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740 Turbo has no boost 700 1989

posted by  pmarasco on  Tue Jul 30 14:24 CST 2002
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OK - My 740 turbo had just made a great run down the on-ramp. I opened the throttle up a little to get up a hill and noticed something wrong. I could not get any boost. The car runs fine(i.e. no smoke & no drama, just no boost)and revs great. I did read the FAQ's. I checked for:

1. split hoses (which were just all replaced in January),

2. broken CBV (plugged it and got no boost)

3. took off the Dawes device (just in case)

4. Turbo does spin freely

The other things to check for in the FAQ were:

Faulty Wastegate or controller (how do I check that for this year?)
Plugged cat (can a car go 65 mph at 4500rpm with a plugged cat?)

I of course have the usual little funds and would like to fix it myself.


Thanks to all who reply.
Phil






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