OK so I didn't fix the problem on my turbo wagon. Give the car some throttle and it sputters, sometimes it will just die, wait a few minutes and starts back up but still sputters when given any throttle. The intank pump and sock have been changed, fuel filter, coil, ignition wires, spark plugs, o2 sensor and most vacuum hoses. I am thinking either the main fuel pump or fuel brain. A co-worker suggested that the cat is bad.....what do you think? Thanks

Doug

"...or fuel brain...."

A 240 turbo? What "fuel brain?" The 240 turbo uses the K-jet "mechanical" FI system.

"...co-worker suggested that the cat is bad..."

I had a bad cat on my '82 245 turbo when I bought it (it's the reason I could buy it...).

The symptom was no power above idle. Your description of the symptom could be a bad cat, though it's a stretch.....

You'll find a threaded plug in the exhaust pipe 'tween the turbo and cat. Remove this plug (yes, I know it's louder than hell...) and see if the performance slightly improves. If so, then you might indeed have a plugged cat.

In my case, the feeling was that the engine was severely choked or constipated. I would not characterize the problem as "stumbling" or "sputtering."
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Don Foster (near Cape Cod, MA)

You are right no fuel brain, this is the first B21FT that I have owned so I don't know too much about it; have had the car for about a month.
I pulled the plug and it still runs the same. Thanks for the input, any other suggestions? I would like to check fuel pressure but don't have a gauge, anyone know where to buy one that would work on this setup?

Thanks

Doug

With K-jet, if the main pump's misbehaving significantly it will upset the mixture. Ironically, slightly low pressure will cause a rich mixture, and slightly high pressure will cause it to run lean.

A dirty or failing control pressure regulator (cpr) can also cause mixture problems -- and is more likely than a misbehaving fuel pump. The cpr's different from the fuel pressure regulator, which is in the fuel distributor. The cpr controls the fuel pressure during a cold start and warm-up.

You can assess the system pressure, control pressure, and rest pressure using the appropriate fuel pressure test gauge setup, which is designed specifically for this. It attaches to the cpr. I believe Harbor Freight sells a gauge set that either fits directly or can be easily adapted. The "official" Bosch or Volvo gauge set is expensive (what a surprise!).

Also check the connections at the frequency valve and its relay.

Be sure the throttle and throttle switch are properly adjusted. The switch MUST click when the throttle returns to idle -- it controls the idle speed system.
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Don Foster (near Cape Cod, MA)