Date: Sun, 8 Jun 2014 21:07:48 -0400
Reply-To: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Subject: Re: 88GL - Intermittent Failure to Start Continues
In-Reply-To: <CAHTkEuJ_k3nyYYUyeimbUSsePjZDNzTAnsAdD7u-KcOhsxhy1Q@mail.gmail.com>
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Except for the el cheapo re-pops it is very rare for these sensors to go bad. What does fail is the connection at the connector contacts. Of course the act of changing the sensor requires disconnecting and reconnecting and that wiping action usually improves the contact enough for things to work again so we think the old sensor was bad. The other problem with this circuit is that the idle system uses the same sensor. As such a bad connection or bad ground can really make things wonky. Hot restart issues can be the first symptom.
Dennis
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Don Hanson
Sent: Sunday, June 8, 2014 6:05 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: 88GL - Intermittent Failure to Start Continues
Yes, Temp II sensor is common among VWs and inexpensive. Also a frequent failing part, so even if it isn't the cause of your current problem you are wise to have a spare available onboard.
I think you can actually take the temperature gauge sender...it's the other one that looks sort of the same but is black not blue (on my van anyhow with a Jetta motor) and you can switch the two...I could be wrong on this interchange suggestion..regardless, they're cheap. You can probably get one at a chain autoparts, even.
On Sun, Jun 8, 2014 at 2:58 PM, JRodgers <jrodgers113@gmail.com> wrote:
> I'm still dealing with this failure to start issue, even though engine
> turns well.
>
> When I tested power on the Hall sender - it was good.
>
> When I tested ignition control and the coil - both appeared good.
>
> Yet still it has times when it fails to start after a shutdown.
>
> I have noticed a couple of times that there was an after fire or two
> or three. Don't think it was a back fire - that would have been back
> up through the intake system. But in any case - it would not start.
> But the after fire makes me suspicious of a temp II problem.
>
> Anyone care to weigh in on this? I'm down to the point of starting to
> replace parts without knowing which part is actually at fault. That
> gets expensive.
>
> One last thing - is the Vanagon temp II sensor a common sensor part to
> other VW's.
>
> Thanks,
>
> John
>
