5.3L Silverado low RPM hesitation?
05-24-2010, 06:21 PM
#1
5.3L Silverado low RPM hesitation? 2006 Silverado 5.3 auto 2WD
Give me some direction boys, not sure where the issue is, just started happening one day at a stop light. Here's what happens.
Below 2000 RPMS, engine will hesitate like it's miss-firing. If I'm stopped at a stoplight you can feel the engine miss and the tach bounces around 100-150 RPMS. Soon as you get over 2000 RPMS all hesitation is gone (from what i can tell)
What am i missing? Thanks for the help
Done -
1. Cleaned TB with deep creep
2. Ran a can of SEA foam in tank
3. Ran 91 octane for a tank and 87
4. Changed plugs
5. Air Filter/ Oil done regularly
Not done -
1. Plug wires
2. O2 sensors
3 ???
Give me some direction boys, not sure where the issue is, just started happening one day at a stop light. Here's what happens.
Below 2000 RPMS, engine will hesitate like it's miss-firing. If I'm stopped at a stoplight you can feel the engine miss and the tach bounces around 100-150 RPMS. Soon as you get over 2000 RPMS all hesitation is gone (from what i can tell)
What am i missing? Thanks for the help
Done -
1. Cleaned TB with deep creep
2. Ran a can of SEA foam in tank
3. Ran 91 octane for a tank and 87
4. Changed plugs
5. Air Filter/ Oil done regularly
Not done -
1. Plug wires
2. O2 sensors
3 ???
11-09-2010, 09:14 AM
#4
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Clean your MAF also. O2's can cause a miss, or sometimes can cause it to run like plain ****. If you know anyone with a handheld tuner or scanner you could check the mV's running.
When all else fails read your plugs...let it miss for a while without clearing it out then start pulling them. You will be able tell where the problem is coming from, then you can go from there...
When all else fails read your plugs...let it miss for a while without clearing it out then start pulling them. You will be able tell where the problem is coming from, then you can go from there...
11-09-2010, 07:56 PM
#5
No codes
MAF's been cleaned, i'll check plugs/wires again before assuming it's o2 sensors.
Thanks
Clean your MAF also. O2's can cause a miss, or sometimes can cause it to run like plain ****. If you know anyone with a handheld tuner or scanner you could check the mV's running.
When all else fails read your plugs...let it miss for a while without clearing it out then start pulling them. You will be able tell where the problem is coming from, then you can go from there...
When all else fails read your plugs...let it miss for a while without clearing it out then start pulling them. You will be able tell where the problem is coming from, then you can go from there...
Thanks
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02-07-2011, 09:04 AM
#9
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Fuel filter? Restricts flow causing it to go lean, but should set a code. My only experience with something very similar was on an OBDI car, not nearly that fancy of a computer system.
My 2000 5.3 Silverado has a O2 going out. It sets a code about every 6 months but I never notice it running different. MPG still the same and no driveability problems. I just reset the code and keep going. O2s for those trucks are expensive.
My 2000 5.3 Silverado has a O2 going out. It sets a code about every 6 months but I never notice it running different. MPG still the same and no driveability problems. I just reset the code and keep going. O2s for those trucks are expensive.
02-25-2011, 01:53 AM
#10
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I wouldnt believe it is the fuel filter since the miss does not seem like its from starvation. It seems more along the lines of one constant dead hole until about 2k rpms then it runs great
02-25-2011, 07:16 AM
#11
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If I was a betting man I'd say it's prob your O2 throwing it off in low rpm range. If you know someone with a handheld you can watch the voltage on the O2s and make sure that they're within their tolerant range. I had an O2 go on my 04 silverado 5.3L and it didn't throw a code for some odd reason, it was kinda sluggish didn't really miss but you could def tell something was wrong, bought my handheld watched the voltage output and found my one O2 before the cat was going haywire. GL
--ROFL just noticed this post was from almost a year ago, boy I hope you got it figured out by now. I been punk'd
--ROFL just noticed this post was from almost a year ago, boy I hope you got it figured out by now. I been punk'd
Last edited by arctic00ws6; 02-25-2011 at 07:30 AM.
02-28-2011, 03:45 AM
#12
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If I was a betting man I'd say it's prob your O2 throwing it off in low rpm range. If you know someone with a handheld you can watch the voltage on the O2s and make sure that they're within their tolerant range. I had an O2 go on my 04 silverado 5.3L and it didn't throw a code for some odd reason, it was kinda sluggish didn't really miss but you could def tell something was wrong, bought my handheld watched the voltage output and found my one O2 before the cat was going haywire. GL
--ROFL just noticed this post was from almost a year ago, boy I hope you got it figured out by now. I been punk'd
--ROFL just noticed this post was from almost a year ago, boy I hope you got it figured out by now. I been punk'd
