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Engine cut off 200 1989

posted by  David Samuels on  Mon Jan 29 08:47 CST 2007
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last visit: Mon Oct 20 12:23 CST 2014
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Here's a new one to chomp on Bricksters. '89 240. Running perfectly when parked a few months ago. Battery weak, jump started two or three times for movement, ran fine. Finally ready to bring it back to life, started fine, idles fine, but at about 2k RPM (maybe a little less) the engine cuts out completely (at idle or driving). As soon as it drops slightly it comes back to life. Like someone flicking an on/off switch. Diagnostic gives me 2-2-3 code in the #2 socket and 2-3-4 in the #6 socket, indicating IAV system signal problems. Switch and air valve are good though, and even give the correct diagnostic signals. What could suddenly cause this with no other changes? Coil is good, wires fine. Fuse holder good. Both pumps running, no weeping at the fuel pressure regulator. Warm or cold no difference. Any thoughts will be appreciated. ECU maybe? Somehow damaged by the jump start?

Thx,

DS






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