Question about 1990 Buick Riviera

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How to run check engine scan on 1990 buick riviera use a jumper if so where what are the codes

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The fuel pump on my 1990 buick riviera has been replaced and in purrs like a kitten when standing still but shuts off when put in gear where is the relay switch

Posted on Jun 07, 2013

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Get back to you.

Posted on Sep 06, 2010

  • Jonah Oneal Sep 06, 2010

    THE RIVIERA YOU USE CLIMATE CONTROL PANEL TO GET THE TROUBLE CODES.TO GET STARTED YOU TURN IGNITION ON WITH VECHICLE OFF / PRESS OFF AND TEMP BUTTONS / UNTIL ALL SEGMENTS AND BULBS OF THE IPC ARE LIT,SYSTEM HAS ENTER THE SELF DIAGNOSTIC MODE / RELEASE OFF AND TEMP BUTTON / ILLUMINATING THE SEGMENTS OF THE IPC, DIC, AND ECCP ENSURES ALL DISPLAY SEGMENTS ARE WORKING PROPERLY.IF ALL SEGMENTS ILLUMINATE PROCEED TO DISPLAYING TROUBLE CODES.TROUBLE CODES WILL APPEAR AS EO23 THAT THE ECM CODES YOU WILL SEE CODES B119 - THATS THE BODY CONTROL MODULE TROUBLE CODES. WRITE ALL CODES DOWN YOU WILL NEED A TROUBLE CODE BOOK TO LOOK UP TROUBLE CODES.YOU CAN BUY ECM CODE BOOK AT AUTO ZONE OR ADVANCE AUTO. NOW TO EXIT FROM THE ECCP OR ELECTRONIC CLIMATE CONTROL PANEL PRESS BI - LEVEL BUTTON OR TURN OFF IGNITION SWITCH OFF.TO ERASE TROUBLE CODES YOU WILL SEE CLEAR CODES ON THE SEASON ODOMETER PRESS FAN BUTTON ON THE ECCP CONTROL PANEL IT WILL ERASE CODES.THE OFF BUTTON ON ECCP CONTROL PANEL WHEN YOUR TROUBLE CODES DISPLAYS PRESS THE OFF BUTTON TO RETURN TO NEXT SELECTION IN THE PREVIOUS TEST.IF YOU WANT TO EXIT THE TROUBLE CODES PRESS BI LEVEL OR TURN OFF IGNITION SWITCH THAT WILL GET YOU OUT.

  • tendr247
    tendr247 Nov 01, 2012

    I did that and got a dealership code which auto zone didn't know what it meant.I still need to know what 6420c (i think the c means current) but i need help with knowing what the number means.

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1 Answer

1990 buick riviera cranks but wont start


Check your fuel pressure; if it is within specs, have a muffler shop test your back-pressure from your catalytic converter. There are other things that can cause strange problems like this but it is a process of elimination.

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It should take care of itself if the engine is running - can you tell if the electric pump in the engine compartment is running ?

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1995 Buick Riviera Retrieving Engine Codes


make sure the tool is working and that evry things connected with a power source-----codes will only give a general direction to the problem------a scan that runs a data stream is what pros use in a shop

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2 Answers

Cause of rough idle/1990 buick riviera/3.8 l


I agree with the possible bad fuel theory. You would need to figure out if the miss is a fuel problem or ignition problem to proceed.
I would pull the plugs and look at them, also check for vac leaks.
Is the check engine light on when the engine is running ? If so check for trouble codes.

Jul 26, 2012 | 1990 Buick Riviera

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We have a 95 buick riviera with the supercharge 3800 v6 engine. It overheated, usually runs at 200 degrees and blew the oil dipstick up and oil splattered on the engine. Oil level is ok and oil...


The overheating might be caused by a thermostat stuck closed, have it replaced. That should fix the overheating, as for the hesitating, run a scan on the ECM module to make sure you dont have any codes, clear if any and fix anything that might've gotten damaged from the overheating.

Aug 23, 2011 | 1995 Buick Riviera

2 Answers

My 1990 riviera will run great, as you are going down the road it will shut off,but crank right backup. whats wrong?


Check the ECM part number. If it is a 1228253 that is your problem. get a 16198264 the other number does just what your car is doing. I worked at a Buick dealer and know about the problematic 1228253 ecm.

Apr 26, 2011 | 1990 Buick Riviera

1 Answer

It runs great at time then it runs very bad email me at kizz00@yahoo.com it is a 92 buick riviera


replace your fuel filter and have the fuel pressure regulator checked for proper psi to the injectors.

Oct 19, 2010 | 1990 Buick Riviera

1 Answer

What does code 26 mean?


Did you try going to Advance Auto or a similar business to check the code for that. Sometimes they can get you in the ballpark or check error codes online.

Jun 07, 2010 | 1990 Buick Riviera

1 Answer

1990 riviera oil pressure guage goes nuts when accelerating. can just a sensor be replaced?


Could be. Check the wiring at the oil pressure sending unit. If the wiring is good, replace the sensor. It is located Under hood, passenger side, rear engine area, above oil filter, mounted on lower timing cover. Curtorsey: Auto Zone.

Sep 07, 2009 | 1990 Buick Riviera

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