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Thread: starting probems

  1. #1
    Guest mospin's Avatar
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    starting probems

    im having problems with me ca its really hard to start and worse in the cold in order to start it I have to remove the fuel pump fuse and quickly put it back in so far ive done.

    timing checked 3 times
    change the csv
    change ecu
    plugs
    oil

    ive yet to change the temp sensors wondering if theres anything else I can try or its a case off worn valves

    once its started and warmed up it starts everytime.

    mods are

    fmic
    topmount with t04b
    stage 2 ecu
    walbro
    external wastegate
    airfilter
    stage 6 I think plugs the colder ones
    straight throu exhaust

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    Does it smell of fuel

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    Guest mospin's Avatar
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    Sometimes it does around the engine bay without even starting it but can never pin point it

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    iss your turbo ok with a stage 2 chip? could be overfuelling. or a subtle boost leak?

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    yer its fine with stage 2 bit laggy but ok no boost leaks everything is new pipes , joiners and lines all fine

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    I would do a compression check first.

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    Guest mospin's Avatar
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    okay il see if I can get hold off one

  8. #8
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    coldstart

    p1 90psi
    p2 95psi
    p3 90psi
    p4 105 psi


    hot start

    p1 97psi
    p2 95psi
    p3 105psi
    p4 102psi

    what does the results mean

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    Need to do a dry test then a wet test.. Will either be rings or valves..

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    Quote Originally Posted by mospin View Post
    coldstart

    p1 90psi
    p2 95psi
    p3 90psi
    p4 105 psi


    hot start

    p1 97psi
    p2 95psi
    p3 105psi
    p4 102psi

    what does the results mean
    Thats is quite low, think results are normally 125psi+ on each one, i'll wait to be corrected though

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    Did you hold the throttle fully open?

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    very low if the throttle was open like skyshack says. had the same issue with my s13, was int inlet valves in the end

  13. #13
    Guest mospin's Avatar
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    no just had coilpacks disconnected and turned the key to get the results done the same on a mates car and that was hitting 130

    what is a dry and wet test?

    oh and the car drives very smoothly other than the slight mis-fire and constantly over fueling just a pain to start first thing
    Last edited by mospin; 28-05-2015 at 19:58.

  14. #14
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    Do it again. This time press the throttle to the floor and count to 7-8.

    Wet test is done if dry comp test gives low results. Put a few cc (2-3) of oil down the bore, spin motor to distribute the oil to the rings, then test. If comp improves its rings. If it doesn't then its gasket or valves.

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    Guest mospin's Avatar
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    ok got it il give it another go and report back

  16. #16
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    dry test

    110
    100
    125
    120


    wet test

    185
    165
    215
    170

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    piston rings....215psi seems strangely high..

  18. #18
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    so im guessing the rings are fried

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    As loopy says, looks like you need piston rings.

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    fun times...
    Last edited by mospin; 31-05-2015 at 22:06.

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