Hi guys, I'll try and keep this brief.
So I'm having problems with my 1991 ST185 Alltrac again (Gen 2 3SGT). Before I stored the car for the brutal Canada winter last year, it was having some issues. I would drive the car on an expressway for a bit, after which the throttle response would die, the AFM would not read anything, and the only solution to keep the car from stalling out would be to keep it limping between 2nd and 3rd gear and pray I could get it to go. AFM would read extremely pig rich (<9) under boost (max 14psi). After I got to my destination, the car became a crank no start.
Over the winter, I replaced the fuel pressure regulator, as I was 90% certain that it was causing low fuel pressure. Afterwards, car started up no problem at all, and I drove if fine for a few weeks up until recently. Fast forwards to yesterday, after coming back from a drive out of town, it did the exact same thing as I described before.
I know there is a really nasty exhaust leak between the turbo and the manifold. I already have a metal gasket on order from PrimeMR2, just waiting for it to arrive so I can replace it, along with a new aluminum radiator at the same time. However, I don't *think* that should be related, should it? Maybe it is affecting the O2 sensor readings and tripping out the ECU into not sending fuel/spark. Or the heat from the exhaust leak is making something else (ignition component?) act up. At this point, I'm pretty sure the issue is ignition related, but I'm gonna check for ECU codes and continue to test stuff today/tomorrow. In the meantime, would you guys have any ideas as to what it might be based on these symptoms?
So I'm having problems with my 1991 ST185 Alltrac again (Gen 2 3SGT). Before I stored the car for the brutal Canada winter last year, it was having some issues. I would drive the car on an expressway for a bit, after which the throttle response would die, the AFM would not read anything, and the only solution to keep the car from stalling out would be to keep it limping between 2nd and 3rd gear and pray I could get it to go. AFM would read extremely pig rich (<9) under boost (max 14psi). After I got to my destination, the car became a crank no start.
Over the winter, I replaced the fuel pressure regulator, as I was 90% certain that it was causing low fuel pressure. Afterwards, car started up no problem at all, and I drove if fine for a few weeks up until recently. Fast forwards to yesterday, after coming back from a drive out of town, it did the exact same thing as I described before.
I know there is a really nasty exhaust leak between the turbo and the manifold. I already have a metal gasket on order from PrimeMR2, just waiting for it to arrive so I can replace it, along with a new aluminum radiator at the same time. However, I don't *think* that should be related, should it? Maybe it is affecting the O2 sensor readings and tripping out the ECU into not sending fuel/spark. Or the heat from the exhaust leak is making something else (ignition component?) act up. At this point, I'm pretty sure the issue is ignition related, but I'm gonna check for ECU codes and continue to test stuff today/tomorrow. In the meantime, would you guys have any ideas as to what it might be based on these symptoms?