1981 Porsche 928 Auto

I recently purchased a 1981 928 with 45,000 original miles from Vegas and paid $3950 for it. I drove the car to Denver with no problem. Over the past several weeks, I have had the timing belt and water pump changed. I also replaced all of the vacuum lines, spark plugs, added a K&N and new tires.

The car starts at high RPM and takes forever to idle down. It also burns real rich. I did take the car from a low elevation to the mile high at which my house is at 5600ft. Any suggestions? Did I get a good deal?

Thanks in advance.

 

No Ideas?

 

i cant answer, but it might be ur title that hasnt gotten attention. Might want to rephrase it.

 

There is a big slotted screw on the front of the throttle body (actually just under it) that sets the amount of air that bypasses the throttle plate at idle. That will adjust your idle speed. Adjust it when the engine is warm. I'm not very familiar with L-jet cars, but you should have a mixture pot somewhere on the AFM (barn-door air flow meter) which is under the airbox.

Rich running can be caused by the diaphragm in a fuel pressure regulator or damper to fail. Check the vacuum lines that run to the fprs and damper for fuel in them.

Don't be too worried, the L-jet system is pretty much bulletproof.