Usually one or both of the fan resistors (for the two fans you have) are burnt up.? P/n?701959263D.? If one is burnt up, the other is not long for proper operation either.? Replace both at the same time.? ?Looks like these are available in a lot of places.? If you know how to test a resistor you can confirm that the resistors are good (or bad).? Resistors are located at front of engine.? Have to remove engine lower cowling cover to access directly under the fans.? There are other things that can fail- fan relays, for example, but go for low hanging fruit first.? Be sure that the compressor is turning-? you can tell when you turn the engine on by the additional load.? ??

On Jul 26, 2022, at 1:21 PM, Jonathan Mackenzie via groups.io <jonathanmackenzie@...> wrote:

That sounds like a pretty good stress test. I would have expected the check engine light to come on, or at least it could throw an evap code.

Is there a chance that some charcoal dust made its way into the N80 valve filter?

- Jonathan

On Tuesday, July 26, 2022 at 09:59:05 AM PDT, Michael Diehr <md03@...> wrote:


I'm downgrading this from "reliable" to "mostly reliable":

I'm back from a longer more challenging trip and have mostly success to report, but one failure: After a multi hour drive in temperatures that hit 108F at one point, I filled up with gas at around 4000' elevation, and then drove another 60 miles (in 100F+ temperatures) and ended the drive with final quick uphill to 7500' over about 10 miles. When I stopped the van there was a strong smell of gas, and fumes were escaping from under the van, near the gas tank and my GM vapor canister. There were also gurgling noises, as if the gas in the tank were boiling. I opened the gas cap and there was some pressure release (but not as much as in prior years before this modification). In about a minute everything was OK again, and the rest of the trip was uneventful. There was no smell of gasoline in the engine compartment, nor around the gas cap.

I could not tell whether I had a loose connection to the vapor canister or the gas fumes were venting from some other location.

As I understand it, the entire fuel system is supposed to remain sealed normally. But I assume there must be a pressure release mechanism in case of overpressure, right? If there is an overpressure vent, where is it located? Is it possible that even in a perfectly functional eurovan, extremes of temperature + altitude could overwhelm the vapor canister and cause venting?

On Jul 3, 2022, at 2:11 PM, Michael Diehr <md03@...> wrote:

I'm back from another trip, and happy to report the canister replacement is working great. I've driven about 750 miles with it, and done two stress tests: where I drove from sea level to 5000' elevation in 95F temps, and another where I drove to 5000' in about 100F temps, filled up with gas, and immediately drove up to 7500'.

In the past, these situations would have resulted in tons of gasoline fumes, but with the 215-464 canister, it behaved normally.

I'm going to call this a "reliable" fix so far.

On Jul 3, 2022, at 2:11 PM, Michael Diehr <md03@...> wrote:

I'm back from another trip, and happy to report the canister replacement is working great. I've driven about 750 miles with it, and done two stress tests: where I drove from sea level to 5000' elevation in 95F temps, and another where I drove to 5000' in about 100F temps, filled up with gas, and immediately drove up to 7500'.

In the past, these situations would have resulted in tons of gasoline fumes, but with the 215-464 canister, it behaved normally.

I'm going to call this a "reliable" fix so far.

On Jul 5, 2022, at 3:19 PM, moedig <maurice@...> wrote:

?

Yes T4 is the designation for “Transporter”.? “4” is the generation.? The friendly name is called the “Eurovan”? ?