Bad Cat?
#1
Bad Cat?
Thanks in advance I've been having problems with my 2001 Blazer I can't go more than about 30 mph and it seems low on power and starts to buck. I did have a mass air code which I cleared and cleaned the Mass air sensor. I also checked and I can't rev it up past 2500 rpm in neutral I was thinking that it maybe a plugged cat, does that sound right? also which one is it that usually causes problems the smaller first one or the second one.
#2
update
Ok so I took the O2 sensors out to see how much back pressure there was ran better, so replaced front cat and runs 10x better now not sure if I should replace the main cat or not but seems to be running ok so maybe not.
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