81 911sc CIS lambda MIA

[marty911sc]

Update:
WUR ......045
FD..........061
As requested. So what does this say?
I found a Vacuum leak at the vacuum advance.

[marty911sc]

The Wur Id 045 crosses to a '79 in two sources.
I have a ROW '80
I couldn't find the FD ..061 on the Jim's cross

[marty911sc]

Bump

[GaryR]

Marty - the only symptom is no cold start? Is the CSV getting energized? With the engine cold, the key on and the air cleaner out, depress the throttle plate (should hear the injectors squealing) for a second or two, button it up and try and start it. I bet she starts. If thats the case either the thermal switch (left side cam cover) is bad or isn't getting power (yellow wire on the starter solenoid connected?), or the Cold Start Injector (rear of throttle body and next to impossible to see) is disconnected. Sounds like the cold start injector isn't spraying and you are doing it manually with starter fluid, but of course I could be way off too....

[boyt911sc]

Marty,

Could you post the fuel pressure readings for:

Cold control pressure
Warm control pressure
System pressure
Residual fuel pressure

What is the resistance (Ohms) of the WUR-045?

Approximately how many minutes from cold start to get the 'stabilized' WCP? Thanks.

Tony

[marty911sc]

This is a deep thread. I should summarize.
WUR 045
FD Bosch 061

no start and hunting / stalling until warmup.

The car was setting a lot before I bought.
After I start it for the day it mostly always starts
This problem seems have gone away.I was told it had a larger fuel pump , and because of this it wouldn't prime quickly.

Check garyr; CVS was my first lost thought when I first bought the car.
It should always always act like it wants to run when starting!?
Check for fuel pressure by bumping the plate and listening for flow. I have to go there anyway to spray.
If I hear flow, Then Run down a CVS issue. No power from starter, TS, clogged CVS.


hunting and stalling issue until warmup.

If I let the pedal drop gingerly, the car settles to a stable idle.
If I drop the pedal, it hunts. Repeatable.
Checked the throttle linkage, looks refreshed, lubed linkage. Throttle shaft bushings seem tight.
FD Plate moves freely, in all velocity and hight actions.
Sensor Plate hits metal and slightly bounces when released

[timmy2]

Follow the lower vacuum line from your WUR back to where it originates, where does it end up and what else is in that vacuum circuit?
Same drill for the one coming off the top of the WUR .

[marty911sc]

Update:

Read WUR Resistance@ 24.7 ohms
Pressures readings pending gauge
Eng compart vac line insp:
Fuel line Chaffing.
Brittle brake booster line . Replacement pending PO.
R&R vac adv line. 7/64in
Traced WUR upper line to throttle body.
Traced WUR lower to vacsw.

Front brake and line inspect pending.
Brake fluid on pedals, rear brakes slow to release, prior overheat.
R&R master cylinder. Recheck for leaks at pres & resv fittings and Brake sensors, no crush gasket in kit. Reservoir fittings damaged, res hose & grommet good.
DR brake cylinder blown. Hard line and hose poor. Full rear brake refresh. pending PO
Brake fluid seeping on pedal quadrant for extended period.
Ext Damage to pedal escutcheon. Replacement Pending PO
Paint damage to Drvr floor pan Remove quad and paint pan and quad. pending repair of brakes.
Vacuum bleed brakes, check for reservoir cap vac adaptor.

[marty911sc]

Update:
Yes I need to check pressure. I had to get the brakes fixed.
I'm taking this time to find and learn the parts a pieces. A bit of a learning curve. No worries.

The car is consistantly starting.
The car is consistantly hunting eventually stalling if i snap off the throttle.
The car consistantly settles to a 950 idle if a gentle release the peddle during warmup.
Warmup up is choking burning rich,no smoke.
The car consistantly stays at 950 all the time.
After 10-15 min all is well as temp approaches the end of the white box . Is this first tick?

I hear the injectors squealing when I touch the plate not running ign on.
If a breath on the plate at warm up idle the car stall instantly.
Tapping after warmup, it acts like the thread on manual (good )mixture setting procedure.



After reading up, I need to see what's up,with the AAR. Is this on the right cam cover?
I going to inspect the opening . then release the clamp to the AAR to create a leak and see what happens.
Ill ohm it out also.

It seems my 045 Wur is hooked up like RoW. The top vacuum is hooked to top throttle above the plugged air pump connection. I saw the thread on the 83 row vareen . it makes rich under full throttle? I'm piecing the 045 workings but could use a link that describes how it all works with the vac switch on the bottom atmosphere hookup also.


4 throttle bypass mecho's
Idle set screw found
AAV Negative
AAR found if on rt valve cover
decel Back off throttle body?
I could use one handy link that dipicts and locates all these.
Thanx

[marty911sc]

Bump

[marty911sc]

blitz fuel injection install manual has a good locator guide for components