Hesitancy - possible yaw sensor issue?

[Oriskany]

My X type 3.0 2005 hesitates in a "misfiring" sort of way when accelerating in mid rpm. It goes through a lumpy phase of hesitating which can be felt in the car, and it soon clears up but it does affect performance.

I have read plenty about this on line but seemingly no solution. My question is could the hesitancy be due to the brakes being applied in response to a yaw sensor erroneous output? Also, which unit would "apply the brakes" in this situation, is it the ABS modulator at the front right of the engine bay? If so I could test my theory by unplugging it for a while.

[Micktoo]

Steve, I had a similar hesitancy issue with my 07 x type petrol 3.0  I cleaned the Mass Airflow Sensor (MAF) and the Intake Air Temperature Sensor (IAT) and it solved the problem.  Both of these sensors are located directly downstream from the air cleaner.  There is a video online that shows this process.  I didn't remove the MAF as it shows, just opened the butterfly and shot the MAF that way.  I bought a pressurized can of MAF Sensor Cleaner at my local auto parts store for about $9.50  This stuff doesn't leave a residue and drys quickly.   Try it.  It can't hurt and will probably help your performance.  If you have one of those nasty Oil coated air cleaners, pitch it in the trash and get a plain old paper filter.

Mick

[Oriskany]

On 19/02/2017 at 5:26 AM, Micktoo said:

Steve, I had a similar hesitancy issue with my 07 x type petrol 3.0  I cleaned the Mass Airflow Sensor (MAF) and the Intake Air Temperature Sensor (IAT) and it solved the problem.  Both of these sensors are located directly downstream from the air cleaner.  There is a video online that shows this process.  I didn't remove the MAF as it shows, just opened the butterfly and shot the MAF that way.  I bought a pressurized can of MAF Sensor Cleaner at my local auto parts store for about $9.50  This stuff doesn't leave a residue and drys quickly.   Try it.  It can't hurt and will probably help your performance.  If you have one of those nasty oil coated air cleaners, pitch it in the trash and get a plain old paper filter.

Mick

Thanks. I'll give it a go and post the result.

[JOE-DOT-COM]

Hi

Maf is a favorite , don't think its a yaw sensor

A lot of people like me replace the standard air filter with a K&N, for better filtration and better air flow

but with K&N you get a side effect of the oiled filter is, that some of that Oil get carried on to the MAF sensor, so if your using a K&N filter, you need to clean the maf aswell, I do mine twice a year, just remove it, clean it by spraying the cleaning fluid on it, then leave it for 5 mins to dry and replace

cheers

Joe

[JOE-DOT-COM]

Hi

Is the car using any Oil

if so have a look here

[Oriskany]

12 hours ago, JOE-DOT-COM said:

Hi

Is the car using any oil

if so have a look here

Thanks for that - My MIL light never illumenates and there is nearly no Oil consumption despite 130k miles.

[JOE-DOT-COM]

hi

Have you tried getting it plugged in

Just in case there's any stored fault codes, might give you a better idea

cheers

Joe