Porsche Enthusiasts Club Forum

Hi

I'm 16 and have worked all weekend every weekend raising the money for my 924 I bought in January. It's great when warm but when cold it starts and then dies after a few seconds. After ten minutes of repeating this process it stays warm and works. It's not the cold start valve or thermo time switch. Have you got any ideas?

Hi,

Have a look at this link,

http://www.924board.org/viewtopic.php?t ... 4e4aca1476


the Warm up Reg provides increased fuel pressure during warm up so its worth looking at.

I would start by checking the power +12v and Gnd to the two way amp conn at the WUR, ENG/RUN.

Let us know how you get on ? i've got the Bosch manual will send you a scan on it if you need it ok

Cheers

hi

no developments yet but a scan of the bosch manual would be great if possible

thanks

Will get it to you over the weekend

cheers

Here's the link to the test/repair procedure for the WUR http://www.landsharkoz.com/tt/ttwur.htm i know its for a 928 but the operating principle is the same..yours won't have a vac input
...They work by increasing the fuel pressure (via the galleries in the metering head)..at cold and as the bi-metal elem,ent heats up it backs of the fuel pressure off to normal.

If you bypass it and do a few stone cold starts and the engine starts ok, then its suspect.

The bosch book is to big a task to scan all of it !! i can do a few pages at a time. Let me know what you need /

cheers