Valve-Floater

This is my 3rd conv guys. My 1st with a 98 Harness & PCM.

I have a wierd delima when I go to start it. I will get a quick pulse from the coils when the key is turned on? Other than that I have No spark while cranking. I went ahead and swapped out CKT sensor (crank) to no evail... Does this sound to be a Sensor malfunction (CAM or CKT) ? I have checked my power and grnds to the pcm several times... Im just against the wall right now and some input right or wrong is appreciated, Thanx Virgil


Car is a RX-7 with a 1998 Ls1, T-56

ls1nova71

iTrader: (4)

Have you made sure you have power while cranking? Sometimes a wire will have power with the key in the run position, but will not have power while cranking.

GENIIIDude

Also check the VATS

Valve-Floater

VATS has been disabled.

I double checked for 12v while cranking already.

Ont he CKT sensor or Crank sensor has the 3 wires..yellow-yellow/Black-light green. Just for the yeck of it I checked for power there while Key on position and had nothing? Thats where Im at now. Is there supposed to be a power-grnd-signal?

GENIIIDude

Which editor are you using?

Pocket

iTrader: (22)

Crank pos sensor connector

A Dk Blu/Wht 5v signal
B Yel Low Ref
C Lt Grn 12v Ref

You should get 12v at pin C with the IGN on

If you've double checked your power circuit at the PCM, check the crank circuit to the PCM. Remember the 98 pinout is different than the 99-04's

If the circuit checks out, then you've got a bad/wrong PCM