I also posted in the other forum to get more opinions.
1995 NAS D90
I cleaned the throttle body, replaced the stepper motor twice and plenum intake hose (from SafariHP) and it seemed to help somewhat but what I am going to describe still happens.
After starting the truck cold, it idles fine at around 1000 rpm. Under acceleration when pressing the gas, about 5% of the time, I hear a "backfire" type sound that seems to come from the area just in front of my feet along with a sensation of a little explosion just in front of the pedals. I don't lose power and continue to drive for a while. Then unexpectedly and without any indication of a rough idle (never early in the drive but may be about 30 minutes to an hour later), the engine dies, the oil light comes on and I can usually restart the truck with a simple turn of the key initially.
This seems to repeat at a quicker interval if I keep on driving and it becomes harder to restart the engine (seems to not want to turn over as easily). The temp gauge do not indicate an issue.
When this first occurred, the idle became unstable and I could sense the engine would die, but now with what I mentioned I have done, it goes from a smooth/normal idle to just die.
Does the backfire sound give a clue to what is happening?
1995 NAS D90
I cleaned the throttle body, replaced the stepper motor twice and plenum intake hose (from SafariHP) and it seemed to help somewhat but what I am going to describe still happens.
After starting the truck cold, it idles fine at around 1000 rpm. Under acceleration when pressing the gas, about 5% of the time, I hear a "backfire" type sound that seems to come from the area just in front of my feet along with a sensation of a little explosion just in front of the pedals. I don't lose power and continue to drive for a while. Then unexpectedly and without any indication of a rough idle (never early in the drive but may be about 30 minutes to an hour later), the engine dies, the oil light comes on and I can usually restart the truck with a simple turn of the key initially.
This seems to repeat at a quicker interval if I keep on driving and it becomes harder to restart the engine (seems to not want to turn over as easily). The temp gauge do not indicate an issue.
When this first occurred, the idle became unstable and I could sense the engine would die, but now with what I mentioned I have done, it goes from a smooth/normal idle to just die.
Does the backfire sound give a clue to what is happening?