Guys,

Anyone with access to their 7730 ECM (1990-92 TPI Camaro/Firebird), I could use a big favor. I'm trying to diagnose an idle misfire and I was doing a circuit check on my EFI harness. At the distributor reference wire (ppl/wht stripe on the ECM connector), it's showing .6 volts on mine, but the manual says it should be 2.3 volts (with the engine running).

Could someone please take a voltmeter to that wire on their car and let me know what you see? I'd really really appreciate it.

Thanks in advance.

 

Ignition missfires occur throughout the rpm range...idle misses are usually vac leaks, or valve sealing problems(dirty lifters etc)..