I have a 1996 Buick Riviera Supercharged/3.8L V6. Engine hesitates around 1800 RPM’S & then accelerates fine. I have replaced the following: Fuel Pressure Regulator, air filter, air intake sensor, PCV valve, spark plugs and wires, MAP sensor, idle control sensor, Mass airflow sensor and the purge control valve. I have a Check engine light on with code PO102. The light goes off at times & it runs fine when the MIL light is off?
Ok, that seems like an awful lot of parts to throw at a car to try and fix one problem. The p0102 is for the Mass Airflow Sensor. When you replaced it, did you use a GM part, or did you get the part at an aftermarket parts store like AutoZone or Pep Boys?
First one was from a junk yard’original equipment.
Yeah, well that’s never a good way to go. You need to a good known new part from your local dealership and go from there. There are so many different issues that can occur with a bad MAF sensor. Aftermarket ones are junk, and I would be the piece you got from a junkyard was just as bad. Well, like I said…..get a brand new one from the dealer and I would bet your problem will be gone. Also, check the connector at the MAF sensor for any wiring issues such as a broken terminal, loose terminal tension, or a wire that partially broken.
2nd one – original AC Delco rebuilt w/warranty. I also checked the Gnd Circuit, Voltage circuit, Signal circuit along with the 3 wire connector and it checked out fine.
Put a new MAF sensor in and you’ll be fine.
Seems to have plenty of power, starts right up, leaks no fluid or burns any oil.
That really is of no concern, if you’re setting a P0102, you need to replace the sensor. Oil leaking or burning would have nothing to do with the check engine light and the code you have.
O.K. Will try that. Thanks.
1997 Buick Riviera
I have a 1997 Buick Riviera – Supercharged 3.8L v-6. Car jerks several times, runs O.K. for while, then will jerk several times again.
By jerking do you mean the engine is misfiring, or do you mean something like a transmission problem?
This is after it goes into overdrive, around 50-55 MPH
Then I would say you have an internal transmission issue. This will usually the require the transmission to be removed and inspected for the problem.
Shifts fine at low & top end & accelerates fine. Okay. There are no problems with driving the van once it gets started, its just getting it started. There’s plenty of gas in the tank and sometimes it starts okay. two mechanics have scanned the vehicle and don’t know what the problem is. Traction light goes on & off at times. Scanner calls out P1645 or TCC Enable Circuit. will it help to change the filter & auto fluid?
The TCC is inside the transmission and needs to be repaired. Changing the filter and fluid will not help your condition.
Thanks for for the information on the TCC. There’s no need to waste $$$$ then.
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9 Comments on "1996 Buick Riviera 3.8L Hesitation and Engine Light"
95 riviera with series 3 heads does not diagnose as MASS problems. please advise, the EC SYSTEM program logic when cylinders 1 and 4 have spark retardation. I believe it is the mass air sensor that is causing the misfiring? what do you think?
replaced series II with III block/heads. paripherals changed to II. MAF sensors not replaced, cylinders 1 and 4 barely firing on this 3.8 riviera. is it the mass air sensor or the fact that the head portals are bigger, causing 1 and 4 to retard the spark?
97 Buick Riviera SC…check engine light on…code says MAF low input…replaced MAF 3x’s…replaced the wires from MAF to computer….replaced and programmed new computer…still have the check engine light on and throwing the same code…any ideas? wont pass emissions
Replaced the throttle position sensor
1997 Buick Riviera rpm problems. Car stay crank for a few seconds.
Hi , and HELP WE HAVE A 98 BUICK RIVIERA AND MY HUSBAND WAS GOING TO PUT THE WATER PUMP BUT MY HUSBAND SAYS THE CAR IS SHOT IS HER RIGHT
I don’t know. What kind of shape is your Buick in? Did it overheat? Does the engine knock?
I HAVE A 1996 Buick RIVIERA v6 3.8L (Supercharged). It is blowing the Mass Airflow Sensor upon start-up. Car will not start.
A bad MAF sensor should not cause the car to not start. It might make it harder to start, or run rough with a check engine light though. But if you are sure the sensor keeps blowing, then follow the wires all the way back to the ECM. A shorted wire is the only thing that can do that, but it would be very odd.