Question about 1990 Buick Regal

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I have a 1990 buick Regal 3.1 that rotates but will not start I have replaced the fuel pump and filter now I have the proper fuel pressure and spark so I did a OBD1 test and came up with code 33 which is the MAP sensor will that keep it from starting?

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A bad MAP sensor will definately keep the car from running properly, some vehicles run really rough when it's bad and others won't even start.

Posted on Mar 28, 2011

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Hard Start When Cold 01 Bucik Regal


Did you check the fuel pump relay ?
You would need to use a fuel pressure gauge and check pressure before you crank the engine.
When you turn the key switch on, the pump relay is supposed to provide power for 3 seconds to boost fuel pressure.
If fuel pressure is ok, the coolant temp sensor could be telling the computer the engine is warmer than it really is.

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I have a 1990 Buick regal that does not turn over on first attempt and is sluggish to start.


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.

Sep 15, 2012 | 1990 Buick Regal

1 Answer

Turns over and won't start, replaced fuel filter and just turns over and almost fires


Almost fires? Do you mean it does fire some, that you know the plugs are getting spark? If so, then you probably need to have your fuel pressure tested to see if pump is working properly. Can you hear the pump buzz on briefly when you turn key to on? It should come on for a couple of seconds to pressurize the lines. If you don't hear it, then your pump may be bad, or something not turning pump on. Good luck.

Nov 09, 2011 | 1995 Buick Regal

1 Answer

Engine rotates but will not start


three things an engine needs, fuel, air, and spark. without any one of these it will rotate but not start. 1. Air - If filter is clogged it cannot get air, but it would have to be verry dirty for this to be the problem 2. Fuel - If no fuel check fuel filter, lines, sending unit 3. Spark - Check ignition, spark plugs, plug wires,
If it has no spark and this happened suddenly, as it was running, died or was shut off and now won't start it is also a very good probability that the timing belt broke.

Mar 23, 2011 | 1990 Buick Regal

1 Answer

I have a 1990 Buick Regal that stalls...


You might try a crank sensor, most of the time if you pull it out you may see a crack in it. It's between the top of the oil pan an the transmission, good luck.

Jun 20, 2010 | 1990 Buick Regal

1 Answer

Car starts but won't stay running it's a 99 buick Regal GS Supercharged


CHECK FUEL PRESSURE IT SHOULD BE 41 - 47 PSI. IF NOT REPLACE FUEL FILTER.IF NO CHANGE. REPLACE FUEL PUMP.IF FUEL PUMP IS GOOD.YOUR PROBLEM COULD BE A INTAKE LEAK OR SPARK IGNITION PROBLEMS.ALSO USE A SCANNER TO CHECK FOR FAULTY SENSORS OR THEFT DETERENT PROBLEMS.

Sep 18, 2009 | 1998 Buick Regal

1 Answer

98 Buick Regal -engine quits


ok its one of two things you need to check when it cuts off if you have spark or fuel if you lose fuel pressure replace pump it gets hot and makes noise like its running but its not pumping fuel and if you lose spark you need to replace ignition control module has a hair line crack in it and when gets hot the crack expands and loses contact and wala no spark

Aug 15, 2009 | 1998 Buick Regal

1 Answer

WILL NOT START. cRANKS, AND HAS SPARK. hAS NEW


replace the fuel filter.While doing so blow back the fuel lines to make sure you have no blockage.

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1 Answer

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most likelly it is your fuel pump is not puting godd fuel pressure
have the fuel pressure test and if it is low have the fuel pump and filter replaced

May 28, 2008 | 1990 Buick Regal

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