HI guys. I have noticed low power in my H2 2003 50000miles. What could it be? Fuel and air filter ben changed. To early for plugs. Maybe CAT. What you sugestion? Thank you very much.
I think you would through a code if it was the catalitic converter. But it could be possible. Take a look at the MAF screen and make sure its clean. Also try a FI cleaner on your next fill up. Deposits on the Fuel injectors is a possiblity. I also replaced my Spark plug wires with some MSD's on my H2 a while back and I noticed a change in response.
Starting point- I would at least check the plugs for coloration and re-gap if needed. Take a look at the chart below, a good diagnotic tool is looking at the plug.
< Message edited by Justin -- 11/21/2007 10:19:27 AM >
I am probably gonna change the plugs. What model is better? And is it possible to change them my self(i mean accesble)? One more thing i forgot to tell yestereday is: When iam driving and making quick stop iam noticing downshift like kicks from shift like 3-2 and 2-1 it depends how fast iam going. I did use before injector cleaner(GM recommended). Thanks for help.
I dont know how much power i lost, but definatly when i bought it last year it was better. What should i use for MAF cleaning. I am in NY so close stores is Autozone and Strauss. I have couple of more problems but i have to move them to electrical forum. Thanks again.
I change spark plugs on Sunday still the same. How and what ihave to use to clean MAF sensor. And When usually you changing sparkplug wires(what milege).
Just a light application of Carb cleaner should do it. The wires can last a long time. I changed mine at 45 with MSD wires. You can get a set at MTI, a vendor here at HTN for a good price. Just let them know your a member of Hummertech.
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