Date: Mon, 26 Jan 2015 19:02:35 -0500
Reply-To: Larry Alofs <lalofs@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Larry Alofs <lalofs@GMAIL.COM>
Subject: Re: Tips on replacing Temp 2 sensor The easy way!
In-Reply-To: <022f01d039c3$2c5a0f50$850e2df0$@gmail.com>
Content-Type: text/plain; charset=UTF-8
Maybe you could try measuring the resistance of the sensor while it's in
place. Unplug the connector and hook up your ohmmeter. Check the temp of
the thermostat housing with your IR thermometer and compare the readings to
the chart in the Bentley.
Warm it up and repeat to get more data.
Just a thought...
Larry A.
On Mon, Jan 26, 2015 at 6:52 PM, Stuart MacMillan <stuartmacm@gmail.com>
wrote:
> Thanks Dennis, I'll likely be contacting you.
>
> This engine runs strong, much stronger than my '85, it's just had idle
> problems (2000 rpm or nothing), after that was fixed it started to cut out
> under load around 30 mph and above, fixed that, and now it's got the
> problems I mentioned earlier.
>
> Yesterday I checked the timing and set the idle (again). I was not able to
> start the vehicle with the temp 2, O2, and idle control valve all
> unplugged,
> but plugging them in I could start it, and I unplugged the temp 2 and ICV
> to
> set the timing to 900 or so, and turning the screw gave me a good rpm
> response.
>
> Then I plugged in the ICV and the idle went up to about 950-1000, and then
> I
> plugged in the T2 sensor, and the idle got slightly rough, like it was
> rich.
> It smelled rich.
>
> Test drove it, drove fine, and the idle was stable, but a bit over 1000.
>
> The parts are cheap, and he wants to replace EVERYTHING anyway given his
> lack of faith (and experience) in old cars. He's been spoiled by modern
> vehicles that never fail. I can't blame him.
>
> Rock Auto has the Bosch OEM O2 sensor for $55 delivered, BTW.
>
> Stuart
>
>
>
> -----Original Message-----
> From: Dennis Haynes [mailto:d23haynes57@hotmail.com]
> Sent: Monday, January 26, 2015 3:12 PM
> To: 'Stuart MacMillan'; vanagon@GERRY.VANAGON.COM
> Cc: 'Jim Felder'; 'Neil N'; 'OlRivrRat'
> Subject: RE: Tips on replacing Temp 2 sensor The easy way!
>
> Part of the problem here is the replacing of parts without real trouble
> shooting and diagnosis. There are many things that can cause your symptoms
> including an engine problem or maybe even vacuum leaks. About two years ago
> one of our list members was down in Florida with all sorts of problems. He
> had swapped out many fuel injection parts to no avail. Since I was nearby I
> offered to pay a visit to see if I could help. As soon as the engine
> started
> I knew something inside was wrong. Since the #1 intake runner was getting
> warm I started there. I removed the rocker cover and there was the intake
> valve spring lying on the bottom. The valve stem wore the point the spring
> keepers fell off and the valve just stayed open. That is just one example.
>
> As for running rich that can be tested with the O2 sensor. If you smell
> unburned fuel the mixture could be right but for some reason all cylinders
> are not firing. The idle stabilizer system is a separate add on. It can be
> disabled and you should be able to get the engine running without it. Every
> part of this fuel injection and ignition system can be tested and the real
> problem sorted out. If I can be of assistance let me know.
>
> Dennis
>
>
> -----Original Message-----
> From: Stuart MacMillan [mailto:stuartmacm@gmail.com]
> Sent: Monday, January 26, 2015 3:01 PM
> To: vanagon@GERRY.VANAGON.COM
> Cc: 'Jim Felder'; 'Neil N'; OlRivrRat; Dennis Haynes
> Subject: RE: Tips on replacing Temp 2 sensor The easy way!
>
> Great tips, thanks all!
>
> Unfortunately, there have been so many run problems with this van (he's
> been
> stranded twice) my son has no confidence in it, which is unfortunate, since
> I encouraged him to buy it. So, with these last two items I'll have
> replaced almost everything:
>
> Starter (Go Westy gear reduction)
> Alternator
> Alternator wiring to starter (Go Westy kit)
> Grounds: Cleaned connections in engine compartment, replaced battery ground
> strap and checked transmission ground strap Fuel lines Fuel pump & filter
> Set throttle switch Cleaned throttle body Checked AFM resistance Checked
> for
> vacuum leaks Rebuilt injectors Replaced idle control module Capacitor fix
> in
> AFM New tune-up parts and set timing PO put in a GT rebuild AT, water pump,
> battery, and replaced the fuel tank vent lines and grommets.
>
> Only thing left after O2 and Temp 2 is the idle control valve, which checks
> out as far as I can tell.
>
> I'm hoping we can drive it around town for a few hundred miles and get he
> gets his confidence back with "everything new".
>
> Stuart
>
> -----Original Message-----
> From: Dennis Haynes [mailto:d23haynes57@hotmail.com]
> Sent: Monday, January 26, 2015 11:11 AM
> To: 'Stuart MacMillan'; vanagon@GERRY.VANAGON.COM
> Subject: RE: Tips on replacing Temp 2 sensor The easy way!
>
> Engine cold
> Pinch hose or plug overflow vent on pressure cap. If air can't get in
> coolant won't flow out.
> Prep new sensor with O-ring.
> Remove clip.
> Quickly remove sensor, look for O-ring. Reach in and remove if stuck.
> Insert new sensor with O-ring.
> Insert clip.
> Remove plug/cap.
> Remove pressure cap. Top off coolant.
> Replace cap and connect hose.
>
> Done.
> You should only loose a quart or so this way.
>
> Dennis
>
>
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
> Stuart MacMillan
> Sent: Monday, January 26, 2015 11:54 AM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Tips on replacing Temp 2 sensor
>
> Still chasing bugs in my son's '87, and I'm going to replace it and the O2
> sensor. It's got erratic high idle, stumbling when cold, and I think it's
> running rich when warmed up.
>
>
>
> Just wondering if there is a way to minimize coolant loss.
>
>
>
> There are a lot of pipes into the T-stat housing, and I can't clamp them
> all
> off. And, does the O-ring tend to stay in the bore and need to be hooked
> out, or will it come out with the old sender? I'm going to replace it.
>
>
>
> I may just use this as an excuse to flush and replace the coolant if I'm
> going to lose a lot anyway.
>
>
>
> Thanks!
>
>
>
> Stuart
>
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