Stuttering under mild acceleration

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26-12-2008, 05:23 PM
TD

Stuttering under mild acceleration

Tech question time!

I've got some stuttering under mild acceleration, wondering if anyone thinks it could be SRI or MAF related?

I have a Mazdaspeed CAI which is in SRI mode (lower pipe not installed), no other mods.

Recently I've been getting some stuttering under mild acceleration...lasts about 2 seconds until wooooosshh happens...it's starting to annoy me a tad. Anyone reckon it could be the airflow over the MAF sensor as a result of the SRI or the MAF sensor itself may actually be dirty?

The airfilter is due a clean, will do that this weekend and see if anything changes. Also tempted to rig up some airflow straighteners in the SRI to see if that makes a diff.

Any ideas out there?
26-12-2008, 07:35 PM
GGG

Many km's on the car?

I never got one stutter until I hit 40,000 (still pretty rare for me).
26-12-2008, 07:35 PM
zippymps3

welcome to summer in queensland and a top mount intercooled turbo.
26-12-2008, 07:36 PM
GGG

Quote:

Originally Posted by zippymps3

welcome to summer and a top mount intercooled turbo.

Combination of the above would suck away power (lower bosst etc) but should give you a stutter.
27-12-2008, 08:48 AM
TD

Quote:

Originally Posted by ggg

many km's on the car?

I never got one stutter until i hit 40,000 (still pretty rare for me).

20,000
27-12-2008, 08:48 AM
TD

Quote:

Originally Posted by zippymps3

welcome to summer in queensland and a top mount intercooled turbo.

Wondered if it could be this too...:shrug:
27-12-2008, 11:28 AM
Nuliaj

Stuttering isn't generally a sign of heat imo, it seems to be more an issue with fuel/air ignition. Things to check for - maf and spark plugs. If you have one dashhawk logs would be useful.
28-12-2008, 09:00 PM
TD

Result!

Cleaned the MAF and air filter today, no more stutter :)

Used some CRC Contact Cleaner to clean the MAF, was a bit dirty...had to do a few sprays for all the gunk to disappear.
28-12-2008, 09:25 PM
zippymps3

Glad it's fixed that easy.
29-12-2008, 06:09 AM
TD

Quote:

Originally Posted by zippymps3

Glad it's fixed that easy.

Yeah, so was I. Was surprised how much crap was visible on it, makes me question the filtering properties of the standard filter that comes with the CAI...going to clean it a bit more regularly now.