Low power

Low power

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Low power - 5/7/2007 7:50:20 PM

ysteve

Posts: 17
Joined: 5/5/2007
Status: offline

Hello. I think i have low power, toruqe not so V6.0. I drived my bosses Denali(samev6.0) and it seems to me taking off faster. I dont know maybe it is right, maybe it because body H2 is very heavy. I have 2003, H2, 50000m, fuel and air filter was changed.
What you think guys?

Post #: 1

RE: Low power - 5/7/2007 8:44:25 PM

Justin

Posts: 923
Joined: 8/2/2006
Status: offline

Hey Steve, I know exactly what your talking about, I have an 03 as well. Sometimes it runs great and others it seems slugish. I also noticed that the radiator fan takes alot of the power out. That reminds me, anyone have any fan cluch issues? ti seems to come on at odd times.

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Post #: 2

RE: Low power - 5/8/2007 8:20:24 AM

ysrjunkie

Posts: 153
Joined: 8/30/2006
What State or Country Texas
Status: offline

One thing I've found on H2's that could cause what you are talking about is an air filter not fully seated correctly and allowing small pieces of leaves to get caught on the mass air flow screen. If that happens, it can cause incorrect air readings which affect timing and fuel. I have also seen over-oiled aftermarket air filters cause performance issues. the oil from the filter will coat the mass air flow and taint the reading. Hummers are slower than the Denali's due to the shape of the vehicle and large ammounts of rotating mass. Them tires are heavy.

Post #: 3

RE: Low power - 5/9/2007 6:06:01 PM

ysteve

Posts: 17
Joined: 5/5/2007
Status: offline

I dont think about the fan. Can i clean MAF with maf cleaner(from Autozone). And i wanna ask, did someboby had before transmissions problems ever. I am asking because all cars i had before had trans problems(Impala, Probe, Caravan). I am kind of crazy afraid about transmissions?

Post #: 4

RE: Low power - 5/9/2007 9:15:41 PM

NewtonsLaw

Posts: 400
Joined: 8/10/2006
What State or Country Texas
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I don't think there is actually MAF cleaner, but if there is i don't see a problem in doing it. Another thing you might do is run some fuel injector cleaner through with your next fill up.

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THE LAW

Post #: 5

RE: Low power - 5/9/2007 10:39:28 PM

Justin

Posts: 923
Joined: 8/2/2006
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quote:

ORIGINAL: ysteve

I don't think about the fan. Can i clean MAF with maf cleaner(from Autozone). And i wanna ask, did someboby had before transmissions problems ever. I am asking because all cars i had before had trans problems(Impala, Probe, Caravan). I am kind of crazy afraid about transmissions?

The 4L Series Transmissions are very stout units. I have seen up words of 800HP at the rear wheels on the 4L60E on a Camaro. I wouldn't worry to much. However you never know, it could have been a Friday or Monday at the factory trans builder depending how you look like it!!!

J

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Post #: 6

RE: Low power - 5/10/2007 7:44:26 PM

ysteve

Posts: 17
Joined: 5/5/2007
Status: offline

Thank you guys. BTW i did run two bottles Gm injector cleaner. Maybe its normal , maybe i just trying to fing problem wich doesnt exist. I wanna ask one more thing: when iam sitting in the car it feels like missfiring, for plugs is early. I have 2007 ford F-150, i bought it brand new and its kind of doing same thing. Is it normal? Or it should run smooth?

Post #: 7

RE: Low power - 8/19/2007 10:22:51 PM

tomp

Posts: 5
Joined: 8/19/2007
Status: offline

all new GM vehicles have Torque Management which gets enable, thus reducing timing, under various conditions. To disable TM, get a Predator Tuner

Post #: 8

RE: Low power - 9/14/2007 10:54:35 PM

h2dan

Posts: 6
Joined: 3/10/2007
Status: offline

i have a 03 h2 and a 03 escalade ext(awd) the escalade blows away my h2.the h2 is so heavy but rides a little better.both are on 24" wheels. but the h2 came alive with my hypertech programmer.

< Message edited by h2dan -- 9/14/2007 10:56:56 PM >

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03 H2
03 EXT

Post #: 9

RE: Low power - 2/11/2008 10:15:51 AM

lecustoms

Posts: 1
Joined: 2/11/2008
Status: offline

The H2's have a different cam from the Denali's and the escalades(if I remember correctly). Not to mention the tire size. I had two escalades before I bought my H2 and without a doubt they were alot faster off the line then my H2. Highway passing was also alot easier also.

Post #: 10

RE: Low power - 2/14/2008 1:45:56 PM

hummasta

Posts: 184
Joined: 1/8/2008
What State or Country NOR-CAL
Status: offline

I have this low power issue....In my H3!!!!!!