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I have a 2003 silverado 2500 hd and i have a p0300 random
i have a 2003 silverado 2500 hd and i have a p0300 random misfire code. Before i thought it was related to a code i was getting for o2 sensor. i replaced the o2 sensor but still have the p0300 code. o… read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,642 satisfied customers
It is misfiring and my mechanic keep putting new part which
It is misfiring and my mechanic keep putting new part which r not broken and still never fixed the problem … read more
Jared D
Jared D
Shop Supervisor
Bachelor's
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I have a 2009 Chevy Silverado 1500 Z71 the 5.3 liter engine!
I have a 2009 Chevy Silverado 1500 Z71 the 5.3 liter engine! I just recently had the lifters replaced along with new spark plugs and new oil pump. Now I'm getting a cylinder 8 misfire and service trac… read more
Todd Audette
Todd Audette
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Vocational, Technical or Trade School
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Number 1 misfire. New plugs, wires, maf, TPS and new
Number 1 misfire. New plugs, wires, maf, TPS and new injector on number 1. Still shows code p0301. Runs rough got good compression. This all started with the TPS so I replaced it and now misfire numbe… read more
roy
roy
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Chevy 09 Equinox is miss firing, I replaced to plugs, fixed
Chevy 09 Equinox is miss firing, I replaced to plugs, fixed the problem for about a week then it came back, next replacement of the plug wires fix the problem for about 2 months then it was back again… read more
Dan
Dan
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Vocational, Technical or Trade Scho
25 satisfied customers
I have a 07 chevy Silverado 6.0 L vortex max. My number 6
I have a 07 chevy Silverado 6.0 L vortex max. My number 6 cyl is misfireing. I have swapped coil packs, spark plugs and spark pulg wire and number 6 still misfires. … read more
Dan
Dan
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Vocational, Technical or Trade Scho
25 satisfied customers
Cylinder 6 is misfiring when van is idiling, 148000 miles
I took it to a mechanic, he replaced the spark plug and wires, the fuel injector, and the coil on that cylinder … read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,642 satisfied customers
I have a 2008 chevy silverado 2500hd its givibg me a readinh
I have a 2008 chevy silverado 2500hd its givibg me a readinh of p0303 (cylinder 3) misfire. I changed the spark plug, coil, and the fuel injector. Its still misfiring. Can you help me solve this puzzl… read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,642 satisfied customers
Having misfires on a chevy 2500 6.0, i think 160000, it
i think 160000, it misfireing on bank 1, started mostyl 1 and 3 but the more i do is all across … read more
Chad Farhat
Chad Farhat
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5,732 satisfied customers
Misfire cylinder 6. O change. Spark plug ,cool, injector
Misfire cylinder 6. O change. Spark plug ,cool, injector and.is giving me that code again … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
I am having a misfire on cylinder #4 I changed the coil pack
I am having a misfire on cylinder #4 I changed the coil pack and the plug and wire and it didn't fix it … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
Misfire on cylinders 5&6 at idle, goes away when rpm is
misfire on cylinders 5&6 at idle, goes away when rpm is increased. checked coils, spark plugs, wires, intake manifold cleaned tb, etc. … read more
Dan
Dan
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Associate Degree
2,172 satisfied customers
I have an 01 2500HD with the 6.0 its misfiring on 1 and 5. I
I have an 01 2500HD with the 6.0 its misfiring on 1 and 5. I have changed the plugs wires and coils with no change. Could the problem be in the harness or computer … read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,642 satisfied customers
Chevrolet Silverado 1500: 08 chevy silverado 4.8 1500 keep
08 chevy silverado 4.8 1500 keep getting po306 code did plugs wires coil on #6 put timing light on #6 to make sure getting juice lights light up good… read more
Eric
Eric
Auto Technician
589 satisfied customers
Chevrolet Tahoe 4x2: 2005 TAHOE 185000 MILES 5.3 HAS PO300.
2005 TAHOE 185000 MILES 5.3 HAS PO300. MISSING AT IDLE ONLY. #6 MISFIRE ONLY GOES AWAY ONCE YOU REACH 1500 RPM. HAS # XXXXX HAS GOOD COMPRESSION CHECKED ALL IGNITION OR VACUMN LEAKS… read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,642 satisfied customers
My 2007 Silverado shows a cylinder 3 misfire code. I just
My 2007 Silverado shows a cylinder 3 misfire code. I just had a new fuel pump installed and this same error code was addressed and supposedly fixed in Dec of 2009 by Chevy techs? What do you see as th… read more
David H
David H
Vocational, Technical or Trade Scho
2,413 satisfied customers
2007 chevy: cylinder #3 misfire error..spark plug..#3 ignition coil
I have a 2007 chevy silverado that continues to get a cylinder #3 misfire error. I have replaced #3 spark plug and plug wire. Also just replaced the #3 ignition coil and thought that fixed it but it h… read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
25 satisfied customers
1999 Chevy: intake manifold gaskets..1500 truck..trouble code
I have just put new intake manifold gaskets on my 1999 Chevy Silverado, 1500 truck, 5.3 engine. After installing gasket, a new trouble code of PO307 registers. I would like to know what that code is. … read more
Vladgmru
Vladgmru
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Vocational, Technical or Trade Scho
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