MER Mafless o2"s at idle ?

[KWIKR 1]

What are you guys getting for o2's at idle on the mafless MER ? I'm in the 800-825 range with the fuel set at 40 PSI line off (75 lb injectors).IMO I think I'm a tad rich . Thanks .

 

[Eric Stage I]

800's are pretty typical at idle, although a wideband is a more accurate way to tell. You can take the idle fuel down 1 or 2 numbers to lean it out a smidge.

 

[KWIKR 1]

I thur a new NGK o2 sensor in and the 02's are showing 925 . and the drive idle is real bad . I'll have to lean it out a bit . Thanks .

 

[KWIKR 1]

Well it seems this 218/218 roller cam and stroker combo like a rich idle in the 900 range hot . if I cut out fuel on the MER it starts to idle like crap more so in the drive idle . When I first start it up from cold 02's are real lean till it wams up . I guess it's best to tune by what the engine likes rather than off of guages .