sgrillak
LVC Member
hello everybody. i've been lurking around here for a little over 2 years and gotten better help from thia forum than from the local dealers. for that, thank you. with things i've learned here i seem like a ls guru where i live.
now my problem: a while back i got a camshaft position sensor code. it didnt affect the car much, just a slight shake every now & again (i now know those were misfires). i let it go for a month but by then i started getting multiple misfire codes but the car still ran pretty good. one day on my way to work, it stalled but started right back up. ran fine for a couple of days then started running really rough when it reached normal operating temp. it did this for about 2 days when i noticed the pattern. i pulled the codes and got misfires on 5 cylinders as well as bad cats. i drove it to work (only transportation) and on the way home got the dreaded aice chip fault code, the message center told me that the pcm couldn't find TDC. car died out and wouldn't restart. i bought a vcm2. i got some codes related to pcm communications so i pulled the pcm relay, replaced it, and cleaned ALL sockets in ALL fuse boxes as well as all connectors (found a lot of corrosion). i replaced the cmp, ckp, all cops & plugs. car still wouldn't start. i could now communicate with the pcm but the car told me that a theft was detected. i figured the pcm was damaged from the misfires so i replaced it. i programmed everything now the car cranks but won't start. i know the cats are damaged but i pulled the downstream o2 sensors and i get pressure from the holes. i switched to using Forscan (a lot easier to use) for diags and koeo tests now give me b1681 and reading pid data tells me that the cmp is low (not sure what it's supposed to be). after some research i'm thinking the pats transceiver is bad. none of the tests i have run indicate anything wrong with the timing chains but i imagine it could be possible. i will be replacing the pats transceiver this weekend. does anyone have any thoughts/suggestions?
now my problem: a while back i got a camshaft position sensor code. it didnt affect the car much, just a slight shake every now & again (i now know those were misfires). i let it go for a month but by then i started getting multiple misfire codes but the car still ran pretty good. one day on my way to work, it stalled but started right back up. ran fine for a couple of days then started running really rough when it reached normal operating temp. it did this for about 2 days when i noticed the pattern. i pulled the codes and got misfires on 5 cylinders as well as bad cats. i drove it to work (only transportation) and on the way home got the dreaded aice chip fault code, the message center told me that the pcm couldn't find TDC. car died out and wouldn't restart. i bought a vcm2. i got some codes related to pcm communications so i pulled the pcm relay, replaced it, and cleaned ALL sockets in ALL fuse boxes as well as all connectors (found a lot of corrosion). i replaced the cmp, ckp, all cops & plugs. car still wouldn't start. i could now communicate with the pcm but the car told me that a theft was detected. i figured the pcm was damaged from the misfires so i replaced it. i programmed everything now the car cranks but won't start. i know the cats are damaged but i pulled the downstream o2 sensors and i get pressure from the holes. i switched to using Forscan (a lot easier to use) for diags and koeo tests now give me b1681 and reading pid data tells me that the cmp is low (not sure what it's supposed to be). after some research i'm thinking the pats transceiver is bad. none of the tests i have run indicate anything wrong with the timing chains but i imagine it could be possible. i will be replacing the pats transceiver this weekend. does anyone have any thoughts/suggestions?
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