Hey, I had a question..(Well a couple). Here are my issues, I am doing a GA16DE to JDM SR20 swap, I got the engine in and every thing but the problem is my timing and idling. The symptoms are backfiring and jumping idle when trying to time it making it impossible. I have purchased a new MAF and done the grounding...no help, new Nismo adjustable fpr...no help, swapped out the fuel rail and injectors...no help, adjusted the distributor, new IACV..no help, adjusting screw...no help, swapped two sets of spark plugs gapped for .035 and .044...guess what......no help, tried to time it but the idle continued to jump from 1000rpm to approx 1700rpm, the timing light catches the timing mark and then it jumps........so I was reading on the forum about the timing chain jumping. I removed the VC according to the Haynes manual and turned my crank to #1 TDC to see if the silver marks on the chain lined up with the dimples on the cam sprocket and they did not. I am thinking that my last resort is to replace my tensioner with the newer version (and possibly purchasing a new timing chain) and line up my timing chain according to the manual. My question is has anyone run across this issue??? Can you shed any light on me? I just need help so I can enjoy the power of the SR20DE. This has been a dream project for me since 2001 and I finally got the funds and courage and a garage together to do it.