Heres something that makes you glad you drive a volvo.

not to long ago i had my turbo rebuilt a dvalve job and a new head gas replace fixed, after this was all done that car would not run right for the life of it i started to investigate only to find when i grabbed the central wire harness the car shut off bad move the car ran even worse at that point, so i replaced it good move the car somewhat ran good again but still didnt idle right or start right, investigated alittle futher, found the harness shorted out the computer, replaced that even better still not running right, so figured it took the iac motor with it replaced that running perfect when warm! come to find out that wire harness was attached to the CSV which i havent messed with yet, i just give it a dozen cranks in the morning and give it alittle gas and once it catches i hold it at about 1500-2000 rpms till i hear the ocmputer click then i drop it to 12-1400 rpms wait a few more min kick it in gear and hold the gas till she warms up good to go after that, ill get the CSV done eventually. NOW doesnt it make you feal good that your driving a car that when everythings out it still will run?

Steve, I had a bad CSI on an old 76 Audi 100LS (CIS FI). The injector pintle had sort of eroded away. When I removed it from the manifold (keeping fuel line attached), and stuck it in a glass jar, and cranked the starter, a copious stream of fuel shot out (no nice spray pattern). Replacing the cold start valve (cold start injector) cured the problem. Symptom was rich running/stalling for first 30 to 40 seconds after a cold start.

I had a problem in that my Cold start injector wouldn't shut off. Mine's an '82 244 so it's a whole different FI system but perhaps the CSI isn't so different between them. Maybe try starting the car with the CSI on and as soon as the car starts, unhook its wire harness. If it reacts to that and evens out, that may be it. That's what singled out mine. In the end I just clipped the harness and put it on a switch on the console.

Hope this is of use,

Will R.

Whoops sorry just read your post again, it's two in the morning and I have a mental blindspot on acronyms

Regards

I just did a load of work on a 760 turbo. When it came to me it wasn't running at all but apparently the problem had started with it running excessively rich on startup. It turned out it had a leaking diaphragm in the fuel pressure relief valve. I had checked the fuel pressure and it seemed OK. Happened to disconnect the vacuum hose to the valve from the manifold and had fuel leaking out.

Lot easier to get at for a first check than the cold start valve.

Regards

Hi.

Would'nt a leaking injector make the engine stumble, run rough?