My 1995 bonniville 3.8 supercharged has spark and gas and wont start

Chech the ignition timing is ok and is firing on the correct cylinder at the right time,

When it doesn't start check for fuel pressure, spark and injector pulse. If you got access to a scanner that could read live data check if you get an RPM reference. Check and report your findings.

I have a 1995 Jeep sport it crank but wont start I dont know what it could be

1.Jack up the vehicle
2.Place a rag under the supercharger bolt hold you will remove
3. Remove supercharger bolt, some oil may come out but not much.
4.**** out the old oil
5. Lower the car back down
6.Fill the supercharger oil
7.First time driving after change

HAVE THE SUPER CHARGE TUNE. GET NEW SPARK PLUG WIRE AND NEW SPARK PLUGS. MY BE YOU HAVE A GAS LEAK SOME WHERE THIS MY SOUND CRAZY MAYBE SOME ONE IS SEALING YOU GAS OR THE FLOAT IN YOUR GAS TANK IS STICKING.

Hello lysiphlebus2,

((My thoughts: cold START valve IAC at very bottom))

Plenty of places will do FREE diagnostic code reads.

I would rather suggest it be a muffler shop than
AUTOZONE... but either is better than guessing.

AUTOZONE will likely make you buy OXYGEN
sensors... (but that makes about as much sense as
buying a new THERMOMETER every-time you
have a FEVER.

What you are describing sounds (from an old
mechanic's perspective) like a collapsing
catalytic convertor or rotted muffler baffle
(a slightly better blockage will halt operation
completely)...

((again speculation... get your codes read))...

Do not buy OXYGEN SENSORS....

Know your prices before waltzing into any
exhaust shop.

AMAZON
1 24 of 108 results for Automotive 1995 riviera catalytic 1995 riviera...

rockauto
1995 BUICK RIVIERA 3 8L V6 Supercharged Catalytic Converter RockAuto

IAC (cold start valve)
1995 BUICK RIVIERA 3 8L V6 Supercharged Idle Air Control IAC Valve RockAuto

Hope this helps

Carnac the Magnificent

unplug the cam sensor behind the water pump pulley; see if it starts; if it does, shut off engine; replace both cam and crank sensors because crank sensors go out in these engines

i would ck timing & replace spark plugs any way,,still should ck fuel pressure,,at fuel rail,,,

I have a 1995 SSEI,it had the same problems.It was the ignition control module.It's located under your coil packs with a large wiring harness connected to it.

I don't think a 1995 3 series has a timing belt. 100% sure if its the inline 6 cylinder.bmw only used timing belts on two engines. (never replaced one) I would first start with a fuel pressure check to start your diagnosis. From there i'd check to see if you are getting spark and maybe even see if your plugs are fouled. If you have fuel pressure and spark, i'd suspect bad gas.(especially if the problem occured soon after filling up). It may be a good idea to do a compression check if you found no fault with the vehicle.