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Turbo charge air overpressure switch 700 1989

uid 55's pic
posted by  john sargent on  Tue Mar 8 16:58 CST 2016
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last visit: Wed Oct 22 09:07 CST 2014
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For LH 2.2 the overboost switch shuts off the fuel injection relay. The switch is mounted near/on the EZK on 740s and 1984-87 760s. The switch is near the coolant reservoir on 1988-89 760s. The Turbo+ kits came with a switch with a higher pressure setting. You can dig out the potting over the adjustment screw and turn up the pressure setting.

It shouldn't be necessary to shut the engine off to get your car to run right. As soon as the boost level drops, the switch closes and the fuel pump relay closes the the FI works.

I've riden a Garrett T3 equipped 740T which had a broken hose to the wastegate controller. The car would generate a lot of boost. The engine would die and restart when the boost level dropped. If you left your foot on the gas, the car would really buck, as the FI would shut down, and then restart.
--
john






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New 1 Turbo charge air overpressure switch [700][1989]
posted by  Brick Skinner  on Mon Mar 7 10:44 CST 2016 >


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