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  1. #181
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    oblark's Avatar
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    After having the car MOT'd on monday I've keep getting the fault code of EFI-233.

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    The first 2 are not worth worrying about but the EFI-233 adaptive idle air trim is the one that is putting the lambda light on. So with a bit of research on the internet I came across this.

    "Diagnostic trouble code (DTC) information EFI-233

    Substitute value idle air trim disabled fuel shut-off conditions changed output signals to the coils are regulated with a fixed value depending on the cause of the fault leakage diagnostic is disabled. Possible source
    Signal too high: short-circuit to supply voltage in the signal cable defective idle air control (IAC) valve.
    Signal too low: opening and closing coil signal cables short-circuited to each other defective fuse 11B/2 (1998-) open-circuit in power cable short-circuit to ground in signal cable defective idle air control (IAC) valve contact resistance in terminals.
    Signal missing: open-circuit in signal cable defective idle air control (IAC) valve contact resistance in terminals.

    Fault symptom[s] idling speed low or high."

    As I'm not getting a signal to low/high or missing I'm little puzzled on what the fault could be as the IAC has been running trouble free years.

    So rooting around in the Bin I came across a RPM/throttle angle boundary for ZWD off (IAC valve) as you can see in standard form the IAC is still in use upto 3390rpm and 47.30 degrees on the throttle. So I've lowered both values to 1980rpm and 19.98 degrees on the throttle.

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    I'll upload the new values on the ECU tomorrow and see what happens.

    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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  3. #182
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    The new values for the IAC where uploaded to the ECU and the lambda light hasn't stayed off

    As I've stopped the engine knock at 15 psi so I turned the boost up a bit

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    It looks like shes running a little rich with some slight knock, 22 psi @ 3690 rpm, not bad for standard rods.

    I've adjusted the TCV load and duty cycle so the maximum boost comes in @ 4500 rpm

    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,

  4. #183
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    Did a bit more this weekend on getting the injectors dialed in.

    Brown line - requsted AFR
    Light blue line - actual AFR

    At idle
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    Driving at 40 mph
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    Well atleast now I know what to do when I set up my 750cc injectors up
    Last edited by oblark; Sunday 6th December 2015 at 21:42.

    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,

  5. #184
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    Quote Originally Posted by oblark View Post
    The new values for the IAC where uploaded to the ECU and the lambda light hasn't stayed off

    As I've stopped the engine knock at 15 psi so I turned the boost up a bit

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    It looks like shes running a little rich with some slight knock, 22 psi @ 3690 rpm, not bad for standard rods.

    I've adjusted the TCV load and duty cycle so the maximum boost comes in @ 4500 rpm
    I would'nt push the timing much further and I'd reduce the boost a bit mate, rich and knocking isn't good at low RPM. I can't read your screens though but as you know you want a nice smooth torque curve on stock rods

  6. #185
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    Quote Originally Posted by Dream3r View Post
    I would'nt push the timing much further and I'd reduce the boost a bit mate, rich and knocking isn't good at low RPM. I can't read your screens though but as you know you want a nice smooth torque curve on stock rods
    I was running the car on normal unleaded fuel, I'm now runnning on Esso super unleaded and not getting so much knock.

    Here is ignition map I'm running/tweaking at the moment

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    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,

  7. #186
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    That's quite high lol does it achieve it?

    95 octange is bad for these man I seen an R pull 15 degrees on 95 Ron lol.

    Tesco 99 rules


 

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