Very disappointed, am I loosing time on my car? Options

[VINCE]

I feel very bad tonight. I bought my first 914 one month ago. I am working on it every evening since one month and sometimes until midnight (it is very cold in my garage)... (IMG:style_emoticons/default/sad.gif)

I think I am loosing time. The more I do, the worst it is. The L-jetronic make me crazy (the 914 is a stock 1.8L from 75).
For example, the engine was runnig two days ago (only on idle because if I tried to open throttle the engine was dying): my cold start valve was OK. And tonight, the cold start valve is not working anymore!!! What is wrong? I don't understand.
It seems I have fuel pressure because when I disconnect the fuel pressure regulator I see a fuel spray. I don't understand how this cold start valve is working. Wich sensor is related to the cold start valve?
It is the same thing for the 4 other injectors... I have no fuel spray.

I have tested (according the Haynes diagnostic method) the air intake sensor
and the throttle body and they are OK.
The only thing I am dubious is the temperature sensor II. Where is it? How I disconect it?

I really need to fix it quickly because it is my daily driver. Should I carb? With what carbs? I need the car run in winter but I don't need more hp. Is it possible to find and adapt 40 PDSI? Can I find manifold and throttle linkage for 40PDSI quickly?
Should I try to continue fix my L-Jetronic?
Should I buy an other car?

Please, help me. I am sure some of you have been in the same situation.

Thanks

Vince

[double-a]

i had some of the same problems with my 1.8, and i found a lot of good info here:

http://manuals.type4.org/ljet

~a

[VINCE]

One more a night in my garage for nothing...
I have tested the wiring harness according the website link you gave me: everyting seems to be working... exept for the resistance between ECU plug terminal 20 and system ground at terminal 17 with ignition ON: I have 647 ohms (Test Chart says 52-78 ohms). Does that means that my fuel pump relay is defective? I don't think so because I can activate fuel pump by pressing the AFM flap witouht any problem.
Underlined wires on the enclosed FI wiring harness diagram are OK: I have tested all of them yesterday evening. I have 2-3 ohm for each injector. 4 ohm for cold start valve injector.

Is it possible that the ECU is defective? How can I test it?
When I start the engine I have no spray at the cold start valve even if the wiring connections seem to be OK. Can I put 12V and ground to my cold start valve to see if it is working?

The engine was runnig sunday evening, so I don't think I have an ignition problem.
Fuel pressure seems to be good because I have a spray when I disconnect a fuel hose.

Thank you for your help.

Vince

[Mid_Engine_914]

When I start the engine I have no spray at the cold start valve even if the wiring connections seem to be OK. Can I put 12V and ground to my cold start valve to see if it is working?

Vince

Did you test the resistance in the cold start valve's windings? You should measure about 4 ohms between terminals 45 and 46 in your pic.

You should also have continuity between terminal 45 and thermo-time terminal G (see figs. 6 and 7 in your pic) and terminal 46 and thermo-time terminal W.