vehicle is a 99 lightning, check sig for mods
After about 3 months of troubleshooting and diagnosis ive gotten a very detailed post here for you guys. i was also using the search function quite a bit the last few months as well. symptoms are as follows: truck hesitates and sputters/pings when rolling into WOT, and seems to pull timing and run weaker as it wars up. i believe this could be a few things here and this is why. i have a known lean condition after using an OBD2 diagnostic tool, got the infamous P0174 and P0171......cant remember if those are the exact ones since it was a bit ago, but it was the "bank 1 lean" and "bank 2 lean" codes. you guys get the idea.
so what do i do as far as repairs? well to start i have another car to drive so i put the lightning in the garage for the week and pulled the blower and iC to clean them both. did a compression test as well and changed plugs. also did an EGR delete to facilitate my troubleshooting and remve a vaccum leak from the equation. checked infamous "L" hose on the back too, no issues with that. compression was slightly off, but, nothing indicates a huge loss. drivers side bank was about 150 psi and passnegers was about 120-130 psi from what i recall and plugs looked nominal for the most part. anyways, replaced plugs no issues, put stockers back in since i have stock pulley. cleaned MAF and associated intake components. put everything back together......truck still runs rough. got another project so truck sat for about a week. get in to drive it......runs like a charm, so i drive it the next day to work and back. i didnt mess with it since it was running good. starts hesitating pinging/ sputtering again and running like a pig. wish i would have found it earlier, but theres a leak in the IC system somewhere, since its eating fluid. only takes about a day to eat it all. (my daily drive is about 25 miles round trip) havent started throwing money at it since thats never a good fisrt option. im guessing that with everything going on, a rebuild is in the near future but like i said, compression test checked out pretty decent.
im thinking if i get a new IC and change it (which sucks since i JUST had the thing off and probably could have done it then) get 2 new 02 sensors and a cat delete, it could fix my problems. emissions isnt an issue since im stationed at middle of nowhere New Mexico and they dont check them here anyways. any inputs are appreciated guys please share your experiences and maybe you more regular SVTP posters can help me solve this once and for all. thanks!
After about 3 months of troubleshooting and diagnosis ive gotten a very detailed post here for you guys. i was also using the search function quite a bit the last few months as well. symptoms are as follows: truck hesitates and sputters/pings when rolling into WOT, and seems to pull timing and run weaker as it wars up. i believe this could be a few things here and this is why. i have a known lean condition after using an OBD2 diagnostic tool, got the infamous P0174 and P0171......cant remember if those are the exact ones since it was a bit ago, but it was the "bank 1 lean" and "bank 2 lean" codes. you guys get the idea.
so what do i do as far as repairs? well to start i have another car to drive so i put the lightning in the garage for the week and pulled the blower and iC to clean them both. did a compression test as well and changed plugs. also did an EGR delete to facilitate my troubleshooting and remve a vaccum leak from the equation. checked infamous "L" hose on the back too, no issues with that. compression was slightly off, but, nothing indicates a huge loss. drivers side bank was about 150 psi and passnegers was about 120-130 psi from what i recall and plugs looked nominal for the most part. anyways, replaced plugs no issues, put stockers back in since i have stock pulley. cleaned MAF and associated intake components. put everything back together......truck still runs rough. got another project so truck sat for about a week. get in to drive it......runs like a charm, so i drive it the next day to work and back. i didnt mess with it since it was running good. starts hesitating pinging/ sputtering again and running like a pig. wish i would have found it earlier, but theres a leak in the IC system somewhere, since its eating fluid. only takes about a day to eat it all. (my daily drive is about 25 miles round trip) havent started throwing money at it since thats never a good fisrt option. im guessing that with everything going on, a rebuild is in the near future but like i said, compression test checked out pretty decent.
im thinking if i get a new IC and change it (which sucks since i JUST had the thing off and probably could have done it then) get 2 new 02 sensors and a cat delete, it could fix my problems. emissions isnt an issue since im stationed at middle of nowhere New Mexico and they dont check them here anyways. any inputs are appreciated guys please share your experiences and maybe you more regular SVTP posters can help me solve this once and for all. thanks!
