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I have a misfire on cylider 4 with a rough idle. However,
I have a misfire on cylider 4 with a rough idle. However, shortly after the cruise control randomly stopped working but some times does work and the back speakers do the same. … read more
Gary
Gary
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Vocational, Technical or Trade Scho
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My 02 trailblazer is misfiring. After getting a P0303 code
My 02 trailblazer is misfiring. After getting a P0303 code on my obd scanner, I changed the spark plug. I was still getting the same misfire and code so I replaced the ignition coil pack. The truck is… read more
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2004 4.2L DTC P0300. Just replaced fuel filter and cleaned
2004 4.2L DTC P0300. Just replaced fuel filter and cleaned throttle body … read more
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I'm ***** ***** and I have a 2000 buick regal that gave me a
I'm ***** ***** and I have a 2000 buick regal that gave me a code of p0300. I changed the spark plugs and wires and then noticed that the coil pack for cylinders 1 and 4 weren't firing. I purchased a … read more
Gary
Gary
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Vocational, Technical or Trade Scho
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I had a p302 code on 2003 Trailblazer. The truck was running
Customer: I had a p302 code on 2003 Trailblazer. The truck was running rough. My wife picked up a new coil pack at auto parts store and brought it home. I replaced the coil pack on cylinder 3 but my w… read more
JOHN aka Eauto
JOHN aka Eauto
self employed
High School or GED
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Chevrolet Trailblazer: Good Afternoon, I have a 2005 Chevy
Good Afternoon, I have a 2005 Chevy Trailblazer with the "rough idle" problem. It is only felt at idle and occurs in park, neutral, with air on or off. I have engine code p0305 and p0128. I have read … read more
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Chevrolet Trailblazer: Hello, I have a 2002 trailblazer and
Hello, I have a 2002 trailblazer and it started skipping and getting a service engine light and skipping so I checked it and got a cylinder 2 misfire code. So I changed all the spark plugs and the coi… read more
GM Tech (Cam)
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Vocational, Technical or Trade Scho
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i have a 2004 trailblazer that started hesitating under acceleration
i have a 2004 trailblazer that started hesitating under acceleration and running a little rough at idle and gave a P0304 code. Changed all plugs and #4 coil pack. Still running the same and check engi… read more
Gary
Gary
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Vocational, Technical or Trade Scho
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Have a 2006 Chevy Trailblazer 4.2L. Started getting a lean mixture Bank #1 (P0171) about
Have a 2006 Chevy Trailblazer 4.2L. Started getting a lean mixture Bank #1 (P0171) about six months ago and was running a little rought at idle. Put in new spark plugs (65,000 miles) and cleaned thott… read more
Neal
Neal
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DROVE CAR HOME RAN BAD ,HADE 6 CODES P0101,P0171..P0174
AMEDDE FINNALY GOT CAR SMOGGED ,DROVE CAR HOME RAN BAD ,HADE 6 CODES P0101,P0171,P0172, P0174, P0175, P0300.CLEARED CODES .DROVE TO WORK 5 DAYS LATER 50 DEGREES TEMP ,RAN PERFECT NO CODES . DROVE AFTE… read more
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chevy tracker: my 2003..liter..rough idle..changed coil packs no help.
my 2003 2 liter chevy tracker has rough idle, service engine soon light is on all the time. had it checked, #4 cylinder misfire. changed coil packs no help. changed injector and got no help. rough idl… read more
Eric
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trailblazer: idling..firing..new plugs and up stream o2 sensor..hose
hi i have a 02 trailblazer running rough while idling and driviving until you get to 45 - 50 mph . put in new ign switch , cam position sensor , a had chevy mechanic scan said #4 mis firing bought new… read more
Amedee
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2000 Chevy Malibu LS: idles rough..o2 sensors..rev..pumping it
My 2000 Chevy Malibu LS idles rough, more so while in drive stopped at a stoplight or something. Jus had the o2 sensors changed, which is what the diagnostic test said, but still doin it. If in park a… read more
cartech
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master tech
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2005 CHEVY TRAILBLAZER: running rough even in park and at idle...p0302
I have a 2005 CHEVY TRAILBLAZER with 86,000. It is running rough even in park and at idle. I am getting A P0300 & P0302 code. What should I check first?… read more
GM Tech (Cam)
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2005 trailblazer: blew..fuel rail..back together..misfiring and smelt
my 2005 trailblazer just blew an engine at 60000miles. I took an engine out of a 04 trailblazer, switched the fuel rail and got it all back together. when i started it it was misfiring and smelt like … read more
Tim
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I have a 2003 chevy trailblazer EXT about a week ago i started
I have a 2003 chevy trailblazer EXT about a week ago i started having a vibration from the engine while idling at a stop light. I had the O2 sensor replaced as it gave a code twice when the service en… read more
Dan
Dan
Auto Technician
Associate Degree
random cylinder misfire..Cam shaft..crank sensors replaced
random cylinder misfire but can't find the problem. Plugs, distr are fine. Cam shaft has been readjusted, crank sensors replaced. Check engine light goes off when in the city under speeds of 55 mph. D… read more
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Chevy: changed plugs..driver side..the passenger side..runs fine
i have a 04 chevy with 5.3 and it started idling rough and i changed plugs on it the driver side is fine and the passenger side is all black and it runs fine after 1500 rpm but the code read a p0300 w… read more
PARTSPRO4779
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Meet the Experts:

GM Tech (Cam)

GM Tech (Cam)

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Ron Z.

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