Rough idle/no rev problem

[tada]

Originally Posted by particlewave

I know it's 5 pages long and a lot to read, but a lot of your questions have already been answered by the OP.

It is too much to read. So here's a summary.

Bought a non-running 1998 Base Boxster with 96000 miles. stored in a barn in the desert south of Sierra Vista, AZ about 10 miles from Mexico. I could find no one in Phoenix or Tucson to go there and do a PPI.

Replaced:
Spark plugs
Spark plug tubes
Fuel filter
Fuel pump
Fuel sender unit
Fuel pressure regulator
AOS and J-tube

Fuel pressure test is 3.8 bars, no real leak down
Compression test numbers are above
Have spark at all spark plugs
Noid light shows all injectors firing
Corrected the vacuum leak at the intake manifold
Cleaned the MAF. Car will not start if MAF is disconnected

So at this point, I should have fuel, air, and spark. I have not tested the O2 sensors. No CEL is being thrown. Durametric shows no codes being thrown. I also have not cleaned the IACV or the throttle body.

I think that's about it. At this point, I'll install the new spark plugs I have and give it a go.

[911monty]

Tom; I think your compression numbers are way low. Even cold you should see 145 psi or more. Hot compression should be 180+ psi. Since plugs are out a simple test might be to get a helper and some chopsticks then with chopstick on top of piston mark chopstick at TDC then roll engine by hand and get BDC measurement all cylinders. Then compare to each cylinder.