Hi there!
Recently my car just got a preoblem I cant figure out of.
I am currently running Apexi PFC D-Jetro (MAP sensors).
The issue is that when I drive normaly, on low RPM the car is hesitating and "jumpy", and when I release the throttle it will backfire all the time until I apply throttle again.
While this happens I can see on my hand commander that the ignition timing is going up and down at the same time as the backfires occurs.
Also the idle is rough, going up and down from about 900 rpm to about 1.3k rpm.
However, I can park the car and go for shopping or even fuel my car, and when I start it and drive, it behaves perfect with no backfires or no hesitation.
Also, about 70% of the time, if I rev the car and empty the gears to the revlimiter the issue will go away for a while, and then it comes back.
I have tried to wiggle cables, checking hoseclamps, replaced sparkplugs, replaced the CAS. But this issue is really something I cant figure out.
Anyone here with some tips on troubleshooting this issue?
Edit:
Here is two small videos that I made. taken only minutes after eachother, after some shopping.
Bad idle:
https://www.youtube.com/watch?v=T2MG9Pf_jeU
Good idle:
https://www.youtube.com/watch?v=h7mUYNZii0U
Best regards,
Thomas