ECM questions - ZR-1 Net Registry Forums

tomtom72 · 09-06-2005

Kevin, Thank you for your time and effort on this! I've read so much about pulling the plenum that it almost seems less daunting! I've started buying parts for under there already. Just small stuff but I think , RC if I'm correct, I'll just go on & replace all the injectors as a pre-emptive measure. I have the sort of luck that whatever I don't replace under there, will bite me soon after I close it up.

There is a guy on CF forum that says you can check the ohms on any primary by using the pins in connector A, primary injectors are all there; and the ECM 12 volt feed in connector B. I did that & got 18 ohms for the complete circuit on all the injectors. I just wish I knew if my results are valid. I figure if the injectors should be between 12 - 15 ohms, then all the wire & the pins = 3 ohms. It sounded reasonable to me but then what do I know.

I also wounder if the "limp home mode" is a myth or fact? If fact what would the car run like in that mode? If it goes lean on all cylinders so as not to go rich & ruin the cats? Just too much I don't know & what's worse I can't find anything to read to educate myself. Should have gone to GK's school before buying this car.
Anyway thank you & everyone else for the generous help & advice!
Tom

09-06-2005	#11
tomtom72 Join Date: Dec 2004 Location: Jacksonville, FL USA Posts: 4,609	Kevin, Thank you for your time and effort on this! I've read so much about pulling the plenum that it almost seems less daunting! I've started buying parts for under there already. Just small stuff but I think , RC if I'm correct, I'll just go on & replace all the injectors as a pre-emptive measure. I have the sort of luck that whatever I don't replace under there, will bite me soon after I close it up. There is a guy on CF forum that says you can check the ohms on any primary by using the pins in connector A, primary injectors are all there; and the ECM 12 volt feed in connector B. I did that & got 18 ohms for the complete circuit on all the injectors. I just wish I knew if my results are valid. I figure if the injectors should be between 12 - 15 ohms, then all the wire & the pins = 3 ohms. It sounded reasonable to me but then what do I know. I also wounder if the "limp home mode" is a myth or fact? If fact what would the car run like in that mode? If it goes lean on all cylinders so as not to go rich & ruin the cats? Just too much I don't know & what's worse I can't find anything to read to educate myself. Should have gone to GK's school before buying this car. Anyway thank you & everyone else for the generous help & advice! Tom __________________ 1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member