Question about 1989 Pontiac Firebird

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Correct oil pressure for 1989 trans am

What is the corect oil pressure for 5.7 pontiac

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Anything above 40lbs

Posted on Feb 01, 2009

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1989 trans am gta, 5.7 ltr tpi, replaced my battery with brand new gell cell, as soon as I connect positive cable ican hear fuel rails prime and continue, started car and after shutting off ignition


If the Oil Sending Unit becomes defective, it often keeps the fuel pump running even after the car's engine is shut off. Replacing the Oil Sending Unit should correct the problem. Believe it or not Pontiac uses the oil sending unit as a back up to power the fuel pump.

Nov 03, 2014 | Cars & Trucks

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Oil pressure gauge disconnected


1989 Pontiac Firebird 5.0L TBI OHV 8cyl

The Oil Pressure Switch is located:Under hood, center, rear engine area, driver side of distributor, mounted in block

Apr 03, 2013 | 1989 Pontiac Firebird

1 Answer

I have a 1993 Pontiac transport van and it will start up and run for 5 or 10 seconds and die


You may want to do a fuel pressure test to start. The pump could be defective. The fuel pressure should hold steadily and not decline with the pump off. If the fuel pressure falls, you either have a fuel leak, stuck injector, faulty fuel pressure regulator, or a bad fuel pump check valve. If the pressure holds at the correct spec, note the pressure as the engine runs and then dies. If the guage shows correct pressure, you can then move on ruling out the fuel system.

Apr 03, 2013 | 1993 Pontiac Trans Sport

2 Answers

I have a 89 pontiac firebird Trans Am "GTA" 5.7L tuned port injected. My engine gets hot somehow and my car has a quick start but lower power afterward. What could the problem be?


Fix the radiator cooling problems. You will damage the engine if you keep running the car in an overheated condition.

1. Replace the thermostat in the cooling system
2. Replace the water pump
3. Flush the cooling system thoroughly and re-fill with the correct coolant. Bleed any air out of the system otherwise you will have problems with air blockages and thus poor coolant flow.

You probably do not know how to do any of this so take it to a reputable workshop or cooling specialist to have it done.

Dec 25, 2012 | 1989 Pontiac Firebird

1 Answer

What's your problem?1989 trans am wont start


Have you checked for spark at any of the sparkplugs?

Feb 24, 2012 | 1989 Pontiac Firebird

1 Answer

Engine oil pressure light stays on


Could be the oil pressure sender unit failure or oil pump failure. Have it checked . If it is the oil pump you can severely damage the engine if you keep running the car.

Jan 24, 2011 | 1989 BMW 5 Series

1 Answer

I have a 1990 pontiac trans am gta, my fuel pump is working replaced fuel relay but fuel is not getting to the injectors, what can i do???


check fuel regulator. chek fuel pressure w/gauge see if have rite pressure if does put vacuum on regulatoer w/vacuum pump if pressure drops replace regulator

Oct 20, 2010 | 1989 Pontiac Firebird

1 Answer

No oil pressure at idle once motor warm


Re-new the engine oil and see if the problem persists.
Low oil pressure at idle is usually a sign of a worn motor - worn camshaft and crank bearings allowing excessive oil to pass.

Oct 09, 2009 | 1989 Pontiac Firebird

1 Answer

What is the correct oil pressure for a 1989 pontiac trans am with the 5.7


Generally, the pump should put out about 10psi for each 1,000 rpm that the engine will be run at. If the shift will be at 6,000 rpm, then the engine should have 60 psi when warm at 6,000 rpm

Feb 01, 2009 | 1989 Pontiac Firebird

1 Answer

Correct oil pressure for 1989 ponticac trans am


It should be 15psi at Idle, hope this helps

Feb 01, 2009 | 1989 Pontiac Firebird

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