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3.3TT Jb4 issues - Log check

Jkstinger04

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May 18, 2021
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Hi I have had the jb4 on for almost 10k miles with no issues, recently notice the car stuttering and losing some power when at 75% throttle but would seem to clear when at 100% throttle but then one time it backfired and seemed to put the car in a limp mode. I let the car sit for a little and now every time I run map 1 or 2 as soon as I go 100% throttle the car starts backfiring and not making much power. I can ease into the throttle and the car seems fine and there are no codes or anything. If I start the car in map 0 the car seems to run fine but if I switch to map 0 after having problems with map 1 or 2 the same problem occurs with map 0. I have the denso sparkplugs gapped to the proper gap but I am planning on checking them again and also completely removing the jb4 to see if any issues continue. I have logs from doing a couple of pulls in the 3 different maps if someone could check them or if anyone has any other advice that would be great. I'm not sure how to upload the logs to this post if anyone can also help with that
 
Same as on another forum but I'll add there's a possibility you have a bad tank of gas, I've seen the same issues until they ran it out and filled up on better stuff.
 
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