Question about 1984 Buick Regal

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1984 buick regal w/3.8 liter non turbo cranks but doesnt start

I had done some recent work on the car first it was a coolant leak, then while i was fixing that i noticed a fuel leak around the front of the carburetor where the fuel filter threads into it. so i put in a new fuel filter and threaded it back into the carburetor and replaced a section of the fuel line that goes into the fuel filter because it was tweaked. then after that the car started idle rough but eventually evened out so i took it for a test drive, and on my way back the check engine light went on then off and i never seen it again but since i disconnected the battery on this buick being its an OBD 1 it reset the codes so now i cant figure out why it wont start. I replaced the coil and the map sensor because they were no good.

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  • Buick Master
  • 10,397 Answers

Check the coil packs for voltage , the cam position sensor and the throttle position sensor. Put a code reader on it and crank it so any new codes will come up.

Posted on Mar 30, 2017

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 148 Answers

SOURCE: engine stalls

your on the right route but also check egr valve

Posted on Jul 07, 2008

  • 321 Answers

SOURCE: buick lesabre nightmare

Need to get a scan tool and look at the data stream while it is running for alot more info.Also any trouble codes.Sounds like initially,the engine isn't getting any fuel.I would have a pressure gauge connected to the fuel rail on the engine,so i could monitor the fuel pressure while all this is going on.Items to look at on the data stream would be timing,what timing is the PCM commanding for the engine.Also,have you checked for continuos power feed to the coils during this no start condition,and fire at the plugs while cranking.You could possibly still have spark,but maybe it is extremely weak?I have seen bad ignition switches cause weird problems before too.Many things power up through the ignition switch,just a thought.Have also seen bad PCM's cause strange problems..38 volts is a little on the low side for GM.Usually see those at,at least .50 and up,and rise steadily while pressing the throttle,up to just under 5.0 volts.Potentiometer with 5 volt supply.Vacuum leak can be checked with engine running at a steady idle speed,spray brake cleaner all around the intake manifold and listen for engine speed change.

Posted on Jul 31, 2008

  • 321 Answers

SOURCE: buick lesabre nightmare 2

  • The PCM doesn't even see the O2 sensor until engine temp has reached operating temp,the vehicle goes from open loop when cold,to closed loop when warm,where the PCM uses the O2 sensor to measure the rich/lean of the exhaust content,and from that,adjust fuel richness to achieve 14.7 to 1 air/fuel ratio.So when cold,the O2 sensor is out of the picture anyways.When unplugging sensors,it can be deceitful.The PCM has a program whereas,if a critical sensor (such as the mass air flow) is somehow damaged and out of the picture,the PCM will substitue a generic value that will allow the engine to stay running.So,by unplugging the MAF,it did try to run on it's own better than plugged in,there's the problem area.The vehicle is running better with the MAF unplugged,because the MAF is likely bad,and the PCM is substituting it's generic value when it IS unplugged.Something to recheckThe PROM update is a newer program for the PCM,and likely won't fix it unless the PCM is bad.I would try a good used PCM as a last or later resort,because i have seen my fair share of defective PCM's too.I have taken some PCM's apart,and found capacitors that had gone bad and leaked all over the circuit board,mostly Honda and Mitsubishi and Chrysler though.Good luck,keep me posted.

Posted on Aug 01, 2008

  • 255 Answers

SOURCE: buick lesabre no start

Hi you have replaced allmost everything ,(try fuel pump relay)

Posted on Aug 18, 2008

fastboyz
  • 674 Answers

SOURCE: rough idle

fuel filters rarley cause idle problems. i would look at the egr valve or possible vaccume leaks.

Posted on Aug 24, 2008

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1 Answer

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.

Apr 03, 2013 | 2001 Buick Regal

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What is the firing order on a 99 buick regal 3.8 vin code k naturally aspirated motor


For 1999 Buick Regal 3.8 liter V-6 VIN "K" check this diagram...

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Hope this helps (remembe to rate and comment this answer).

Aug 23, 2011 | 1999 Buick Regal

1 Answer

I have a water/antifreeze leak below the thermostat of 1996 buick regal 3.8L and can't see what is leaking or why?


its sounds like a intake manifold gasket...these cars are know for this an they leak coolant at the corners of the gasket around the thermostat or it is a front engine cover leaking...u need to have a coolant pressure test done on this to make sure since these repairs can be expensive

Jul 14, 2011 | 1996 Buick Regal Olympic Gold

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Had radiator flushed and coolant added 4 months ago. yesterday coolant needed light flashed on and then it went off. reservoir was empty. added water to reservoir, cranked the car and let it run 5 mins....


You probably have a slight leak from the coolant filler cap and you have lost coolant by evaporation over the four months. Check the seal on the cap and replace it or the cap.

Mar 13, 2011 | 2000 Buick Regal

1 Answer

1984 buick regal 3.8 v6 engine won't start cranks but wont start


mcdevito75 here, under the distributor cap is a white retangle shaped ignition module it has a plug of about 4--6 wires to it that could be bad, no way to test and just the part cost $20-- $35.00 and you msay need a metric nut driver set to change it. Have your local shop do the job. If you belong to a mpotor club AAA towing may be free.

Jun 17, 2010 | 1984 Buick Regal

1 Answer

Buick Regal problem-help!!!!!!!!


Have you done the basic maintenance. Spark plugs, oil change, ect.? As for the fans, if you have a/c one of them should only come on when your a/c is on. The other is regulated by a relay so when your car reaches a certain temp it kicks on.

Jun 02, 2009 | 1991 Buick Regal

1 Answer

My friend has a 1984 Buick Regal, 6 cycl. 3.8 Liter with a prob..


the starter is failing and needs to be replaced... next time it just clicks..... hit the starter with a hammer..... it should start and that will confirm that is the issue.

Robert

Please take a moment to rate this solution .. thanks

May 23, 2009 | 1984 Buick Regal

1 Answer

1996 buick regal knocking noise


The intake may be leaking coolant into the crankcase. This can cause the lifter to bleed down also.

Apr 05, 2009 | 1998 Buick Regal

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