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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 Vortec 4.2L I-6 Engine and Drivetrain > Air Induction

Air Induction Performance Air Intake/Air Induction Modifications

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  #1  
Old 09-16-2005, 12:14 AM
ScarabEpic22 ScarabEpic22 is offline
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Fuel Injector cleaning?

The local transmission place is offering $30 off fuel injector cleaning. I call to see what they do, and they hook up a machine with chemicals that remove the gunk and carbon deposites. Does anyone have any suggestions? Should I do it, and if so, will I get anything out of doing it? Its kinda pricey, $100 per car, and if I do it to my TB, the RX gets it as well. Has anyone had any problems or anything like that? They are both at ~51k miles, although my RX is 3 yrs older.

What do ya think???

Thanks
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  #2  
Old 09-16-2005, 09:43 AM
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tblazed tblazed is offline
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Services like this are very profitable for those shops. Is it running rough or poorly? SES light coming on? Any reason other than they just recommend doing it? Considering the cost of replacing injectors I would not run anything through them that is not GM approved, and only if there is a problem. If you consistently use a "Top Tier" rated gasoline brand (see http://www.toptiergas.com ) like Chevron, Shell, etc., with enough cleaner and detergent additives already in it from the pump, you will likely not have injector clogging problems. Be sure to check out the section "Deposit Control". I would use that $100 to buy more gas to go down the road. My 3.
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Old 09-16-2005, 11:16 AM
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Tblazed's advice is right on the money. I wouldn't take them up on their offer unless there's a good reason such as rough running, etc. As a preventive maintenance procedure it's going to benefit mostly the shop (more $$ in their pocket). An occasional bottle of injector cleaner will do the trick. I've heard only good things about Chevron Techron, so that's what I use.

And it's nice to finally see someone else who has heard of and believes in Top Tier gas! Seems like everyone I mention this to says something along the lines of "Huh? Gas is gas!" I've been running only Top Tier since I first heard about it.
http://www.gm.com/automotive/fueleconomy/detergent.html
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Old 09-16-2005, 01:34 PM
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Quote:
Originally Posted by tblazed
Services like this are very profitable for those shops. Is it running rough or poorly? SES light coming on? Any reason other than they just recommend doing it? Considering the cost of replacing injectors I would not run anything through them that is not GM approved, and only if there is a problem. If you consistently use a "Top Tier" rated gasoline brand (see http://www.toptiergas.com ) like Chevron, Shell, etc., with enough cleaner and detergent additives already in it from the pump, you will likely not have injector clogging problems. Be sure to check out the section "Deposit Control". I would use that $100 to buy more gas to go down the road. My 3.
Which will buy a little over a tank of gas these days. I agree with tblazed though. I use a bottle of injector cleaner every 15k miles or so. Gas stations are known to get crap in their gas. I much rather spend a few $$ on injector cleaner than a new injector down the road.
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Old 09-16-2005, 07:02 PM
ScarabEpic22 ScarabEpic22 is offline
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Thanks guys.
No, Im not having problems, just looking into it for mainly my RX because its getting hrrible mileage. Still runs smooth and great, so decieded to buy some Techron today and will put it in tomorrow when I fill up. Also, Im going to clean the TB and the MAF on it and check the tires. Hopefully this will help!
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Old 09-16-2005, 08:38 PM
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Quote:
Originally Posted by ScarabEpic22
Thanks guys.
No, Im not having problems, just looking into it for mainly my RX because its getting hrrible mileage. Still runs smooth and great, so decieded to buy some Techron today and will put it in tomorrow when I fill up. Also, Im going to clean the TB and the MAF on it and check the tires. Hopefully this will help!
Erik, I didn't know that the 6 cyl. had a MAF, I thought only the 5.3 had a maf. Can you confirm this?
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Old 09-16-2005, 09:47 PM
ScarabEpic22 ScarabEpic22 is offline
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Sorry, in that sentence I am referring to my 99 RX300 3.0 V6. It has a MAF, while the 02-05 TB/ect. with the 4.2L I6 all have IAT. I just finished cleaning mine about 2 hours ago, and it is not a MAF! Sorry for the confusion.

EDIT: The 5.3L V8s all have MAFs, forgot to say that earlier!
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Old 09-21-2005, 08:13 PM
autotech autotech is offline
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as a part of our (my dealership) scheduled maintanence, we flush the fuel injectors a minimum of every 30k. sooner if there are running problems. we run a mixture of top-engine cleaner and gasoline through the fuel rail at high pressure for about 30 minutes. this cleans all the carbon and varnish buildup from the injectors. as for aftermarket fuel system treatments, be very careful. there are many out there that can actually damage the seals in the injectors and possibly void the warranty on your fuel system. GM sells a fuel system cleaner that goes into the tank that is comparably priced to the other cleaners. top tier gas is a good way to go, but even that is not perfect. there are always going to be contaminants in any fuel that you buy.
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Old 09-21-2005, 09:22 PM
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02redhawk 02redhawk is offline
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A good product to use for cleaning out your fuel system is Fuel Power.

All the reading and more regarding it can be found from consumer reviews over at BobIsTheOilGuy.
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Old 09-21-2005, 09:56 PM
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I'm going w. the $10 motomaster fuel injector cleaner from canadian tire
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