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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 > OEM Issues

OEM Issues Original Equipment Repairs and/or Problems

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  #1  
Old 08-03-2018, 02:56 AM
GiedriusZ GiedriusZ is offline
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2003 Chevy TrailBlazer LTZ
Black 4.2L I6 4X4
Join Date: Mar 2018
Location: Lithuania
Posts: 14
engine problem

Hello There is such a problem. All is well done while driving softly and calmly. But you need to accelerate sharply. The machine starts to accelerate and starts to stumble at a certain moment. and decreases thrust. such an indication that fuel is not enough or not. The light on the panel lights up Reduced Engine Power.
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  #2  
Old 08-03-2018, 08:48 AM
princej99 princej99 is offline
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2008 GMC Envoy SLE
Bordeaux Red Metallic 4.2L I6 4X4
Join Date: Jan 2018
Location: ont
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Quote:
Originally Posted by GiedriusZ View Post
Hello There is such a problem. All is well done while driving softly and calmly. But you need to accelerate sharply. The machine starts to accelerate and starts to stumble at a certain moment. and decreases thrust. such an indication that fuel is not enough or not. The light on the panel lights up Reduced Engine Power.
hi, and welcome, from what i can understand of your post, you have reduced engine power light.

any check engine codes?

when was the last time engine had a tuneup? plugs, throttle body cleaned?
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  #3  
Old 08-04-2018, 02:22 AM
GiedriusZ GiedriusZ is offline
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2003 Chevy TrailBlazer LTZ
Black 4.2L I6 4X4
Join Date: Mar 2018
Location: Lithuania
Posts: 14
Sparks plugs are new. thortle body not cleaned. Chek engine codes not read yet. But I try do it today. now I am 1050M from home.

Quote:
Originally Posted by princej99 View Post
hi, and welcome, from what i can understand of your post, you have reduced engine power light.

any check engine codes?

when was the last time engine had a tuneup? plugs, throttle body cleaned?
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  #4  
Old 05-22-2019, 05:02 PM
GiedriusZ GiedriusZ is offline
Junior Member
 
2003 Chevy TrailBlazer LTZ
Black 4.2L I6 4X4
Join Date: Mar 2018
Location: Lithuania
Posts: 14
Quote:
Originally Posted by princej99 View Post
hi, and welcome, from what i can understand of your post, you have reduced engine power light.

any check engine codes?

when was the last time engine had a tuneup? plugs, throttle body cleaned?
https://www.youtube.com/watch?v=cuhIZRafeS4 the problem is still not resolved. throttle body cleaned. when I scan the engine codes do not show any errors that are very strange.
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  #5  
Old 05-23-2019, 12:02 AM
falcon8667 falcon8667 is offline
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2005 GMC TrailBlazer LS
Bordeaux Red Metallic 4.2L I6 4X4
Join Date: Jul 2018
Location: usa
Posts: 104
Possible causes: low fuel pressure , intermittent misfire, check for weak coil pack or clogged cat converter. It happened to me engine check like came up with reduced power during hard acceleration. Turns out to be failing coil pack. Replaced it. Problem solved.

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