2010 camaro, stumble after 2500rpm shift

[Phil99vette]

I've got a car I've been working on this afternoon and the only thing that I can cure is a slight stumble at low throttle position after shifting around 2500. Shifting at 2500 drops RPMs back to 1500 and it will stumble for a split second and than clean up. MAF has been tuned, A/F is 14.5-14.7 cruising without any O2 input and 12.6-7 at peak torque and 12.9 at peak hp.

[INTMD8]

What type of induction? If fabricated how stable is the maf output?

I've only seen what you describe occur on fabbed intakes where the maf sensor is located too close to a bend radius. Other than that I would log torque management.

[IDRIVEAG8GT]

Sounds like MAF error to me.

[Phil99vette]

What type of induction? If fabricated how stable is the maf output?

I've only seen what you describe occur on fabbed intakes where the maf sensor is located too close to a bend radius. Other than that I would log torque management.

Its got the filter off to the driver side with a straight pipe runs behind the radiator turns 90 degrees into the throttlebody. The straight pipe is maybe 12-18" long and turns right into the TB. The MAF is almost at the end of the straight section before the turn. I dont think that is the problem.

[Phil99vette]

Sounds like MAF error to me.

I am going to retune it on a load cell dyno and spot check the A/F on sunday.

[Mep_q8]

can u post up a file... if you've tuned the maf only, it might be the transition from a certain set of Hz on the Maf table that have had too much fuel added to them...

[edcmat-l1]

Its got the filter off to the driver side with a straight pipe runs behind the radiator turns 90 degrees into the throttlebody. The straight pipe is maybe 12-18" long and turns right into the TB. The MAF is almost at the end of the straight section before the turn. I dont think that is the problem.

Can you relocate the MAF to the other end of the straight piece of pipe? In other words, get it away from the bend.