I've got the above on my saph in my MSD chip, it plays up once the engine gets to 70 degrees c then it revs up and down with the afr fluctuating between 14 and 16 erratically , any ideas what's up ? I've tried to get through to James but had no luck so far today. I've left the lambda sensor unplugged for now and it's idling great again will it be ok like that ?

 

I have the same problem mate!!!check your lambda sensor if it works!! i have damaged 4 sensors!! and i found the solution with my AFR PLX gauge,not perfect idle but supportableness,as my chip is not live map.

 

Not being funny but why are you assuming it's a closed loop lambda problem?

 

I'd definatley say it was Lambda related if he unplugs it and the probem goes away.
Rich

 

You have to keep them wired in but remove the middle wire or it will fuck up, but it sounds like sensor is goosed

 

The sensor came off a good working car chris so kinda ruled that out, once unplugged the revs rise from 980 at hot idle to around 1080, don't know if that'll help pinpoint what's wrong ?

 

Possible but not concrete. To me all that means is it's trying to correct all the time, then it can't because it has no reading to go off of when it's unplugged, so it just stays constant.

 

try to test your lambda like in this video and let us know pal!

 

give me a ring in 5 mate,

 

Sorry J, just finished work now, will try you again tomorrow.