U7192 06 Hummer H2 Throttle Hesitation

[HumVtwo]

Hello,

I have installed the 87 tune and Performance tunes and I still get a throttle hesitation. If I set it back to stock programming the hesitation goes away? I have K&N intake with the Granitelli MAF and Borla cat back. Any ideas?

[mikel]

Try replacing the MAF with the stock unit, as this is likely the issue.

Thanks

[tomp]

I have an 06 H2, Grantatelli MAF and airaid with U7192. I have no throttle hesitation at all.

Are you possibly checking this at idle?

[HumVtwo]

No, more so when driving. Either when coming to a slow roll and then accellerating. It just doesn't seem to accellerate or kick down quickly like it did on the stock tune? I live in the hills and my street is a hill that winds around up to my house. I'll be going uphill about 35-40 mph, slow down for the corner and it seems to stay in a higher gear and doesn't kick down so it will start to bogg down almost then finally it will shift down. How is yours on the freeway? Before on the stock tune it even seemed quicker on the freeway and or pulling a trailer? I went to Las Vegas a couple weeks ago and I was only pulling a little 15 ft inclosed trailer, nothing heavy and I ethier had to go up the hill at like 50 mph or really step on it to get it to go. Then i'd be going 80 but also at like 45K on the tach. It just seems to be sluggish with the 87 Tune on it.

Thanks for the info.

[johan]

Due to the variances we have seen on MAF calibrations in aftermarket MAF's i would recommend to try it out with the stock maf and eliminate that possibility before we continue. it could be that your vehicle is adding a lot of fuel during cruise due the to maf cal and when you want to punch it it is too rich at that point and thus causing a hesitation.

[tomp]

HumV, have you tried disconnecting the battery after loading the tune and then allowing the ECM enough time to see if it can compensate?