The Doc's tranny waggin' Options

[Dr Evil]

I have a 3.0 system on a bastard 3.1 corvair engine. I "know" very little, exactly. I would like to be able to data track. I will check the fuel pressure, but A/F is still important and I may need to adjust the plate. I know the 914 needs the plate adjusted.

That's the least of it's issues..... (IMG:style_emoticons/default/hide.gif)

Mmmm, ya. (IMG:style_emoticons/default/dry.gif)

[Dr Evil]

So, where do you recommend checking and adjusting fuel pressure? At the spring in the distributor?

[Dave_Darling]

There are several key "fuel pressures" in the CIS system. The delivery pressure (like you'd check on a 914) is the least of it. There is a "control pressure" and at least one other that you check. Those vary depending on load, O2 sensor feedback, warmup status, and so on. The system varies pressure in those circuits to deliver more fuel or less fuel.

Read up on CIS, it's a really weird hydraulic-based system. It's even a little weird when compared to screwy analog-electronic controlled systems like D-jet!!

--DD

[Dr Evil]

I have read up on the CIS, and I have the basic so no 02 or lambda stuff. What I want to know is why I would go all over and check every pressure when all I did was put the system from one engine onto another. It is appearing like I will have to make several special fittings to check every fucking pressure. It ran, it just would not start warm sometimes (flooded), and is hard to cold start so the injector may be crap.

[Dr Evil]

Nice links, Rick. Good refresher. I dont know if my AAR is working, my CSV is working, my WUR is working. I turned the key and drove it around lake Ontario....getting shitty mileage from the too tall gearing in the diff.

[rick 918-S]

Set the pressure with the WUR. Add the special gauge set that is designed for this to your tool box if you want to add cool tools.

Seriously, I had the same issue. I never messed with the WUR or any of the settings. I bolted a complete 928 engine to my adaptor plate in my car. Never touched the WUR. My mileage at start up was 18. Shortly after I drove the car it started to drop. On one trip to the WCR I stopped at Carl's place in Vegas with John Peterson. We managed to stabilize the mileage at 10 mpg by messing with the sensor plate and a sniffer.

I tried all the hocus pocus with the 02 sniffer and the sensor plate tweek. I tried to pay shops to check things out. All they wanted to do was tweek the sensor plate. A couple old Volvo guys even told me they no longer had special tools. I located a gauge and a shop that knows the system. They refused to work on the engine but borrowed me the gauges. WHAM! fixed.

Get everything working and wired correctly. Adjust the WUR first, lean out the sensor plate after as you adjust the idle. You won't believe the difference.

[Dr Evil]

This is funny. I didnt even know I had a problem and now I am on the way to, hopefully, fixing it. I figured; Bus = low mpg.

Any idea what the special tools are called? Pics? I will do some googling. I am typing between seeing patients so that is why I am not quick on the search function.

[rick 918-S]

This is funny. I didnt even know I had a problem and now I am on the way to, hopefully, fixing it. I figured; Bus = low mpg.

Any idea what the special tools are called? Pics? I will do some googling. I am typing between seeing patients so that is why I am not quick on the search function.

https://www.google.com/#q=cis%20fuel%20pres...ge&safe=off

Get the one that say's it's for K-Jet. Not all gauges are created equal.

[Dr Evil]

Just ordered, thanks. Gonna be interesting.

[Dave_Darling]

What I want to know is why I would go all over and check every pressure when all I did was put the system from one engine onto another.

Because the pressures are the control signals for the injection. So if the cam, compression, exhaust, intake flow, yadda yadda, are different on the second motor than the first, the signals will be wrong for the second motor. Kind of like when you take a VW 1600 MPS and bolt it up to your 2230cc hot-rod motor and it runs for crap--you have to adjust it. Or if you tear a set of Webers off an early 911S motor and put them on a 3.6--you have to re-jet, right?

--DD

[Dr Evil]

Came home after working 12.5hr shift, put some work in on the bus and hope to have it running tomorrow so I dont have to ride to Scooters in the rain.

[Dr Evil]

The plan last night was to sleep in the bus, in a parking lot....but it was supposed to be Scott Burnett's shop lot not Sheetz. I am fortunate to have been able to make it to Sheetz on what felt like 5 cylinders as I have food, bathroom, and internet. Waiting for my tow from Scotty to Scotty's. Time to source some cheap wheels while the bus is hard down. My 6hr trip was going to take 9 last night before the breakdown. I tried to go through the middle of WV, got lost, asked for directions, and came out about 80-100mi off target. No phone service for much of the drive, no directions on the phone. I ended up on 92 for most of the trip and popped out at 64......way away from where I intended. Ah well, adventures. Tonka is doing fine.

[wingnut86]

Doc,

See if the American Racing wheels & new tires fit your bus that I left at Scotty's...

Dave

[rick 918-S]

Not sure I posted this link.

http://www.porsche928forums.com/download/m.../CISRebuild.pdf

[Dr Evil]

Thanks! I got my K-jet tester. Now, I just have to wait for engine part and I can start tuning the beast.

[Dr Evil]

Well, I am way overdue for an update.

The bus is down. On a trip to Scotty B's shop I lost some power and later found that I had snapped a rocker stud. I would guess that one of the circlips came off, the needle bearing let go, then the head cocked, then the stud broke.

I called the guy who makes and sells these. He lives in Canada during the summer and in AZ in the winter. He was surprised, very nice to deal with, and is sending out repair parts today. This is actually an easy fix and the failure mode protected the drive train (IMG:style_emoticons/default/smile.gif) Silver lining.

The carnage.

[Dr Evil]

Well, I got home yesterday from being out of town. My new roller rocker arrived.....it was for the intake valve :facepalm: I called the guy, he apologized and will get me the exhaust one out in the next 32 hours.

[Dr Evil]

Well, shit. I was all set to get the replacement rocker installed and get back on the road today. However, I decided to take a better look at the remaining rockers. Most of them look like they were about to have the same failure. WTF?

The bushing that the needle bearing is held into is coming out of many of them, the rockers are migrating to the side for reasons I do not know, and rubbing on the stud. This is obviously what happened to the one that failed.

So, I removed all of them and am not sure what the hell I am going to do. I need to call the guy that sells this kit and find out why most of them are not staying centered.

[balljoint]

(IMG:style_emoticons/default/confused24.gif)

Weird. Did you leave it parked on a hill?

[bulitt]

You have stubby fingers.