air fuel mixture monitor

[chitwnvw]

Any one have any experience with these?

http://store.summitracing.com/partdetai ... toview=sku

Where could the sensor be placed to monitor all four cylinders?

Saw one on ebay, an older one, that worked by feeding a tube up the exhaust. Don't know how my bus feels about that, but if it's just an annual exam kind of thing...anyway the ebay one was missing the tube, don't know if this is something that could be rigged. I'm not sure how I feel about hooking up lots of gauges, ran a wire from the coil up so that I could hook up my dwell/tach and get an idea where in the rpm band I was having trouble, and it really distracted me from listening and feeling how the bus was running. So best world, I'd like to have a diagnostic tool if anyone knows of anything out there...thanks.

[dingo]

Theres this guy on Samba 'Bill'..who uses a simple 02 sensor and rich/lean guage ...his rig is set-up with f.i....but for carbs you could probably use the same idea

I asked him for details, like location etc.:
I

chose the left (cyl. #3&4) exhuast elbow, above the seam. Not necessary to weld on the threaded collar that will probibly come with a kit. Careful selection of the right diameter drill will allow friction fit of the probe (not the threads, just the probe bulb), then lock it with wire wrap around elbow.

so called "wide range" oxygen sensors are a waste but do use the four wire sensor with the heater spliced in at #15+ on coil. luck, bill

Its on my list of projects..just havent gotten around to it...yet.

[vwlover77]

I sent an e-mail to Edelbrock about that monitor. Problem is that the cable harness they provide is far too short to run from the back of the bus to the front - it's designed for front-engine cars. You could extend it yourself, though, I guess.

With the exhaust setup I've got, the only place to catch all 4 cylinders would be the outlet of the muffler. I'm not sure the exhaust gas would be hot enough at that location to properly heat the sensor.

[Amskeptic]

the only place to catch all 4 cylinders would be the outlet of the muffler. I'm not sure the exhaust gas would be hot enough at that location to properly heat the sensor.

Inlet of single entry mufflers. That is why VW went all goofy with the jacketed catalyst exhaust systems, to collect it all in one place and be hot enough to light off the catalyst.

Dual inlet mufflers (all buses before 1975) you'll have to tap the manifolds close to the exhaust ports.

[hambone]

Interesting how the same vehicles can be either ox-cart simple or hi-tech, depending upon the owner's particular madness.

[chitwnvw]

Dual inlet mufflers (all buses before 1975) you'll have to tap the manifolds close to the exhaust ports.

Soooo, two sensors....

Hambone, Eric says, hi! Sweet bus you scored him!

[Amskeptic]

Dual inlet mufflers (all buses before 1975) you'll have to tap the manifolds close to the exhaust ports.

Soooo, two sensors....

Hambone, Eric says, hi! Sweet bus you scored him!

4 actually. Each pipe is dedicated. You cannot get a proper sample otherwise. It all seems a little much.
Colin