[B Frye]

Here's a funny one, not ha-ha funny but odd funny.

Tail pipe emissions for the wifes '76 914 are as follows:

Nearly perfect at idle.
RPM: 988
HC: 44 ppm
CO: %1.10
CO2: %13.4
02: %1.1

However, at high RPM the CO is way too high.
RPM: 2443
HC: 117 ppm
CO: %5.85
CO2: %11.1
02: %0.1

This is directly opposite from what I am use to regarding air cooled engines. I usualy expect a rich condition at idle but good readings at higher rpms.

The engine in question is a 4 cyl 2.0L w/DJet F.I.
All components in the FI have been checked out.
Ignition timing is per spec.
The compression in all cylinders ranges between 140 and 144 psi.
All hoses are good.

The car is stone stock. No deviation from factory specifications.

Any ideas?


UPDATE:

I checked for a vacuum leak and did not find one. Also, rechecked the dwell, timing, and valve settings.

I agree with D.D., I don't want to mess with the MPS. Too expensive if I screw it up.

Maybe the computer control has gone bad.

This is driving me NUTS!

[This message has been edited by B Frye (edited 05-12-2000).]