vacuum leak or air problem???

Post by **Westy.Club.Joker** » 30 Nov 2006, 22:33

Looks like that sensor has a white wire to it, and maybe a brown as well? It`s the only likely looking one in the wiring diagram. What year is your Vanagon mate?

Post by **kevtherev** » 30 Nov 2006, 22:38

he said this in his post in chat

sambagis wrote: 84' 1.9L Vanagon
Stephen

Post by **HarryMann** » 30 Nov 2006, 23:53

Yup follow up CJ's tip and get back, whatever happens get back and say what the outocome is, but one thing at a time is best.

Post by **sambagis** » 01 Dec 2006, 00:06

Westy.Club.Joker
Yeap, its and 84' vanagon. So it has a white wire and possible a brown one. Any idea where in the engine compartment to look and what the sensor looks like?? My bently manual is in the mail but still have not received it yet. Bummer.

HarryMann
Will try and figure where that thing is if it exists on the model. Will let you all know.

Stephen [/quote]

Post by **HarryMann** » 01 Dec 2006, 01:24

There are 2 temp sensors, Sensor 1 (Inlet Air Temp in the AFM unit) and Sensor II (water temp)

Temp Sensor II is usually the one that plays up and is mounted in the thermostat housing (NB. there might also on your model be a temp sender for the temp gauge there too).
TII sensor prob has Br/Blue wire to earth and White back to pin 2 on the Fuel Control Unit.

This runs a high resistance when cold and low resistance when fully hot (2.5Kohms @ 20C; 200 Ohms @100C). If the engine is hot and you measure more than 500 Ohms, then that might be it, or the wiring is open circuit and broken (known this, engine starts but runs rough and very rich, floods and doesn't like restarting - so wiggle those wires to see if it runs better). Just disconnecting plug (spring clip secures) is simulating cold condition!

Bentley page 24.19 and 24.20 when it arrives!

Somehow think its more than the T II sensor though.

Post by **sambagis** » 01 Dec 2006, 01:45

Well, Ill do as you say and track these sensors down and test them. Will let you know what happens tomorrow. Its about 4PM here in sunny Hawaii so will respond in about 16 hours or so. Talk to ya then.

Stephen

Post by **sambagis** » 01 Dec 2006, 20:52

HarryMan and CJ,
Looks like the mystery may be solved. Cant say for absolutely sure but it seems to be starting fine now.

Looks like CJ's idea was on the right track, I checked all the connections to the temp sensors and found that one of the wires that is connected to the temp sensor on the water pump was loose / disconnected. I had not noticed it before as it has a clip housing

but when I disconnected the clip to check the connection one of the wires was most of the way out. Any way, I put it back in, reconnected and started it up. Let it run for some time (15min) and shut it down. The moment of truth, it restarted just like it should. I then let it cool for 15 or 20 min and tried to restart and it worked great! Ill see how it starts when I get home this afternoon but for the time being looks like you all did it. I cant thank you enough. Hopefully I can be of help to someone else and will continue to be a part of your community if thats OK with everyone. Thanks again.

Aloha,
Stephen

Post by **kevtherev** » 02 Dec 2006, 14:35

thats great news Stephen ....and a result for 80-90 solving a problem in a van in Hawaii....incredible

what times we live in.