Anyone here with CIS FI in a 914, six cylinder engine of course.. Options

[DougC]

I have a couple of CIS specific questions and was wondering if anyone on the list might be able to help?

Doug C

[lapuwali]

The 2.7 CIS is "basic" CIS. It requires almost no electrical power to start and run. Later versions (used on the later SC) had an O2 sensor, some electronics, and a control valve, they all required switched power. The 2.7 version, however, doesn't have this. With no power, you'll find cold starts to be harder, but not impossible. The cold start valve won't open, and the WUR will take much longer to stop adding "cold" enrichment. However, unless the temp outside is below 50dF, you shouldn't have any trouble starting the engine dead cold with no cold-start system.

Only the fuel pump and the ignition need power. The fuel pump can be checked by just feeling it with the power on. It should vibrate. You can also use a pressure gauge (rated for at least 10 bar or 150psi) on the fuel line between the pump and the fuel distributor. It should show 6-7 bar or around 80-100psi with the fuel pump on. If it doesn't, your fuel pump is bad, or perhaps your filter is terminally clogged. If you suspect the filter, place the pressure gauge just after the pump (before the filter).

If you have fuel pressure, take the airbox off, and take off the snorkel between the air meter and the throttle body. The air plate should be clean, and should move VERY easily (it goes up, so reach into the airbox and push it up with a finger). If there's any resistance, it's possible your fuel distributor is gummed up. Don't try to clean it yourself.

When starting CIS, you need to keep your foot OFF the gas while cranking. You may need to blip the throttle a tad AFTER it catches, but don't give it gas while it's cranking, or you'll discover why the airbox pop-off valves are so popular.