Need to solve engine rough idle and moderate speed.

[jerryk]

I just picked up a second red 90-240SX hatch(new). I plane to use this car as the body and my (old) red 240SX as the parts car. Everything in my old 240SX is running perfectly the engine has 210K and I have owned and taken car of it all these years. The problem with the old car is the underbody is almost completely gone and that is the reason for the (new) car. The plan is to take the best parts from each and create one car. Both cars are stick and have the same colors. The only difference between the two is the (new) car has ABS, which I plan to dump.

Problem:The (new) car engine with 175k, which I was thinking of keeping, is rough at idle it is also rough when you accelerate moderately. I checked the plugs and they looked clean. I had a compression test and the results are posted below. I changed the oil, plan to change the rotor wires and plugs but I do not think this will help. Fast acceleration is good milage not too good 22mph. I am not sure that the problems are related. What should I look for next?

Nissan 1990 240SX Wet and Dry Compression test CYL 1 CYL 2 CYL 3 CYL 4DRY 155 156 155 158 12.90% 8.97% 13.55% 13.92%WET 175 170 176 180

Remember my (old) car can be used for parts.

[slyedog240sx]

did you open the throttle body on the compression test?Those are pretty low numbers if you did.

[slyedog240sx]

did you open the throttle body during the compression test?Those are pretty low numbers.Right at the minimum.

[jerryk]

I took it to a garage and they removed all the plugs and cranked the engine 5 times for each cylinder. Then they went back and put some oil and redid the procedeure. Not sure, I understand should the black rubber tube be removed from the ECCS.