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2001 Chevy Silverado 1500 4.3L V6 was running fine and then the O2 Sensors went out. I have since replaced them but it with start then idle really rough then die if you let off the gas

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L Pfaff

Cars & Trucks Master 11,573 Answers
Posted on Aug 11, 2016

L Pfaff

Cars & Trucks Master

Joined: Jan 05, 2011

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Robert, have vehicle scanned for diagnostic codes. Check for vacuum leaks and if you have not done recently give vehicle a complete tune up cap,rottor,wires,plugs,filter's,etc, including injector/throttle body cleaning. Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."

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Robert Hayes Aug 11, 2016

PO300 OBD-II code comes up with a random or multiple misfire
L Pfaff Aug 11, 2016

Robert, possible causes-- Faulty spark plugs, faulty coil, faulty fuel injector, intake/vacuum air leak, fuel injectors harness is open or shorted, fuel Injectors circuit poor electrical connection, ignition coils harness is open or shorted, ignition coils circuit poor electrical connection, insufficient cylinders compression, incorrect fuel pressure,
worn distributor/gear were also a problem with GM's
Good Luck with your repair. I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info.

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When i floor my 01 navigator it wont go it makes a popping sound in the throttle body

sounds like the cats are plugged up....remove the o2 sensors and see if it runs better. Mine would idle, but would pop and stumble when the gas was hit. Ran well for a long time but would stumble whwn floored, slowly got so bad couldnt drive it but it idled fine. Pulled the o2 sensors and started it up and all kinds of debris, junk, blew out. Replaced cats and o2 sensors and runs great. cost $2000.00 in parts.If you find that this is your problem, then check to see if the cats came apart and blew chunks into the muffler,,,,can cause a restriction and cook the new cats. Took me a lot of time to get this truck running right, but it sounds like youre dealing with the same issues..I went through the coil packs and chased engine codes for a week. Pull the o2 sensors and see what blows out; and if engine runs better.....hope this helps (spend some time pricing o2 sensors and y pipe with cars...you can save some $. good luck!

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Mar 06, 2014 • 2001 Lincoln Navigator

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My 2006 Chevy Silverado 1500 5.3 L engine surges +/- 200 rpm between 30-59 mph in final drive gear...in lower gears runs fine. No check engine light or computer code generated until recently which showed...

a bank 1 or a bank 2 generally means an 02 sensors bad. or you may simply have a faulty gas cap. i would try the gas cap 1st,make sure it's tight, the engine running for a few minutes,then cut engine off. then open gas cap,do you hear pressure [air] releasing from the fuel tank? ok if not that,then if bank 2 is really bad,your check engine light would be on. but if the idle control sensor is bad,no light would be on at all. and it[engine] would idle up and down.or would'nt idle at all,or would idle up and down,just like what you've described. good luck and thank you for choosing fixya.com and please let me know if i'ved assisted you!

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Feb 20, 2011 • 2006 Chevrolet Silverado 1500 2WD

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01 silverado no power, idles fine , new cats, new o2 sensors, has 55 psi fuel pressure. drive for 10min wont go over 10 mph. all o2s show low voltage po 131 po151, shut off , start up drive again does the...

Popping from intake is usually an indication of timing issue. Worst case issue, flat lobe on cam shaft but this is a constant. Check the timing first.

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Sep 18, 2009 • 2000 Pontiac Sunfire

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Aug 26, 2009 • 2003 Chevrolet Silverado 1500

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1995 Chevy K1500 4.3L V6. Engine has inconsistant idle

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Apr 13, 2009 • 1997 Chevrolet K1500

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2000 chevy runs rough changed fuel pump fuel filter o2 sensors o2 sensors still show bank 1 #1 lean bank 2 #1 lean will run 200 miles i will shut it off do what i have to do start it up and go 3 to 4 miles...

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2001 Chevy Silverado 1500 4.3L V6 was running fine and then the O2 Sensors went out. I have since replaced them but it with start then idle really rough then die if you let off the gas

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L Pfaff

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When i floor my 01 navigator it wont go it makes a popping sound in the throttle body

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Trustworthy Expert Solutions

2001 Chevy Silverado 1500 4.3L V6 was running fine and then the O2 Sensors went out. I have since replaced them but it with start then idle really rough then die if you let off the gas

1 Answer

L Pfaff

Add Your Answer

Attachments: Added items

Related Questions:

When i floor my 01 navigator it wont go it makes a popping sound in the throttle body

My 2006 Chevy Silverado 1500 5.3 L engine surges +/- 200 rpm between 30-59 mph in final drive gear...in lower gears runs fine. No check engine light or computer code generated until recently which showed...

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When i floor my 01 navigator it wont go it makes a popping sound in the throttle body

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