question for tuning guru
Thread Starter
Drifting
Joined: Nov 2003
Posts: 1,288
Likes: 2
From: tucson az
question for tuning guru
vehicle has mild cam , heads , lt's and all the bolt ons.. 4.10s with a4 stock converter.....[ do my tuning with ls1 and wideband]
having a problem with running rich at high speed....it seems that cruising above 3200 on the hiway i start going rich....almost like the COT [ cat overtemp mode]is coming on....
did have it tuned pretty well...and i am trying to tackle this issue....any thoughts from you tuning guru's?
having a problem with running rich at high speed....it seems that cruising above 3200 on the hiway i start going rich....almost like the COT [ cat overtemp mode]is coming on....
did have it tuned pretty well...and i am trying to tackle this issue....any thoughts from you tuning guru's?
Pro
Joined: Dec 2000
Posts: 747
Likes: 0
From: Columbia SC
Sounds like the COT might need to be disabled. Is this under WOT or just around on the street? You didn't mention the dyno. Have you dyno tuned it to verify the A/F above 3200RPM's? Maybe your tune is just way off..........
Mike
Mike
Thread Starter
Drifting
Joined: Nov 2003
Posts: 1,288
Likes: 2
From: tucson az
i raised the cot temps 150* across the board....does not run rich now.....anyone have experience with modifying the cot table and running high flow cats?....is the cot necessary to prevent cats from overheating? does it apply to high flow cats??? any insight would be appreciated>>>> 
