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On these cars, the crankshaft pulley outer section is bonded to a rubber ring inside. You will hear LOTS of funny noises when the car is running and the outer pulley is slipping on the inner section.
The timing marks must be properly aligned. It may have slipped a tooth, or two. The only way to tell is to remove the front upper cover, set the engine to crank TDC, firing position, and look at the upper timing belt gear. There is a small mark used for alignment. The lower covered driving sprocket can only be checked by removing the crank. pulley which can be a long job.
Check the 700/900 FAQ via the features pull down menu for instructions on this. There are some pics too.
Resolder the fuel pump relay while you're at it.
My '86 744Ti has 279,000 miles on it.
BTW, the fuel pump relay also powers the AMM, at least on the LH 2.2 cars.
One other thing, the later engines used LH 2.4 and the temp sensors are different. Check the sensor with a VOM for resistance at different temps. There should be a chart in the FAQ. Also, the LH 2.2's Got their timing signal off the distributor while the 2.4's were off the flywheel.
Go check these areas and get back to us.
I hope this helps.
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