11.5 AFR at Idle
05-14-2009, 05:59 PM
#1
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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.
05-14-2009, 06:28 PM
#2
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
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
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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
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
05-14-2009, 06:42 PM
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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.
