Question about 1994 Volvo 850

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I have a 1994volvo 850 turbo. This car Mostly Doesent Start. The Coil Is Not Fireing. Upon Checking Their is no Triggering Signal at the Igniter.The car Must Have a Crankshaft Signal as when cranking the Fuel Pump comes Back on And The RPM Guage Moves To about 50 Rs. Their Is A B plus Sig To the Igniter And A B Minus the center wir4e on t5he igniter has continuity to the Ign ECU. Also When The Battery Is almost Zilch the car tries to start.

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Check or replace the cam sensor, this sensor sense the turning of the cranksaft by sending info to ECU telling ecu to tell the coil to disperse the sparks. is the cam sensor is faulty than you will not get any fire/sparks from the coil assuming the coil, wires and plugs are good. crank sensor does the same but turn on the fuel pump. hope that help some

Posted on Oct 03, 2009

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Posted on Jan 02, 2017

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I have a 1996 volvo 850 turbo my fan #1 ra don't work so i have to used #2 fan that the ac fan with blow motor on hi to keep it from over heating.


are you getting power to the fan? could be a weak fan motor. I would start by checking Fuse then relay the check the temp sensor the fan don't use the same sensor as the temp gauge.

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51332cba-000f-4a70-9447-012c9c8d6f42.jpg

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Did you replace hoses to eliminate the codes?? Try checking all the fuses for a start then check for any ignition sparks then try to listen to the fuel pump activation on IGN and STRT as well just try to go step by step and eliinate the different components as you go. Good luck.

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1 Answer

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are you saying that you have 12 volts to the coil but no spark out/if this is the case first make sure the cam is turning by looking in the oil cap hole,next yes the cam sensor is a common failed part and can cause the problem, you also have the crank sensor just below that and it would not hurt to replace also

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