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Turbo - Too Much Boost Problems 700 1987

posted by  Wicked Pete on  Sat Apr 17 17:17 CST 2004
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last visit: Sun Apr 3 06:33 CST 2011
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I replaced the heater & radiator hoses today on my daughter's 740 turbo and headed into the mountains to check the cooling system(we live in Denver, Co.). As I started to pull the hills the turbo would quickly overboost and the turbo gauge would push far into the yellow. I found just tiny changes in pedal pressure would cause the turbo gauge to rapidly climb. If I let it go the needle would point straight down and the motor would start to cut out.

The car is an 87 740 Turbo with 130,000 miles w/Automatic.

I'm a pretty good wrench but I don't know much about Volvo turbos. Where do I start in diagnosing this? Is this indicative of a waste gate issue or something else?

Thanks in advance for your help.

Pete






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New Turbo - Too Much Boost Problems [700][1987]
posted by  Wicked Pete  on Sat Apr 17 17:17 CST 2004 >


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