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Thread: Obd1

  1. #1
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    Obd1

    Can I run a OBD1 flywheel with sensor on a M4.4 ecu ?

    1996 850 T5 AWD - Self tuned M4.4 ECU with COP`s, B5254T ( S60R internals in a 850 block ) ostrich 2.0 , VXR injectors @ 3.8 bar, K24 turbo with a 6+6 compressor wheel, 3.25" MAF, top mounted Dump Valve, RN Exhaust manifold, 3" downpipe with 200 cell cat, 2.75" Stainless exhaust, Brembo calipers, S60R brake discs, stainless RIP kit, 3" Throttle body,

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    From memory it all depends on what signal the ecu is wanting to receive gav had lots of problems on 4.3 swapping a later fly wheel into his obd1 car and it wouldn't fire correctly.

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    P.s he also tried later sensors which didn't work so ide put money on it to use a later fly wheel if your running 4.4

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    I've checked the ecu info for both OBD1 & OBD2 and both have a crank sensor output of 825Hz @1.5v

    The reason I asked coz I just got hold of a OBD1 engine.

    1996 850 T5 AWD - Self tuned M4.4 ECU with COP`s, B5254T ( S60R internals in a 850 block ) ostrich 2.0 , VXR injectors @ 3.8 bar, K24 turbo with a 6+6 compressor wheel, 3.25" MAF, top mounted Dump Valve, RN Exhaust manifold, 3" downpipe with 200 cell cat, 2.75" Stainless exhaust, Brembo calipers, S60R brake discs, stainless RIP kit, 3" Throttle body,

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    That's why I said it's the ecu not the sensors

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    I think the sensors are the same, I read a Volvo tech article not long ago which states that when fitting the later flywheel the wires in the sensor connector have to be switched round (must be a polarisation issue).

    My 850 runs M4.4 and has the older flywheel (I think, it's the one with the holes in)
    Last edited by Dangerous Dave; Sunday 20th December 2015 at 22:12.
    1996 Olive Green 850 AWD - Follow the Project - Forged rods, 19T, big blue injectors, 960 TB, 3.25" MAF, Ostrich, 608 binary, arduino data display, active exhaust control with Focus RS tips, 320mm front brake conversion.
    1996 Nautic Blue 850 AWD - Failed its MOT, now it's a donor for the green thing.
    2004 Sapphire Black S60 D5 - The new daily hack.

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    Quote Originally Posted by Dangerous Dave View Post
    I think the sensors are the same, I read a Volvo tech article not long ago which states that when fitting the later flywheel the wires in the sensor connector have to be switched round (must be a polarisation issue).

    My 850 runs M4.4 and has the older flywheel (I think, it's the one with the holes in)
    Gav tried that with switching the wires but he still had intermittent starting issues and only thing to correct it was to change to the correct flywheel

  8. #8
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    Quote Originally Posted by Dangerous Dave View Post
    I think the sensors are the same, I read a Volvo tech article not long ago which states that when fitting the later flywheel the wires in the sensor connector have to be switched round (must be a polarisation issue).

    My 850 runs M4.4 and has the older flywheel (I think, it's the one with the holes in)
    The flywheel on the engine I've just picked up has holes in the out side of the flywheel and it OBD1

    While the flywheel in the 850 has slots and is using a M4.4

    1996 850 T5 AWD - Self tuned M4.4 ECU with COP`s, B5254T ( S60R internals in a 850 block ) ostrich 2.0 , VXR injectors @ 3.8 bar, K24 turbo with a 6+6 compressor wheel, 3.25" MAF, top mounted Dump Valve, RN Exhaust manifold, 3" downpipe with 200 cell cat, 2.75" Stainless exhaust, Brembo calipers, S60R brake discs, stainless RIP kit, 3" Throttle body,

  9. #9
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    Hmmm, not sure then. I don't remember reading anything about the crank sensor being an issue on the VS thread (or the m44 wikia) when converting from M4.3 to 4.4

    Here is the tech article:
    https://www.dropbox.com/s/aze843njd1...tions.pdf?dl=0
    1996 Olive Green 850 AWD - Follow the Project - Forged rods, 19T, big blue injectors, 960 TB, 3.25" MAF, Ostrich, 608 binary, arduino data display, active exhaust control with Focus RS tips, 320mm front brake conversion.
    1996 Nautic Blue 850 AWD - Failed its MOT, now it's a donor for the green thing.
    2004 Sapphire Black S60 D5 - The new daily hack.


 

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