20 Most Recent 1990 Buick Regal Questions & Answers

Is there a good vacuum supply to the MAP

1990 Buick Regal | Answered on May 31, 2018

The fuel pressure regulator on w bodies is right on the fuel rail. It looks like a top that kids play with sort of, there is a vacuum line that plugs into it, ironically this is how you test it, you simply unplug the rubber line that plugs into it and smell the end of that hose, if it smells like gasoline its bad, if gas drips out, its really bad. BTW this is usually the culprit when 3.1 act like what you described. Also if you have an oil leak on the end of the engine, drivers side, it is a pretty simple fix, the oil pump drive is where its leaking it is a simple o-ring, make sure to get a silicone one or you will probably be doing it again soon, NaPA has them on their help rack. Best of luck.

1990 Buick Regal | Answered on Dec 20, 2017

have mechanic run compression test. might need rings or valve job

1990 Buick Regal | Answered on Sep 27, 2017

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1990 Buick Regal | Answered on May 23, 2016

Unplug the fuse going to the fuel pump. If this stop the fuel pump from running. If it does, then go to the fuel pump relay after plugging the fuse back in and unplug it and see if the pump stops running. If it does the relay is stuck in close position and will need replaced. You can uplug the fuse and replug the fuse to the fuel pump until you get it solved. It usually is a yellow 25 amp fuse that is under the dash.

1990 Buick Regal | Answered on Jan 02, 2016

A lot of new parts! Have a compression test done to gauge the engine's internal condition, and go from there. If compression is good on all 6 cylinders, scan for trouble codes. The compression test may find your problem, something like an exhaust valve burned or not seating properly.

1990 Buick Regal | Answered on Feb 04, 2015

Broken speedo gear. Gonna have to pull the gauge cluster.

1990 Buick Regal | Answered on Sep 25, 2014

check fuel pressure,fuel relay.

1990 Buick Regal | Answered on Nov 15, 2013

what make and model and year

1990 Buick Regal | Answered on Dec 03, 2012

Electrical problem, more than likely. Battery not holding charge or alternator not charging battery.

1990 Buick Regal | Answered on Oct 25, 2012

locate and check the dimmer switch,if it is okay check the bulbs

1990 Buick Regal | Answered on Oct 12, 2012

Just to clarify, cranking is the same thing as turning over.
If it cranks but does not start, you need to check the fuel pressure with a gauge before and after you try to start it.
The pump relay allows the pump to run for 3 seconds before the engine cranks to boost pressure in the line. If the check valve in the pump is bad the pressure will drop off when the engine is not running.

1990 Buick Regal | Answered on Sep 16, 2012

The sensor is located at the bottom of the engine behind the harmonic balancer. To the right side of the motor. You have to remove the pulley to replace the sensor.

1990 Buick Regal | Answered on Jun 10, 2012

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