer. Is it erratic or constant with ignition firing? If you know which dealer did the service, I'd go back and ask them ... Read More
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Re: 1991 buick lesabre [imidazol97]
Written by: vance728 on Jan 19, 2008 6:15:46 PM
it has 79000 miles and the older gentleman said he serviced it regularly at the dealership. do you know anything about a product called no knock or something like that. if you do will it harm the engine. also everybody is saying they are getting 25-30 mpg. on ther'e 91 buick just like mine 3.8 i put spark plugs in it. what can i do to tune it up to get ... Read More
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Re: 1991 buick lesabre [vance728]
Written by: imidazol97 on Jan 19, 2008 4:19:38 PM
If the oil hasn't been changed for a while, check to see if it seems diluted (thin) and smells of gasoline. I'd change the oil and put in 20-50 IF you're not in a cold, cold climate. I'm assuming you're using 10-30 now. You don't tell how many miles and what kind of maintenance like regular oil changes at 3000-4500 miles it's had. I'm assuming it's wear on bearings especially if ... Read More
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1991 buick lesabre
Written by: vance728 on Jan 19, 2008 3:41:34 PM
my 1991 buick lesabre has a knock i only hear while idling or at slow speeds 10-15 mph. the oil light also blinks on and off at times. could this be oil pump? or could it be major(bearings)?
