’93 945T with 250K miles.

I’m having what seems to be an ignition problem.

Here’s the background: The car died one day while my wife was driving it. I diagnosed it as a faulty in-tank fuel pump. While the in-tank pump had indeed failed, that wasn’t the problem – it turned out to be that the timing belt had broken. The head gasket had been weeping for several years, so I figured I may as well do it all in one shot. However, the car sat for about a month before I finally dove into it.

So I replaced the head gasket, water pump, timing belt, tensioner, and front seals. Also discovered a rust pin-hole leak in the main fuel pump, so I replaced that and the fuel filter. (plus new cap, rotor, plug wires and plugs)

I got everything buttoned up, and the car started fine.

My wife drove it for a few days, and it seemed to be ok. Then it stalled a few times on her, and finally quit altogether.

The car started and idled fine when I began working on it. The tach jumped around when I was cranking it to start, but once it started, the tach was stable. After a few minutes, the engine just stalled and wouldn’t re-start. I noticed the coil was hissing (!). I figured maybe it’s shorted out, and was experiencing some thermal expansion(?). I replaced the coil and the power stage/amplifier. The engine started again. I took it for a spin. Ran and pulled great right up to redline. Went about a half mile, stopped at a light, then accelerated hard again, and it began missing. When it misses the tach jumps wildly, and the fuel injection relay in the dash cycles on and off rapidly.

The fuel pump cycles on when the key is turned to the #2 position. The RPM sensor was replaced several years ago.

Any thoughts? (Thanks in advance)
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Jeff Pierce (Post back with your results... it's what makes this forum work.)