Lean on deceleration question.

[iwantatermi]

Okay I've been looking around on different forums and I can't really find a good answer. So can someone please verify this for me. I drive a 2001 Lightning with a few bolt-ons; full exhaust, cai, upper pulley, etc. When I'm driving on the freeway going around 60mph and I let off the throttle to exit the freeway, my AFR gauge pegs lean and you can also feel it in the truck, it's like it falls flat on its face. Is this normal at deceleration or not???

 

[Dusten]

Going on lean on decel is quite normal. I made a video a while ago of all the different AFR's and situations.

 

[AznPrswayzn]

Yup perfectly normal. If it stayed stoich on deceleration then the car/truck would hardly engine brake at all

 

[iwantatermi]

Going on lean on decel is quite normal. I made a video a while ago of all the different AFR's and situations.

Okay I'm glad to hear that! I've been thinking something might be wrong with the truck, considering it's pegging out my AFR gauge lean on decel. Thanks for cleaering things up for me!

 

[iwantatermi]

Yup perfectly normal. If it stayed stoich on deceleration then the car/truck would hardly engine brake at all

Makes sense, I've been thinking something might be wrong with my truck, since it's pegging out my AFR gauge lean on decel. Thanks for clearing things up!