My oldsmobile 1996 88, gets off every once a while when driving; specially at slow speed or stop.. Crankshaft position , camshaft , MAP, MAF, IAC and Throttle sensors are already replaced... check engine light is now off but the car continues stalling at slow speed or stop.. wire set also is new and coils set...
Re: Need help... Im at the point to fire my car..!!
Sounds like the solenoid that locks up the torque converter. This is a mechanical device that locks up the torque converter at around 31 MPH. Pull the shifter into a lower gear (normal drive rather than overdrive) while you re driving about 33 mph. You will feel the car **** a little as it drops the lock up soleniod pin out. Shift it back and forth between overdrive and drive at this speed...33 mph or so.... as long as you can feel this happening a few times. I'd say to do it 10 - 30 times. This will not hurt anything but if it is mechanically sticking, it might help to solve the problem
There are a few other things I might suggest but this will first be a good test. If you drive the car in second gear (much slower to not over rev the engine), it should not ever stall because the torque converter should not lock up anyway.
This problem will not set an OBDII code or turn the check engine light on at all. This will make your car stall when comming to a stop or turning a corner. The car will quickly restart. This can be a very intermitent problem.
Re: Need help... Im at the point to fire my car..!!
This is just a possible solution to you all follow the airtube from your air filter box and remove the aluminum block that is on the intake the air tube connects to this block, once its out of the way look inside the intake to see if antifreeze is present if so you need to replace the plastic intake, due to poor construction it is common for them to crack and leak water in to the combustion chambers eventually cause your car to stop running and it will not crank, because the cylinders are full of water,
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May have head gasket leak. If so will be loosing water, possibly quite slowly. At highway speeds cylinder pressure is higher and so gasket leak more likely. Means gasket damage or loose cylinder head. Can be checked by mechanic. (pressure test and cylinder head bolt tension test) Less likely alternatives, the spark timing is too advanced or the fuel too poor.
It could be a vaccuum line leak. Depending on the make model of car there could be a bunch. Not to fear though there is a sure fire way of finding it (the leak). Grab a can of starting fluid if no SF then carb cleaner or maybe wd40. have someone keep the car runningas low of rpm as possible once the rpms are stable at one speed start spraying little bursts of the starting fluid. If it is avaccuum leak the vehicle will increase in rpms. However look for a crack in the intake manifold loose carb or injector tree.
if your car has a coil pack it could have a hair line crack and would need to be replaced this would cause the car to stop running once it get hot because when it overheats the coil pace quites allowing your spark pluges to fire which causes the car to stop running
The problem sounds like the solenoid that locks up the torque converter. This will not set a code or turn on the check engine light. The car will restart each time after it stalls. This will happen when you are comming to a stop or turning a corner. At times, you can start the car in neutral but when you put it in drive or reverse, it will again stall.
This can also happen after you have driven the car and parked it. When you restart the car, it may stall when you try to drive it because the solenoid is still locked from when you pulled into the parking spot.
Try to free it up by driving the car about 32 mph in drive (drive with the square around the D) where the overdrive and lock up torque converter will work. At 32 - 34 mph, pull the shifter down to the next Drive (D without the box around it) and you should feel the bump of the torque converter unlocking. Then put it back into the upper drive location and you will feel it lock up agian. Repeat this about 20 times and see if this does not help. These can start becomming mechanically "Sticky" and cycling them 10 - 30 times can help.
There is also a 6 wire connector on the forward (front of the car) side of the transmission. This connector might be dirty. Clean it with electrical contact cleaner (spray type) and reconnect it to the transmission. This connector is probably not the problem but worth lookign at anyway.
There is also a small port in the valve body of the transmission that if plugged, it can cause this problem. I feel it is most likely a "Sticky" soleniod that locks up the torque converter and makes the car stall just like comming to a stop in a standard transmission car without pushing in the clutch.
it can be couple of thing Try a fuel injector cleaner or new fuel injectors.it can be vacuum leak. Engines need a vacuum
to run especially at idle which is when your car dies. It could be a stuck
EGR. If the check engine light comes on it will store a code so take it to a
shop and pay them to read the codes. This may give you a starting point.