11.5 AFR at Idle
11.5 AFR at Idle I am trying to help a friend tune his car at the dyno. No matter what I change on the injector flow rate the car runs at 11.5 : 1. The long terms are at -15 then go to -8.
My question is is there a desired AFR in the ECM that might be messed up. The dude bought the car used so who knows who tuned it. Also does anyone have a stock 99 M6 file that I could get so I can compare.
Thanks. I am using EFI Live.
My question is is there a desired AFR in the ECM that might be messed up. The dude bought the car used so who knows who tuned it. Also does anyone have a stock 99 M6 file that I could get so I can compare.
Thanks. I am using EFI Live.
NB O2 sensors could be shot. Could have a vacuum leak, an exhaust leak, a ported MAF, or any number of variations from stock that can monkey with his A/F ratio.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
I put a stock maf back in. the O2's match the dyno afr's. The car has 42 lb injectors with a Procharger. We have not started any other tuning since I cant get it to work at idle or cruising speeds.
The oil is way fuel saturated. I am going to see if that helps. We know in about 20 min.
I just found out that he drove the car for 2 weeks with no tune. So I think maybe the oil might fix it.
thanks for the input.
The oil is way fuel saturated. I am going to see if that helps. We know in about 20 min.
I just found out that he drove the car for 2 weeks with no tune. So I think maybe the oil might fix it.
thanks for the input.
