Power Outputs for S1 Mi16 & idling problems
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  1. #1
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    Icon5 Power Outputs for S1 Mi16 & idling problems

    Hi there,

    This is a two part question.

    The first is that i'm going to get my S1 Mi16 run on the dyno to see what power she's putting out, partly out of curiosity, and partly to see if anything can be related to the problem in the second question. Has anyone done this as factory standard, and what power figures did you get?

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    Also, she still seems to be running rough at idle. I've replaced the injectors, leads, plugs and had it tuned, it was running lean, but to no avail. The engine mounts are fine also. I posted a thread on this a while ago before i got the new injectors but this didn't improve it. I also swapped the air flow meter for a different one to see if that worked but again, no improvement.

    I'm at a loss to what it is. It's almost like a small misfire and it happens every second or so when idling, and you can hear it coughing and spluttering out the exhaust. It revs cleanly and very smoothly.

    If anyone has any suggestions of where to look it would certainly relieve my headache!

    Cheers

    Alex

  2. #2
    1000+ Posts PeterT's Avatar
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    Figures will differ from dyno to dyno, but you should see 75-80 kW at the wheels. Try the same as Ky went to, Autotech Services. Do a search and you'll find Ky's dyno sheets on here.

    It could be an exhaust valve not seating properly. A compression check might help.

    Here's a before and after when Ky upgraded to my Stage I inlet cam.
    Attached Thumbnails Attached Thumbnails Power Outputs for S1 Mi16 & idling problems-stage1_cam.jpg  
    Last edited by PeterT; 15th November 2005 at 08:03 PM.

    '92 205 Mi16
    '90 Mi16x4

  3. #3
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    Thanks Peter,

    Hadn't thought of a compression test, i'll see what happens with that.

    With the dyno sheet, i take it that the sharply increasing line is the power curve, but what is the other line?

    Cheers

    Alex

  4. #4
    1000+ Posts PeterT's Avatar
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    black - std. inlet cam power and AFR
    red - stage 1 inlet cam power and AFR

    '92 205 Mi16
    '90 Mi16x4

  5. #5
    Fellow Frogger! JAG80's Avatar
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    My car had a similar symptom and it was a shagged coil. Wouldn't hurt to check the resistances at the coil terminals. It was easy to diagnose on mine because the coil was arcing out between the base of the connector on the LT side and the mounting bracket It now idles nicely and has much stronger spark
    Blood Orange 2006 Renault Megane Sport Cup
    Silver 1989 Peugeot 405 Mi16
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  6. #6
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    Vacuum leak ??? possibly around inlet manifold somewhere. My 2c's

    cheers JR
    jr20516v

    Now:
    Exige SC [modded], 205 Si. 205 GTi , Megane R26 LY , Megane 225 [modded ]


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