Question about 1991 Buick Park Avenue

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1991 buick park ave. missing at highway speed, tach revs up to 3000 rpm instead of usual 2200 sometimes dies at take off and then runs like normal for a while

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It seems that correct amount of fuel is not being supplied to the engine. Most probably the fuel nozzles have accumulated some dirt. Try spraying some carb cleaner into the air intake assembly when the engine is idling. This ought to mix with the air-fuel mixture being injected into the cylinders and if the nozzles are narrowed, should clean them up.

Posted on Nov 11, 2010

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Posted on Jan 02, 2017

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Ok. ive posted about my 93 buick park ave dieing when i stop . i was told brake booster which made sence but didnt work.now what uggg!. someone told me harmonic balancer. thoughts?


If that happens after you drove at speeds over 60km/h, there is a good chance that the lock up torque converter of your transmission does not disengage; to test that, drive the car at normal highway speed for a little while and put the gear selector in NEUTRAL before you stop. If the engine keeps on running, there's your problem

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Tach runs too high


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I have a 2006 chrysler pacifica. The engine light is on. It has gone off after i have put in super high test gas. Gas mileage is poor. When I try to rev it up in park it won't go over about 3000rpm. ...


My thoughts on your problem. First when you rev it up in park it shouldn't go over 3000 rpm the computer wont let it. Did you have the check engine light read to see what the code is? when you say the gas mileage is poor are you comparing it to what it once was? As far as the miss goes is it a constant miss or a random miss? if you could answer these questions I should be able to help you further

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Jul 11, 2010 | 1991 Buick Park Avenue

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Hi. I have an '82 F-150 with a 351 c.i. engine, the extended cab version with the full-length bed, 4WD, with only 20,000 miles on it. When I'm driving about 70 mph, the tachometer reads 3000 rpm, which...


Hi

It does look like you have a 3 speed C6, if the PRND21 description is correct. If you do have overdrive, the "D" will be printed in a white oval.

Sounds like it is OK. My Mustang has a 351C with a C6 trans, and 3000 rpm is about right at 70mph.

The defining factor on the rpm will be the Differential gears, which in a truck, might very well be taller gears instead of highway gears, as the taller gears provide more power output at the axles than the highway gears do.

Example:
if you had 3.0 to 1 gears (Highway), that means that the driveshaft will turn 3 times for every complete revolution of the rear wheels(Axle)

If you had 4.0 to 1 gears, then the driveshaft would turn 4 times for every revolution if the axle. Lots of torque for pulling stumps, but on the highway. the engine will have to turn more rpm's to maintain 70 mph vs a 3 to 1.

with the 3 to 1, you will turn less rpm's on the highway, but will have less available low speed power (Torque) at the wheels.

Sounds like the truck is doing fine.

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1 Answer

Tach. drop's to zero while driving 70 ?


I have had the almost same problem twice. A 'thump', like the engine missed a fire and tach drops. Seems OK after restart. Electrical? Timing chain slip?
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1991 Saturn SL SOHC has two strange conditions that I can't figure out. First, the car seems to have a slight but constant acceleration at any speed under 30mph, and second, when you put the car into...


the idle air control valve can cause the symptoms your describing and it may not set a trouble code have it replaced and see if that repairs your issue

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Try changing the map sensor it controls idle and it could affect your car like that...........

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