Quote:
Originally Posted by David Pozzi
Jim,
I'm so glad to see you posting about tuning instead of about welding! 
Just an FYI. The One Lap Camaro has the MEFI4B system, Wideband was added, but even though the ECM can use the signal you have to add another MFR's add on box same as you are doing to run the heater and produce a signal the ECM can read.
Anyway, we were having terrible trouble with the TPS signal when trying to dyno tune the system, even with engine stopped, key on, the TPS voltage was jumping around and the dyno operator said he couldn't tune it that way.
What we found was the Wideband controller was grounded to the same point as the ECM and it was causing the ECM ground voltage to be biased up and down like crazy.
I would try and ground your wideband somewhere else just in case.
David |
Thanks for the tip. I have already had enough troubles with the system and just when I get it going I surely don't need to go right back into more problems.
It's more fun to tune than to weld too. The sound of a running car has been a long time coming. I have to weld in the new O2 bung though ,so there we go back to welding,lol Fortunately I am replacing my collector reducers for better flow and gasket seal so I can do both jobs at once.
Are you coming to the Motorstate Challenge again this year? The ride in Penny was GREAT FUN and it is always nice to talk about everything with you.