anybody here with a jantszer ported throttle body installed.

[SunlitComet]

Once installed did you see a mileage drop or have to get your pcm tuned because it may have been overbored or causing fuel trim correction errors?

 

[gpracer1]

I have one. I don't remember how much later I got the tune, but I didn't have any codes or problems before or after.

With the removal of the stock throttle blade damper, it flows much more air much sooner with very little throttle opening. I had the 0411 PCM when I installed the jantzer tb, maybe it can handle it better than the oem PCM?

If you want good mileage you will have to be VERY gentle with the throttle opening. City mileage can be worse now because you are giving more throttle opening and sooner than you think at a faster rate. You just have to adjust your driving style.

You can really tell when you watch the MAF flow at 10-20% throttle.

 

[SunlitComet]

city has dropped below 9 and highway below 12 since installed. that is about a 25% drop for me. i am hoping to see the 0411 to adjust for it or will it be necessary to adjust idle air base to fix the problem. i probably wont have the 0411 put in till next week tho. i still need to add the tranny gear selection circuits and need to empty the tank of the existing fuel which is really easy right now.