My recent restoration turbo 240 glt wagon is on the road and running, however it failed inspection due too emissions. It was way off the board because of high levels of CO. I'm getting horrible mileage (8 mpg) and my fuel pump is buzzing (brand new). Do I just need to turn down the richness from the fuel distributor or is it a combination of things? Brand O2 sensor too, also replaced fuel distrubutor, and cleaned and tested fuel pressure regulator. All vacuum lines replaced as well and a brand new exhaust w/used caty. Please help.

David L.

Excellent advice from Matt and Paul.

In addition, check out the cold start injector. Could be leaking when the engine is warm.

Good Luck,
MORMIT
1985 245DL 230,000mi "Inga"
2002 S40 2,200mi "Sigfreid"

I just had this exact same problem in my '87. I needed a new fuel pressure regulator. Symtoms are everything you describe... high CO, poor gas milage, and buzzing fuel pump (because it's working way too hard). I ordered mine from fcpgroton, it was something like $35 (Bosch).

How did you test your regulator? If you disconnect the return line, gas should be pouring out when the car is idling. I connected a hose from the return side of the regulator and ran it into a jug to diagnose mine. Little or no gas ever came out.

BTW if you keep driving your car in this condition you risk plugging up your new (used) catalyst.

I dunno, seems like you've done "lotsa things" yet your car is running way rich. Rather than step through "how to troubleshoot a B21FT" I suggest you get out your Bentley manual and make sure all systems are set at nominal.

You replaced the fuel distributor? Why? Also, there is no way you could have done this without dialing in the mixture, shimming the fuel pressure return "jet", etc.

Running that rich it will be no time before you kill your cat.

What is the duty cycle?

Are any of the enrichment circuits stuck "on"?

Fuel pumps can be noisy, how is the intank pump?

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www.fidalgo.net/~brook4