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No Start - Ignition Control Unit 700 1989

posted by  someone claiming to be Bill Peyton on  Sun Dec 31 04:51 CST 2000 [RELATED]

Hi Guys -

Here's the situation:

760 Turbo Wagon, 183K, drove into the garage Tuesday, never to start again.

Car cranks, tries to fire after about 10 seconds, but never really even starts to catch. WIth the list below, have to conclude something wrong with the mixture or the timing. And, the oil is certainly flooded with gas by now.

I am also getting gas kicking back into the throttle body and into the air control valve; the plugs are alwasy wet after a starting attempt.

Compression had been about 145 to 155 PSI a year ago, regular oil changes since then.

Replaced/tested: Coolant sensor, Fuel Pressure Regulator, all of the gas in the tank, coil. Car has good spark, gets fuel to the cylinders, has fairly new fuel filter, main fuel pump (which works on cranking) in tank pump, wires, cap, rotor, wires.

Time has come to start checking for inputs to the Injection Control unit.

Haynes is worthless on this point. Under the dash, above the driver's kick panel area, left hand side are three candidates:

#1 is a black unit with about 15 wires going into a heavy clamp in connector. Bosch part number is 0-261-201-012. A second bar code reads: 1346 - 469. But no vacuum line going into this unit.

#2 is a larger silver unit to the right of #1.

#3 is a smaller unit with Hella logo on it, as well as a Volvo logo. Ten wires going into it. Probably a fog light relay but... looks to be Volvo part number 3501472, a second number reads, 5GA 004 872 00.

Thoughts on which candidate of the ICU? And on this mystery of science?

Thanks in advance.

Bill Peyton





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