I don't know about the MAF vs MAP sensor...whatever the vanagon uses, that is what I think I have....they just stuck some pipe onto the end of the Vanagon air filter assembly to run the intake around to the throttle body of the inline motor....There is a rectangular box between the filter and the rest of the 'plumbing' that has a long flat many wire plug.... I do have a 3 wire O2 sensor. That may be a contributing factor as it is now about 60k miles old and runs on only one of the two downpipes I have into my cat-less custom exhaust......"cooling down too much" on the O2 sensor, that could also be part of the issue, I suppose....It does seem slightly more likely to hesitate when it is really cold outside, or when I am up in the high mountains... I'll be working on all these 'possibles' soon. I have a spare new O2 sensor that should go in anyhow and some adjusting of the throttle switch is probably also due...as you say, it is a wear-item, being mechanical.... On a different note, the van behaves like a "Sports Car" without all that weight I was toting around all winter.... Don Hanson On Sun, Mar 10, 2013 at 3:27 PM, Scott Daniel - Turbovans < scottdaniel@turbovans.com> wrote: > What I aim for on throttle switch at idle is .. > as close as you can get it to breaking contact 'just barely' off of full > idle .. > and as long as it always makes contact at idle every time. > > need to have a little bit of throttle cable freeplay too of course. > > Do you have a 3 wire heated oxygen sensor ? > and is it working ? > if it's non-heated ( should be heated on your engine ) it may be cooling > off too much during deceleration for more than a little bit. > I forget if you have an Air Flow Meter or an Air Mass Meter . > which one please ? > scott > |
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