What are the symptoms of timing belt jumped a tooth or two?

Posted by dawid4444, Jul 27, 2010
Maintenance & Repairs - Oil choices, timing belt, setting timing, CV boot replacement, alternator servicing, fuse/relay checks, and other basic maintenance, repair and diagnosis discussions.

  1. dawid4444

    dawid4444 Proven Member

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    hey guys i would like to know what are the symptoms of timing belt jumped ??

    what is happening to the car if its jump ??
    how to chceck if it jump ?


    btw my car loosed like 40% of power and i need to chceck my timing belt if its ok


    thx a lot guys
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  2. gofer

    gofer Moderator

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    Symptoms of a timing belt that has jumped/skipped a few teeth:
    • One Tooth: It will idle like normal and the exhaust will sound fine but cruise and WOT the car will feel like you've got no power and in most cases will hesitate and misfire.
    • Two Teeth: It will sound like somethings "knocking" which is likely the pistons kissing the valves. The car will start and idle but if it sounds like somethings knocking just because it starts DON'T DRIVE IT!
    • Three Teeth: Your bending valves, the car more than likely won't start, & you'll have ZERO compression.

    To check it you need to align the timing marks on your cam gears, follow this write-up and take pictures of your results if your unsure.
    1G/2G Quick Timing Belt Alignment Check

    :dsm:
    #2
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  3. DSM1G90

    DSM1G90 Supporting Member

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    Lost 40% of power also sounds like your charging system has taken a dump. Not enough current heading to the coils to fire the plugs hot ... I've seen that as well ...

    Pull a plug and see if it's all sooty or clean. If it's sooty and all plugged with carbon, that plug is firing real weak.
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  4. dawid4444

    dawid4444 Proven Member

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    maybe not 40% its like 25% or 30%

    i looked an the plugs and all of them are super white . i think it means that itss too hot ??

    and thanks too gofer for fast replay and good explanation :D

    ill chceck timing today later

    thnksss again :D


    whatt else could it be ???

    when i go WOT sometime it feels like the turbo has shaft play but the turbo is new and it has no shaft play at all

    some sensors ?? or it could be that timing belt off ??
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  5. gofer

    gofer Moderator

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    If you verify that everything on the timing belt side of the motor lines up you need to do a boost leak test (BLT) and if you don't know how to do one there are BLT threads all over tuners and vfaq... Is the CEL illuminated?

    :dsm:
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  6. dawid4444

    dawid4444 Proven Member

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    yeahh i know how to do a boost leak test . i know a lot about turbo cars .
    and yes i did a boost leak test and find that my bov is leaking but it was leaking when the car was pulling HADR so :/
    and another leak is on 4th injetcor seal
    ill change them soon

    the CEL was on ( P0300 ) i clear it and it is good but it always come on on the highway at about 70mph
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  7. gofer

    gofer Moderator

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    It might be your COP setup or if your running a 1g CAS you can get the P0300 CEL randomly as well.

    :dsm:
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  8. dawid4444

    dawid4444 Proven Member

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    ok i check the timming belt yesterday and my first guess was that my timming is off one Tooth cause i aligned the camshaft and than look at Crankshaft pully timing mark and one time ot was at 5 BTDC and i try to fixed it . I turn the timming belt back a Tooth and lookk again . guess what ?? Crankshaft pully timing mark was not even at the ''T - 15 BTDC '' scale anymore :/ so i guess my timming is ok .
    its like bettewn 5 BTDC and T mark . it is like 3 BTDC.

    what do u guys think >> ??

    btw when i was checking the timming i clean up the crank angle sensor cause it was flood in oil and idk why :/
    and the car seem to run a lot better now
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  9. gofer

    gofer Moderator

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    Not sure if you've got a camera or a camera phone handy but you trying to explain what you saw with your timing marks is a bit confusing. Just take two pictures, one of your cam gears and one of your crank pulley and where its line up to TDC. It should only take 6 turns or less to get everything to line up like it should.

    If your CPS (crank position sensor) was covered in oil you might be leaking oil from your OEM CAMSHAFT OIL SEAL : MITSUBISHI ECLIPSE 90-99.

    As an example, heres what mine looked like when I skipped (2) teeth a few years back...
    [​IMG]

    [​IMG]

    :dsm:
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  10. dawid4444

    dawid4444 Proven Member

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    Here are some pics i took .

    like i said the mark on Crankshaft pully is at like 3 BTDC
    what do you guys think ??

    sorry for my english but im come here not long ago

    thxx guys

    Attached Files:

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  11. gofer

    gofer Moderator

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    Thanks for the pics and you don't have to apologize for your English, I'm not bilingual and I'm sure English is your second language so your doing better than I am.

    Your timing looks good, hows the car feel now after you fixed that #4 injector seal? That P0300 random misfire code could be coming up because of your COP setup, you might try reverting back to stock if you can and see if it clears up.

    Thanks for the pictures, it really helps.

    :dsm:
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  12. dawid4444

    dawid4444 Proven Member

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    i didnt change those seals yet . I will do it tommorow or tuesday .

    and with that P0300 code i will try to find some good cheap coil pack and see if the code come back

    --one more question

    why the car sometime feels like the turbo has a lot of shaft play ??
    the turbo is new and it doesnt has any shaft play at all .

    its like when i drive in 2nd gear at 2.500 rpm and than go WOT the turbo will boost fine but the car wont have power :/ if i let the gas off and than WOT again its all better

    what do you guys think ??

    thkns a lott
    :D
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  13. Bluedragondsm

    Bluedragondsm Proven Member

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    Sounds like a boost leak, if the turbo is boosting fine but you aren't feeling the power then air isn't making it to the cylinder most likely. That or fuel isn't but then you would know because you would be running super lean.
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  14. dawid4444

    dawid4444 Proven Member

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    but when i let the gas off and than WOT again its all okay

    and i dont have a Wideband so i can check if its lean :/
    u said fuel ? what exacly could be couse this >??
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  15. Bluedragondsm

    Bluedragondsm Proven Member

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    When you say you go WOT it does what? does it bog? does it just not feel like its boosting?
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  16. dawid4444

    dawid4444 Proven Member

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    yeahh if it does that it bogs a lil
    Last edited by a moderator: Sep 5, 2010
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  17. dawid4444

    dawid4444 Proven Member

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    if i turn up the boost its getting worse
    Last edited by a moderator: Sep 5, 2010
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  18. Colt4G63 also

    Colt4G63 also Proven Member

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    The P0300 indicates a random missfire IIRC, and our cars are tough on plugs and wires. Are you sure it's not just a missfire. Does it feel a little rough/shaky when it's happening?
    #18
  19. chrisff521

    chrisff521 Proven Member

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    My car jumped timing the other day because I have thesee same symtoms like loss of power and stuff after last week when I was doing something in the engine bay and accidentally left a screwdriver near the cam gear and I guess it was a little in it but I went to start the car to test and it got jammed but I immediatley shut the car off. How can I adjust the timing.
    #19

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