Hesitation between 2500 - 3500rpm
#1
Hesitation between 2500 - 3500rpm
My buddy has a 99 z28 m6 with 83k on it, only mods are slp loudmouth catback and a descreened MAF. We ran a code came up as the 02 sensors after the cat.
When driving the car it hesitates like crazy between 2 - 4k rpm .. could this be the 02 sensors?? Ive read its most likely the MAF but i really have no idea.. Please help!! Thanks guys
When driving the car it hesitates like crazy between 2 - 4k rpm .. could this be the 02 sensors?? Ive read its most likely the MAF but i really have no idea.. Please help!! Thanks guys
#5
Teching In
Join Date: May 2011
Location: Milwaukee, WI
Posts: 17
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Change the MAF, you can thank me later.
Seriously though, mine was doing all the same ****, throwing CAT and O2 codes and I replaced both cats and all 4 O2's until I read about the MAF problems, replaced my MAF and my car is back to being an animal.
Seriously though, mine was doing all the same ****, throwing CAT and O2 codes and I replaced both cats and all 4 O2's until I read about the MAF problems, replaced my MAF and my car is back to being an animal.
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#8
TECH Fanatic
iTrader: (12)
Old i know but hey Jmac if/when you switched out maf's did it resolve this problem?
Just noticed my car has a slight hesitation everytime RIGHT at 2500 rpm's, i know one of my cats is good bc it got replaced by warranty but not sure about the other but i dont hear any rattling, also i do have a descreened maf and have never cleaned it really.
Just noticed my car has a slight hesitation everytime RIGHT at 2500 rpm's, i know one of my cats is good bc it got replaced by warranty but not sure about the other but i dont hear any rattling, also i do have a descreened maf and have never cleaned it really.
#9
Did anyone ever figure this out same problem here. I also got lt's and my car has a hesitation around 2500rpm to maybe 2700rpm. Checked the plugs, wires, maf appears to be clean(no dirt stuck in it ) Im thinking its either the maf or 02 sensor. Can anyone who had this problem please help out
#10
Launching!
iTrader: (14)
Did anyone ever figure this out same problem here. I also got lt's and my car has a hesitation around 2500rpm to maybe 2700rpm. Checked the plugs, wires, maf appears to be clean(no dirt stuck in it ) Im thinking its either the maf or 02 sensor. Can anyone who had this problem please help out
#11
Do you have a K&N or any other oiled filter? I had the same hesitation in my SS. Cleaned the MAF and replaced that piece of junk filter and it's a different car. My dad is a GM tech, he said that he has seen that over and over again with K&N air filters.
#13
That's crazy, I would have never suspected the air filter.