buying used 86 760 turbo wagon

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buying used 86 760 turbo wagon[ALL/1998] posted by chris nelson on
Tuesday, 30 September 1997, at 1:45 p.m.

am going tonight to test drive 86 760 gl wagon for $2995. does that sound reasonable? will be used as daily driver for wife, has 139,000 miles. will be first turbo, what should i look out for. what if no service records? please answer ASAP

Re: buying used 86 760 turbo wagon[ALL/1998] posted by Duane on
Tuesday, 30 September 1997, at 9:17 p.m.

You might want to ask about any previous or current no start conditions this vehiclew has had. I found the following information the other day while surfing and saved it for an occasion such as now.
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1) 1984 to 1989 740/760 turbo models with Bosch Motronic part numbers
0261 200 022 and 0261 200 026. Symptoms... problems usually begin with
intermittant on road breakdown or failure to start (no injector pulses
or injectors operating continuously). Usual diagnosis is Motronic ECU
failure which is replaced but problems continue.

More likely cause on these vehicles is failure of Luxor injection
amplifier (rectangular black cast alloy box located immediately behind
battery with connector uppermost. This box is part of traction control
system and is fitted to all these vehicles whether or not traction
control is specified. Failure is due to PCB design and quality control
shortcomings. This can usually be rectified by CES reconditioning of
Luxor box.

2) 1988 to 1992 740 and 740 GLE with Bosch Jetronic LH 2.4 fuel
injection ECUs part numbers 0280 000 590/591/594/595. Symptoms...No
prior warning, car usually breaks down on road or fails to start when
warm (loss of fuel pump control). Diagnosis of ECU failure usually
correct.

Cause of problem is failure of Bosch special hybrid circuit possibly due
to overheating. Providing ECU retains all other functions (car runs OK
with fuel pump relay jumper) this problem can be rectified by fitting
CES fuel pump control circuit inside ECU.
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Hope this helps and doesn't confuse.

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