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1990 BUICK REGAL WONT START NOW
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DHL 1973
Novice
Nov 18, 2009, 9:10 PM
Post #1 of 13
(4969 views)
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1990 BUICK REGAL WONT START NOW
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HAVE A 1990 BUICK REAGEL WITH A 3.1 V6 HAVE A DRIVABILTY PROBLEM THAT LED TO THIS TAKE OFF FROM STOP AND WOULD REACH 35 MPH AND LOOSE ALL HORSEPOWER AND STALL THEN START BACK UP GOT IT BACK TO MY GARAGE AND NOW IT WON'T START HAVE FUEL PRESSURE SPARK AND INJECTOR PULSE NEED HELP ALSO DID REPLACE FUEL PUMP AND FILTER AND STRAINER IN MAY PUT 6,000 MILES ON IT AND IT RAN FINE UNTILL TODAY PLEASE HELP ME
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Hammer Time
Ultimate Carjunky
/ Moderator
Nov 19, 2009, 3:38 AM
Post #2 of 13
(4963 views)
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Re: 1990 BUICK REGAL WONT START NOW
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You might want to check again on the injector pulse and fuel pressure to make sure it's where it should be. If you really have all that working properly, then you only have compression left which would mean it jumped timing which not all that common.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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DHL 1973
Novice
Nov 19, 2009, 12:58 PM
Post #3 of 13
(4957 views)
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Re: 1990 BUICK REGAL WONT START NOW
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HAVE INJECTOR PULSEAND SPARK WHEN IT RUNS AND YOU DRIVE DOWN THE ROAD YOU CAN ONLY GET UP TO 35 BEFORE IT BOGS DOWN BUT YOU COULD GRADULY SPEED UP TO SPEED BUT WHEN YOU SHUT IT OFF IT WONT RESTART UNTILL IT COOLS OFF FOR ABOUT 1 HR PLEASE HELP ME
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Hammer Time
Ultimate Carjunky
/ Moderator
Nov 19, 2009, 1:03 PM
Post #4 of 13
(4951 views)
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Re: 1990 BUICK REGAL WONT START NOW
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It doesn't matter if it passes those tests while it's driving down the road. It needs to be tested during the period that it won't start, especially the fuel pressure.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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DHL 1973
Novice
Nov 21, 2009, 8:43 AM
Post #5 of 13
(4942 views)
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Re: 1990 BUICK REGAL WONT START NOW
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TESTED FURL PRESSURE HAD 55PSI AND WHEN IT COOLED FOR ABOUT 45 MINUTES IT STARTED AGAIN THIS CAR HAD NEW INJECTORS INSTALLED IN 2008 NEW FUELPUMP EARLY 2009 AND COMPLETE TUNE UP ALSO REPLACED CRAKED ING COIL PACK AND MOUDLE THIS PROBLEM JUST STARTED IN THE PASS WEEK PLEASE HELP
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Hammer Time
Ultimate Carjunky
/ Moderator
Nov 21, 2009, 9:44 AM
Post #6 of 13
(4937 views)
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Re: 1990 BUICK REGAL WONT START NOW
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OK then, back to basics as we should have done in the first place.
All "crank, no start" conditions are approached in the same way. Every engine requires certain functions to be able to run. Some of these functions rely on specific components to work and some components are part of more than one function so it is important to see the whole picture to be able to conclude anything about what may have failed. Also, these functions can ONLY be tested during the failure. Any other time and they will simply test good because the problem isn't present at the moment.
If you approach this in any other way, you are merely guessing and that only serves to replace unnecessary parts and wastes money.
Every engine requires spark, fuel and compression to run. That's what we have to look for.
These are the basics that need to be tested and will give us the info required to isolate a cause.
1) Test for spark at the plug end of the wire using a spark tester. If none found, check for power supply on the + terminal of the coil with the key on.
2) Test for injector pulse using a small bulb called a noid light. If none found, check for power supply at one side of the injecter with the key on.
3) Use a fuel pressure gauge to test for correct fuel pressure, also noticing if the pressure holds when key is shut off.
Once you have determined which of these functions has dropped out,
you will know which system is having the problem.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
(This post was edited by Hammer Time on Nov 21, 2009, 9:45 AM)
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DHL 1973
Novice
Nov 22, 2009, 4:56 PM
Post #7 of 13
(4928 views)
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Re: 1990 BUICK REGAL WONT START NOW
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THIS IS AND INNTERMINTENT PROBLEM WITHC ONLY HAPPENS AFTER 20 MILES THEN WHEN CAR IS PARKED FOR ABOUT 20 MINUTES IT WILL RUN FINE UNTILL YOU GO ABOUT 20 MILES THEN IT ACTS UP AGAIN WE TWESTED IT WHEN IT HAPPEND HAD SPARK BUT NO INJECTOR PULSE BUT AFTER IT COOL OFF WE HAD EVERYTHING WHAT COULD IT BE THE ECM PLEASE HAMMER HELP
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Hammer Time
Ultimate Carjunky
/ Moderator
Nov 22, 2009, 8:06 PM
Post #8 of 13
(4925 views)
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Re: 1990 BUICK REGAL WONT START NOW
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OK, that does narrow some things down. What we still need to know is if when you lost injector pulse, was it the power feed you lost or the ground pulse. If it was the ground pulse, then yes it's starting to look like a bad ECM. That was pretty common back in those years.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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DHL 1973
Novice
Nov 25, 2009, 3:14 PM
Post #9 of 13
(4909 views)
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Re: 1990 BUICK REGAL WONT START NOW
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FOUND PROBLEM CRACKED INTAKE PLENUM BY MAP SENSOR REPLACED INTAKE PLENUM AND CAR RUNS FINE THANKS FOR YOUR HELP HAMMER HAVE A GOOD THANKGIVING
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Hammer Time
Ultimate Carjunky
/ Moderator
Nov 25, 2009, 3:22 PM
Post #10 of 13
(4906 views)
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Re: 1990 BUICK REGAL WONT START NOW
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Well, there certainly was no connection to losing injector pulse and an intake plenum so I guess that wasn't true, huh?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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DHL 1973
Novice
Nov 25, 2009, 3:37 PM
Post #11 of 13
(4899 views)
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Re: 1990 BUICK REGAL WONT START NOW
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I MENT THAT NICELY THANK YOU
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frank1234
New User
Jun 16, 2015, 4:02 PM
Post #12 of 13
(3125 views)
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Re: 1990 BUICK REGAL WONT START NOW
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car won't stay on after replacing battery
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Discretesignals
Ultimate Carjunky
/ Moderator
Jun 16, 2015, 6:19 PM
Post #13 of 13
(3122 views)
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Re: 1990 BUICK REGAL WONT START NOW
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Frank, you might want to start your own thread. Read the forum rules on how to create a thread. This one closed due to being solved....long ago.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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