too lean at idle cel

[dealler_81686]

i changed my dp and installed a rp in my 07 ms3. now i get a cel saying too lean at idle. does anyone know how to get rid of this?

[AutoXRacer]

What kind of intake do you have?

[SuperStretch18]

Tighten all of your intake connections...

[dealler_81686]

i have the mazdaspeed cai

[clos561]

there was a recall for this cell, lean at idle code. dealer flashes ur ecu and if that didnt work they did something else (forgot)

[BSTD3]

ECU reflash and then if that didn't help, replace fuel pump...

[SuperStretch18]

Before you go to the dealer with mods, check all of your fittings. Too lean at idle could be a case where you are just pulling in unmetered air. You would be bleeding and running rich in boost, but that wouldn't necessarily trigger a code. Some have had issues with loose connections from the dealer.

Did you use a dashhawk to read the code? If so, have you tried to log A/F ratios?

[dealler_81686]

well i just checked all the fittings on my intake. didnt find anything really loose and i reset the cel. ill let you know if it comes back

[AutoXRacer]

Make sure to also check your turbo and intercooler connections.
I found a lot of stock clamps loose...

[dealler_81686]

well i tightened everything down and i started the engine. the cel came on while i was setting up my ipod. i am getting really pissed off at the damn thing!!!

[AutoXRacer]

well i tightened everything down and i started the engine. the cel came on while i was setting up my ipod. i am getting really pissed off at the damn thing!!!

It's dealer time!!!(hand)

[dealler_81686]

what are they going to check? i heard about an ecu re-flash.

[ericrapp]

Mazda is going to help and I will report. the stock stuff was often loose. but the hot side intercooler piping went soft and distorted. I cooled it down and replaced valve too. I have Mazdaspeed cai.. And I am sure there is more to this in ecu reading and responding.

[AutoXRacer]

what are they going to check? i heard about an ecu re-flash.

There is a reflash and a fuel pump replacement if your car falls between the affected VIN range.

Here is the info:

[SwampAss]

My AFRs were a touch lean with the MS CAI @ idle. I changed to an Xcel-intake and through a cell for rich at idle. Once I put some miles on it, I stopped getting those CELs. My AFR is back to 14.7 @ idle but it creeps slowly from 14.0.

With the MS CAI, it seemed to race to 14.7 in a second just off idle.

[dread]

Your car will adjust the long term fuel trims to prevent the cel it takes at least 20 miles though.

[ericrapp]

There is a reflash and a fuel pump replacement if your car falls between the affected VIN range.

Here is the info: Yep, that is what he showed me. Tomorrow! oh boy!

[dealler_81686]

is it a big deal if the dp i installed is a non-cat dp? would that do it? i want to change to a cp-e dp soon. will that make a difference?

[AutoXRacer]

is it a big deal if the dp i installed is a non-cat dp? would that do it? i want to change to a cp-e dp soon. will that make a difference?

The only difference a catted to non-catted DP will do is not let your cabin smell like raw fuel. Some owners of non-catted DPs after a few months have complained about fuel smell in the cabin... But that would be the only difference...oh, and the people driving behind you that you'd be suffocating.

I personally prefer the catted, much easier to live with and it only costs you 4-5 horsepower.

[dealler_81686]

i see, thanks for the imput

[MS3BOOST]

i got my tbe installed and the lean at idle code keeps coming up for me too