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P80 distress signal .-..-.-.--.---.

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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abscate
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Year and Model: 99: V70s S70s,05 V70
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Re: P80 distress signal .-..-.-.--.---.

Post by abscate »

That clutch switch inhibits cranking but not starting on a 1999, but I don’t think it even does this on earlier -1998 Motronic 4,4

Mine went on my 1999 and I could push start it.

Fuel pressure regulation changed over the years. Is it firing on ether? Quick way to diagnose spark vs spark/ fuel problem
Empty Nester
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1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 XC90-in-Red
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Chuck W
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Post by Chuck W »

You've missed a connection somewhere. You say you have spark, and fuel at the rail, but have you verified that the injectors are firing? I'm guessing not.

Seeing as you can't communicate with the ECU through the OBDII port, and you haven't mucked with the body-side harness, the ECU is probably not getting power.

I'll ask again if you have checked the main EFI relay that is mounted on the fan shroud? The connectors are for crap and I've had them get knocked loose. This will cause the car to crank but not fire. Does the relay click when attempting to start the car.
'97 854 T5 - Manual Swap/M4.4/COP/NA cams/P2R Brakes/16T/ chassis bracing/ XC70 nose swap
'97 855 GLT - Hers. RN swap/16T/COP/VVT/exhaust/302s/Flashed M4.4/ chassis bracing/ 2 kid seats
'78 GLE - Waiting in the wings. Future whiteblock/T5 swap.

The Others- '83 TBird turbo, '85 Mercury Marquis LTS (1 of 134), '86 LTD Wagon, '81 Granada GL, '76 Beetle, '93 F-150 I6

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