Induction system Cleaning

[H2 BULLY]

When and how often should you have your induction system cleaned. I am at 16000 miles and my dealership is already telling me to do it, but I find nothing of the sort in the owners manual. I just want o make sure I am not doing it too soon or if it needs to be done at all with all the additives in fuel these days to help keep your engine clean.

[HummBebe]

Originally Posted by H2 BULLY

When and how often should you have your induction system cleaned. I am at 16000 miles and my dealership is already telling me to do it, but I find nothing of the sort in the owners manual. I just want o make sure I am not doing it too soon or if it needs to be done at all with all the additives in fuel these days to help keep your engine clean.

Read your manual......

[lennyrebel]

Originally Posted by H2 BULLY

When and how often should you have your induction system cleaned. I am at 16000 miles and my dealership is already telling me to do it, but I find nothing of the sort in the owners manual. I just want o make sure I am not doing it too soon or if it needs to be done at all with all the additives in fuel these days to help keep your engine clean.

Induction is air filter element isn't that about 50,000 miles or the old mechanics trick ,pound it upside down on your knee and blow it backward with an air gun. Fuel injection system ,leave it alone if it isn't giving any trouble. lennyrebel

[H2 BULLY]

Originally Posted by HummBebe

Read your manual......

GEE THANKS

[H2 BULLY]

Originally Posted by lennyrebel

Induction is air filter element isn't that about 50,000 miles or the old mechanics trick ,pound it upside down on your knee and blow it backward with an air gun. Fuel injection system ,leave it alone if it isn't giving any trouble. lennyrebel

I mean the Fuel injection, where they flush your your fuel injectors I guess.

[lennyrebel]

Originally Posted by H2 BULLY

I mean the Fuel injection, where they flush your your fuel injectors I guess.

Well than I think you got it right there should be enough stuff in fuel to take care of injectors. If its running good don,t touch it. Your service engine light will let you know if there is a problem. Sounds like a dealer scam to me. Regards The Rebel

[MONSTERMATT]

BULLSHIIIIITTTT FUK THE DEALER

[Trinity]

On my old Tahoe and Avalanche, I used to clean the carbon from intake. I don't know what the H2 looks like under the hood (I have an H3; my H2 SUT is on order! ), but basically follow the black hose from the air filter box to the top of the engine. Unscrew the metal bracket the holds the hose on to the metal intake and look inside. You should see a flap-plate. Push either the top or bottom to open and look inside. You will probably see some black carbon buildup. Buy some injector spray cleaner (about 2 or 3 bucks at Autozone), put a paper towel under the intake on the outside and spray that cleaner on the inside wall while holding that little flap open. Then take another towel and gently clean where you just sprayed. Then put the hose and clamp back on and start your engine!

Your engine will be a little difficult to start at first, and might even cut out, but then she should fire right up. Just double check the instructions on the can.

Like I said, I used to do this about every 10,000 miles on my old Tahoe and Avalanche, and it really helped out. I would find that when the carbon would build up, the idle would be a little rough and the power seemed less when the air conditioner was on. I don't know about the H2 and might be way off base here, but it was a good tech tip on those vehicles.

Good luck!
Trinity

[JamesT]

Originally Posted by lennyrebel

Well than I think you got it right there should be enough stuff in fuel to take care of injectors. If its running good don,t touch it. Your service engine light will let you know if there is a problem. Sounds like a dealer scam to me. Regards The Rebel

I didnt do mine till I had 72K. I dump some STP Fuel Injector Cleaner every 4th fill up. Seems to have done fine.

Hummer Dealer wanted over $400.00 bucks to do it. I took it to a local Ford dealership (cuz I buy lots of fleet trucks there) and they did it for $120.00.

[HUMMERcustoms.com/TAZ]

The GM throttle body butterfly on the fuel injection systems have had a history of random tighter than spec tolerance when the throttle body was machined and pollished down to tollerance. Just random like any other parts have same issues sometimes.

You do as mentioned already and clean it yourself. But, I would not worry unless you get the throttle feeling like it is hanging up giving you a fluctuating idle speed. You can even have such a trouble that you will let up on pedal and you will not fill it come back to normal position which of course means higher RPM and having to use more brake to stop.

I experienced it badly with my new 1999 Silverado and at first had to clean the area right where the butterfly closes to meet body wall and as carbon built up it would stick and have a higher idle. It got to where I was having to do it to much and I went in to the dealer and found out that on my model truck they had a silent recall to check and replace the throttle body itself when tolerance was checked to be off with complaint of high idle or throttle sticking.

It has not been an issue on any more GM rides I have had but, know of it happening to others. I have since going through the problem with my truck just tell them what it may be.

I have not heard of the problem on any other brands but, not around many with other brands to hear much if it is happening. I would think carbon building up would occur on any throttle body intake at some point unless it is handled by using a greater tolerance.

I should say it looks like carbon build up but, with it not in an area of combustion it really would most likely be just a fine dark dust catching right in the butterfly area. So I apologize if I have been some what misleading as it is just the look that it has is black carbon.

TAZ

[mwrbunny]

I like to run high octane fuel once in a while to flush my wallet out.

[Vettster]

I just removed the fuel filter on my H2.
I figured that the sand and grit in the cheap Mexican gas would pass thru the fuel injectors and keep them cleaned out.

Induction system cleaning = nice revenue producer

[pdsq99f4]

Originally Posted by mwrbunny

I like to run high octane fuel once in a while to flush my wallet out.

Higher octane isn't any cleaner. It just has more octane to prevent engine knock. The Gen3 v8 engines found in trucks and H2s are known to have carbon buildup in the intake and throttle body. The induction cleaning cleans the carbon from the throttle body, intake ports, valves, and pistons. Usually they put a fuel injector cleaner in the tank too to clean out the injectors. There really is a difference. You should see the vehicle smoke when the flush is ran.

[f5fstop]

Only induction cleaning I can think of is Injector cleaning, using the J35800 injector cleaning machine (which the dealer would use). IT IS NOT necessary unless you have a driveability concern such as long or hard starts, chugging, a rough idle or intermittent misfires. Most of these conditions will light the service engine soon light and drop a code into the PCM memory. This code will signify a lean fuel system or be misfire codes.

Modern fuel injectors, like GM uses on the H2 and H3 (Multec 2 injectors), are clogged by contaminated fuel, not by carbon deposits as on older style injectors used in previous years and/or models.

Therefore, unless you have one of these driving concerns, do not waste your money at the dealer and pay them to clean injectors that are not dirty. If you want to do something to help keep the fuel system (including injectors) clean at every oil change add a can of Techron (Chevron?s fuel system cleaner), that can be purchased at every major auto parts store. (GM recommends GM?s own brand of fuel system and fuel injector cleaner; however, its major ingredient is Techron, and it costs a bit more.)

Another way to help the fuel system stay clean is to purchase fuel from a Top Tier Supplier only, but this can sometimes be difficult.

Personally, I add a can of Techron every 10K miles in all my vehicles, and have never had clogged or dirty injectors.