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  1. #11
    Off the Xmas card list kapri's Avatar
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    Quote Originally Posted by v8ian View Post
    Are/were they all autos, bigger cam making less vacuum and the loss of Vacuum with the auto playing havoc with the MAP sensor, causing timing issues and fuelling problems. or being injection, there is an engine management fault, Possibly Lambda, and going into limp mode?? Pure speculation BTW.
    Yup all autos .However the cam is a an engine specific auto/towing cam. Lots of lift but little difference in timing to standard. No Map sensor , AFM on early Bosch system. Also early open loop so no lambda sensor. I belive this system also doesn't have a limp home mode as it isn't a 'learning type ecu and has no KAM set up (VERY early EECiv)

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  3. #12
    Off the Xmas card list kapri's Avatar
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    Quote Originally Posted by chaley View Post
    I'm with Ian on this, have you tried another ecu? Could be as little as a dropped sender?

    Chaley
    I have code checked it and even though nothing has shown I've also replaced all senders ...TWICE

    I do have a spare ECU which I will try but there's nothing showing to say thee may be a fault because it appears to be adding timing as it responds to TPS and AFM

  4. #13
    Off the Xmas card list kapri's Avatar
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    Quote Originally Posted by Mad Mark View Post
    In comparison, the A has the aerodynamics of..........er..................a.......um........ ..................house brick!!
    Brick****house I believe the correct term Mark My old Rover powered A was similar, apart from the chop , and you could feel it struggling at around 90 on a private test track. Still manage to 30mpg and a hell of a lot more performance from that

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  6. #14
    Off the Xmas card list kapri's Avatar
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    Quote Originally Posted by cptpugwash View Post
    maybe the cam doesnt work as well with the 4 speed as your previous 3 speeds
    think the pointer is in the cruise reading....think it should be quiet high then
    maybe cam timing still, maybe that cam doesnt work as well with the comp ratio
    burnt out valve perhaps, vac advance not working
    just stabs in the dark im affraid
    Cheers Kev , checked cam timing with dti etc and all correct to spec and also cam checked as being what it should be re lift and timing ( already had one in there that wasn't ) So cam checked by manufacturer and myself.

    No vac advance on this as all worked out by ECU based on sender inputs. Engine was only 50k from new, valves all reseated before installation and no sign of valve leaks via hg readings.

  7. #15
    Off the Xmas card list kapri's Avatar
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    Quote Originally Posted by Smokey View Post
    Hi Kev
    it could be either O2 or knock sensor if fitted ? If you can't check the
    diagnostic obd codes check the knock sensor voltage values
    No o2 or knock sensors, real basic std injection set up. Codes showing no faults found which is why I'm looking at the physical issues that the ECU doesn't understand.

  8. #16
    Rods 'n' Sods Junkie
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    I don't think their is a problem with the ECU
    The engine is over fueling
    The only change was the the exhaust!

  9. #17
    Off the Xmas card list kapri's Avatar
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    Quote Originally Posted by Perfect65 View Post
    "Bloody Obvious" but if the engine is as it was before - could there be a running gear issue - assume you've checked brakes binding or a drive train tight spot? These could explain a low vac when driving but as for anything engine side all those sensors and valves are not on my planet.
    Thanks also Nope, all drive train good same with brakes, all brand new and checked again for drag etc. Bloody obvious is NOT being ruled out

  10. #18
    Off the Xmas card list kapri's Avatar
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    Quote Originally Posted by Smokey View Post
    I don't think their is a problem with the ECU
    The engine is over fueling
    The only change was the the exhaust!
    I like your way of thinking , especially like the idea of the knock resonance ...that isn't it as it doesn't have one but it's that sort of offbeat thinki8ng that MAY come up with the answer. There is definitely more resonance than a cast iron manifold.

    I've checked mixtures with a cheap 02 gauge and the lpg is spot on through the range. However you've made me think about borrowing my mates Gunson spark plug tune for a closer internal look I'll also recheck compressions while I'm messing around they WERE all fine but never a problem to recheck.

  11. #19
    Official RnS Addict bigyellataxi's Avatar
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    Fuel leak somewhere???

    As for all the acronims I have no idea (ODB and all that ****e)

    Fueled by Jim and Luckies.
    Still doing all the shit I used to ;-)

  12. #20
    Off the Xmas card list kapri's Avatar
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    Quote Originally Posted by bigyellataxi View Post
    Fuel leak somewhere???

    As for all the acronims I have no idea (ODB and all that ****e)
    The only acronym worth remembering is MFI , and that will tie up all modern systems into one understandable operation. More ****ing Inconvenience.

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