Need some more help. have 90 hatch w/ D15B2 engine. Engine is missing and sounds like its running on 3 cylinders. So far I have replaced rotor button, distributor cap, plugs, and wires. Also dissasembled the distributor and cleaned all connections with carb cleaner and blew it out with air compressor. Any suggestions?

Thanks,
Jason

 

Check valve adjustment. A valve too tight will cause misfiring / dead cylinder especially at idle.

See if it is consistently one cylinder is not working, and if so which one. The pulling the spark wires off test is somewhat risky of blowing the coil, but it's about the only way to do it on the DPFI (on MPFI, you would disconnect the fuel injectors one at a time). Have a grounded test wire to put into the cap socket so the coil doesn't fire into an open circuit.

 

k thanks, i will check the valves and i appreciate the advice