ghammond
05-18-2005, 17:50
Dr. Lee,
I have a '97 K1500 6.5 w/ 168k miles that is stock except a K&N air filter. Recently I have been pulling codes 101, 236, and 401. I do have black exhaust smoke under acceleration and at start-up there is a puff of black smoke sometimes heavy and sometimes light. The truck is initially sluggish on acceleration but will get peppy after a few seconds into acceleration. I replaced the EGR valve about 20k miles ago. I have recently replaced the MAP sensor and Turbo Boost sensor A. I have removed the EGR, cleaned it , and re-installed it and code 401 did not come up for a few weeks. Currently all three codes come up within 20 miles of erasing them. I have inspected and cleaned The MAF sensor with Electra Clean and the wire filaments look intact. Any suggestion on what my problem might be?
I apologize for the length. I wanted to give you as much info up front as I could.
Thank you,
Greg Hammond
I have a '97 K1500 6.5 w/ 168k miles that is stock except a K&N air filter. Recently I have been pulling codes 101, 236, and 401. I do have black exhaust smoke under acceleration and at start-up there is a puff of black smoke sometimes heavy and sometimes light. The truck is initially sluggish on acceleration but will get peppy after a few seconds into acceleration. I replaced the EGR valve about 20k miles ago. I have recently replaced the MAP sensor and Turbo Boost sensor A. I have removed the EGR, cleaned it , and re-installed it and code 401 did not come up for a few weeks. Currently all three codes come up within 20 miles of erasing them. I have inspected and cleaned The MAF sensor with Electra Clean and the wire filaments look intact. Any suggestion on what my problem might be?
I apologize for the length. I wanted to give you as much info up front as I could.
Thank you,
Greg Hammond