excessive rpm when put in gear
#11
CF Active Member
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...just an update...had a reliable and knowledgeable auto tech i trust say, based on my description of the this random behavior, he suspects a "lazy" 02 bank 2 sensor, especially when I told him I had random P0174 lean bank code appear and disappear w/o any pattern...soooo...since 02's are relatively cheap, gonna throw one in, provided I can GET the sucker off-have never done one & not a lot of "swing" room where it is located....not doing this right away, but I will be sure to come back and comment...I have a friend who I will be installing one on his '99 Dakota-will be good practice (gotta love friends who'll allow you to use their vehicle to "guinea pig" learn on....lol)...soooo... consider this thread resolved, sorta
Last edited by hogbiker; September 20th, 2021 at 8:05 AM.
#12
CF Active Member
Thread Starter
...just an update...had a reliable and knowledgeable auto tech i trust say, based on my description of the this random behavior, he suspects a "lazy" 02 bank 2 sensor, especially when I told him I had random P0174 lean bank code appear and disappear w/o any pattern...soooo...since 02's are relatively cheap, gonna throw one in, provided I can GET the sucker off-have never done one & not a lot of "swing" room where it is located....not doing this right away, but I will be sure to come back and comment...I have a friend who I will be installing one on his '99 Dakota-will be good practice (gotta love friends who'll allow you to use their vehicle to "guinea pig" learn on....lol)...soooo... consider this thread resolved, sorta
#13
CF Active Member
Thread Starter
another update...well, tried to replace 02 sensors...as I couldnt get "swinging room" for a wrench, I disconnected the front 4WD driveshaft and lower'd the Y pipe (to my astonishment, the header stud nuts didnt give me a hard fight) then proceeded to work on removing the B1S1 02.....used hi heat 1st, more than 1 heat cycle and that darn 02 was SOO fused on, I actually RIPPED the weld bung right off the Y pipe!...now, I HAVE to get an exhaust AND 02s....grrrrr...I pity folks that have to change out 02s in the salt infested North
#14
CF Active Member
Thread Starter
another update...new Y pipe assy and new B1 and B2 02 sensors on the Y pipes, but not the post cat 02 ....problem STILL occurs, again randomly, and now where I before had an occasional P0174 lean bank code, it now sets w/regularity.. I verified I have absolutely ZERO exhaust leaks in my repair..I'd think if i had a vacuum leak, a P0171 would appear as well, but it doesnt set...what am I chasing/missing?
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ericnottelin
Silverado, Sierra & Fullsize Pick-ups
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June 14th, 2015 4:23 PM