Latest Bulletins
 

Various Driveability Symptoms Due to Clogged Fuel Injectors, MIL/SES DTCs P0171, P0172, P0174, P0300, P1174, P1175 (Clean Fuel Injectors and/or Perform Injector Test With AFIT - CH-47976) #03-06-04-030C - (03/15/2007)

ALL GM Vehicles.
Condition
Some customers may comment on any of the following various driveability symptoms:

? Extended Crank Time

? Hard to Start

? MIL/SES Illuminated with DTCs:

? Hesitation

? Lack of Power

? Surge or Chuggle

? Rough Idle

? Light or Intermittent Misfire

Cause
Due to various factors, the fuel injectors may become restricted. Extensive testing has demonstrated that fuel related issues are the cause of clogged injectors. At this point, no specific fuel, fuel constituent, or engine condition has been identified as causing the restriction. The restriction causes the engine to operate at a lean air fuel ratio. This may either trigger the MIL to illuminate or the engine to develop various driveability symptoms.

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Timely post! Thanks. :beerchug: My H3's in the shop with the cursed rear end problem yet again :crying: and I just recently had a drop in mileage :mad: and it idles rougher. I'm not having any codes though. I'll be calling first thing Monday morning.

Chuggle, is that a technical term? I gotta remember that one!

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Good to know. I only use Chevron gas in all 3 of our vehicles. So far so good.

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is that measured in secinds or miliseconds?? i always get that mixed up.

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What rear end problem? Are you having problems with the rear diff?

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Well, they think so. It's got the same symptoms as when the coil burned up in the elocker. It's still there, I'll post their findings. The passenger side inside door handle also cracked to smithereens in the bitter cold this winter. Looks like someone took a razor knife to it!

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Get used to it. I'm on my 3rd or 4th passenger door handle already. I lost count

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Are the repairing or replacing? With that many trips back, I would yell for a complete new assembly. Almost sounds like the tech is not doing something correctly.

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Well, here's my dream world: The rear end does ok and grenades this fall when they can lemon it out and I'll get the Alpha! (just kidding, but replacement's what I have in mind.)

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Just Curious, Is there a recomended fuel injector cleaner? Also what are thoughts of using Seafoam brand?

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Doesn't everyone complain about that?:giggling:

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I run Techron through the tank about every 6K miles. You can purchase it from GM as GM fuel injector cleaner, but the Techron from the auto parts store is the primary ingredient in the GM fuel injector cleaner.

Just a note, the fuel injector bulletin is for ALL GM cars and trucks. It is not a large problem in this day-and-age, but one that can be cured.

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Thanks f5f that's good to know