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Title: Upgrading to larger throttle body Post by: needlessthing on April 22, 2017, 09:48:54 PM 03 jetta 1.8t with IE intake manifold, Autotech intake cam, GTX 3071r turbo.
Still have a MAF (running an S4 maf). I am using Maestor tuning. Which I know this is not the best place for maestro support but VWVortex forums have been little to no help. Some of the guys on here have been a great help in the past. And frankly I am at a slight lose here. I had a 70mm throttle body laying around so I thought I would throw it on the car. Thinking that the MAF would compensate for the increased air flow. With the larger throttle body on the car it will idle but super lean. Must the air flow maps be adjusted. I was under the impression that the ECU doesn't use the airflow over throttle maps unless it has no signal from the MAF. If anyone could help me out that would be great. Thank you in advance. Title: Re: Upgrading to larger throttle body Post by: nyet on April 23, 2017, 05:35:11 AM Changing throttle body will not magically compensate for a larger MAF.
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