My engine stalls out while driving?

I'm not familiar with your car brand or model but I see you've been waiting a long time for a reply. What you described was very common on Chrysler products in the late '80s and early '90s. It was caused by a failed MAP sensor. Chrysler is the only manufacturer I'm aware of that has never needed a mass air flow sensor. On their engines, the MAP sensor had the biggest say in how much fuel was commanded to enter the engine. When it had just started to fail but wasn't bad enough to set a diagnostic fault code, the clue was the engine would stay running as long as the accelerator pedal was moving. The engine would stall as soon as the accelerator was held steady. Normally the throttle position sensor has very little say in fuel metering calculations, but in this case it became more important to the computer.

On your car, also look at that mass air flow sensor. It's in the fresh air tube between the air filter and the throttle body. There can't be any leaks or loose clamps on that hose. All air going into the engine has to go through that sensor to be measured so the right amount of fuel will be calculated.

Hello. Thanks for the donation. Much appreciated

You will need to have the car plugged into a diagnostic computer to retrieve any engine and transmission fault codes stored on the cars computer. Repost with full fault codes for more assistance and repair information. The fault codes will guide us to where the fault actually lies !

Hi there,

The base idle may need re setting or you could have a faulty idle control motor, have the mechanic who did the head work check this out.

Mark (mhpautos)

What dose it do with the idle control motor unplugged, have you run a scan, this could be a faulty term sensor or idle control motor.

Mark (mhpautos)

Hi there,

These engines have problems with crank shaft position sensors, get a scan done to test for any set fault code, also check that the harness connector plug for the fuel pump is in good condition I have come across faulty plugs that have caused problems.

Mark (mhpautos)

It mat be a fuel pump failing or the DFI module under the coil, a mechanic will have to test these, but unfortunately they will have to be tested when the car has stopped, if it is running you will not get any indication that something is faulty.

If it is only stalling on the gas side of things you will have to get the gas system serviced, probably a problem with the converter, check to see if it is starting to freeze up when it stalls, if so check to a coolant loss as well.

You will have to get the ignition system fault tested if the problem is consistent with both fuel's the issue will be in the ignition electrics, you may have to do a continuity test of of all ignition wiring back to the ECU.