89 300TE Sudden stalling repair

[turner]

I have an 89 300TE with a new used engine and 130K miles on it.

My Blower fan went out a few months ago so I did a blower and regulator replacement on it. After I finished I put the kids car seats back in and did a test drive thinking that this was a good idea as it had been sitting for 2 weeks. After the car warmed up it started idling like crap, as if it was misfiring. Even when you gave it gas it would bog down and then finally it would rev up again. Then in the driveway it stalled and wouldn't restart. So I had it towed to my mechanic, M&J's Foreign Auto in Rowley MA.

He diagnosed it as a cracked rotor and moisture problems. I picked it up and went on my way, only to find that as soon as it warmed up it stalled when I came to a stop.

I took it back and he replaced the fuel filter and checked the OVP and the fuel pump. I took it back and it did it agian. So I took it back to him again. This time he swapped out the idle air valve from a junker and told me to try it again.

I have been driving it for 2 weeks and it has consistently been dying, after the car warms up just over 80C, whenever I come to a stop or slow down under 10 MPH. It doesn't sputter it just dies, though I can catch it and put my other foot on the break and rev it up past 1000 rpm to keep it from stalling.

It happens at a gradual stop, not when turning or specifically on a hard stop. It restarts usually just fine right after. It can do it and then work fine right after at a stop, but it only happens when hot.

The other day when it was really hot 96F and had been sitting in a parking lot all day it really wanted to die the whole ride home.

I just dropped it back off today to see what else can be done.

I have seen this post SSS (Sudden Stalling) Factsheet

So anyone have more advice? Is there any way to diagnose this other than swapping out parts? This seems like it should be something stupidly simple but yet it makes the car unsafe to drive.

I have given all of these details in case anyone out there can point me in the right direction. Was it the blower replacement? Did I crack the wiring harness in front of the blower? Is there a way to electronically check the OVP that I should be asking for?

Any help is appreciated.

Thanks

John