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Thread: Air intake affecting CR2 unit??

  1. #1
    Administrator plasma's Avatar
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    Default Air intake affecting CR2 unit??

    Just got home form work.. Doors and frames were ordered wrong so couldnt fit them. Anyway i turned the CR2 unit up a tad expecting it to overfuel like before when in 3rd gear and hitting 4.5k revs or so but it went all the way up without any problems. Turned the CR2 unit up a tad more and its still fine.

    During the week at moderate settings was ok, but turning it up cause the ECU to throw a wobbly and had uneven idling and even died on me twice.

    Now the question is. Because its raining and the air is colder today is that affecting the unit by the air being colder??

    Also i heard someone on here returned their CR2 unit for a 2nd mapping. Is that engine running standard 1.9CDTi or has it got air intake mods?

    Comments welcome please.

  2. #2
    Ex Vec-C Admin & Founder Bainie's Avatar
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    There is a theory that the ecu is intelligent (dunno if I have bought that one though?) and learns driving styles etc. Maybe yours has adjusted the air to compensate and you can tweak it a little at a time ?

  3. #3
    Regular Member nutron's Avatar
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    I have had a Tunit and two versions of the CR2.

    The Tunit used to cause problems above level 5 (0-9 available) as standard but when I used a cone filter or a modified airbox so it could get more air, it would work fine upto level 9. So the air density could well be responsible.

    Also with the CR2, I tried the red Viper version; it had alot less torque and cause a warning light to come on at high revs as you said. So I stuck with my old style box which has jumpers in it for me to adjust fueling beyond their max map setting. This gave has proved very usefull since the remap because I can still use it without having to send it back to have new map put it by just turning it down a bit (moving the jumper).

  4. #4
    Administrator plasma's Avatar
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    2 ways I can proceed from here then. Go like armoured farmer with a Ram Air Induction kit or a K&N panel filter in stock box, but with the extra cold air feed fed from the front grill.

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    Regular Member nutron's Avatar
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    The K&N is not worth it, no tuner I have spoken to has had anything good to say about them on the CDTI. 888 don't use cones or cotton filters either, they just change the paper one more often.

    Just mod your box and change you filter every six months.

  6. #6
    Regular Member nutron's Avatar
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    P.S. I have a K&N panel filter for it and it didn't give any improvement, so it's now sitting in a box. One more thing, the oil from cotton filters can ****** up the mass air flow meter.

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    Administrator plasma's Avatar
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    One box mod coming up then. Halfrauds to source the parts then. Maybe i could get black plastic flexible ducting, rather than the silver stuff. *Added* to list of stuff in pipeline to do for car then.

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    Regular Member nutron's Avatar
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    I put a details, including pics of my mod in the Tuning section

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    Administrator plasma's Avatar
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    Yep Yep i know, was browsing through there earlier on matey. Thus me saying i'd rather try to get a black flexible ducting tube.

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    Regular Member nutron's Avatar
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    The bigest limitation I had was the gap under the light, 45mm is the absolute max that will fit.

    You could get some silicone hosing small enough.

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