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  1. Join Date
    Aug 2012
    Posts
    61
    #1
    Good day to all,

    I have a project car (4k Carb converted - 4g15 engine) that stall unexpectedly especially when AC is on (not a night-time when it's cool) but sometimes even in the day it may or not stall, nag stall siya mostly sa stop and go traffic but recently sa rektahang takbo. I have done radiator overhaul, cleaned the gas tank, new fuel lines and tubes under the car, new 4k carb, new fuel filters, regular change oil every 5k km as well as oil filters. Battery is at 12.95v not running and 14v+ when running.

    New temp sender na rin pero my temp gauge seem busted kasi below 1/4 ng gauge okay ang takbo ko at pag aabot ng mag half dun ako nag-stall before. Now that radiator is leak free, less 1/4 gauge ko so malamig naman kotse pero nag-stall pa rin. And I notice na masyado mainit pa rin ang makina at radiator hoses seem to be bloated at ma-pressure di gaano mapiga at mahawakan dahil sa init.

    I have installed new ignition coil, spark plugs are 5,000+ KM old NGK brand and my mechanic said it's still Okay pa naman.

    I also found out that the high tension wire running from the coil to the distributor is brittle already so I have installed new set.

    Before I installed it the HT wire is very hot so I thought it has something to do w/ the heat loosing electricity. But even after installing the new HT wire it stalled (one time), I'm not sure if it's the heating HT wire (hindi mahawakan) even it's new kaya nag-stall engine or dahil mukhang maluwag since medyo hindi pasok yun mga boots nya sa distributor at coil so what I did is pushed the wire itself further para magshoot sa mga holes saka tinulak ang boots to cover.

    The ignition coil is very hot din even after 10 mins above drive in the afternoon, hindi mahawakan at nakakapaso ang init.

    It's hard to tell if the engine is overheating kaya nag-stall because the temp at 1/4 nag stall pa rin.

    I noticed sparkly sa water ng radiator na parang glitters, I think this is scraped na bakal so I'm planning to change my water pump even though na pag nag rev ako ay nababa naman tubig or may activity naman ang tubig sa radiator pag idle.

    My mechanic said it's the cylinder head that needs resurfacing. I need second opinion sa inyo guys if the water pump didn't work out. I don't see oil naman sa tubig so hindi head gasket.

    TIA

  2. Join Date
    Mar 2008
    Posts
    52,519
    #2
    gosh...
    i haven't felt an ignition coil in a long time. but i do remember that it does get hot, but not scalding hot. and the hi tension cables shouldn't get really that hot..
    my guess, is your ignition coil. if you can borrow a good one and temporarily exchange it..
    btw, where did you get that brand, spankin' new 4K carburator? magkano po?

  3. Join Date
    Aug 2012
    Posts
    61
    #3
    Brand new na rin po Korea orig ang Ignition Coil. (1,300 php)
    New 4k Carb (Cavite, Imus Autoshops) at (2,500 php)

    Yun HT wires ay mainit lang sa part around spark plugs, since below it is the exhaust manifold at bumubuga ang radiator fan. Pero middle to distributor, tolerable ang init.

  4. Join Date
    Aug 2012
    Posts
    61
    #4
    Anyone guys?

  5. Join Date
    Jul 2011
    Posts
    1,711
    #5
    long life coolant ba gamit mo sa radiator or tap water? opinion ko meron kang bara sa radiator.

  6. Join Date
    Aug 2013
    Posts
    184
    #6
    I think ignition coil ang culprit...try mo use one na normally gamit sa the same engine, kahit old na...nagkaroon ako ganiyan experience sa owner type jeep ko noon, new ignition coil, Delco pa ang brand, original, defective pala.

  7. Join Date
    Aug 2012
    Posts
    61
    #7
    Quote Originally Posted by johnjoseph View Post
    I think ignition coil ang culprit...try mo use one na normally gamit sa the same engine, kahit old na...nagkaroon ako ganiyan experience sa owner type jeep ko noon, new ignition coil, Delco pa ang brand, original, defective pala.
    Wala na yun dati, nabali ko yung positive pole kaya napabili ako at kahit yun dati ganun din ang problem ko. Nakabili ako ng very same ignition coil pero old stock na kasi nagiisa na lang daw, 1,300 ang price. Try ko yun tig-400 na Circuit brand muna if tumirik ulit ako after change HT wire. So far after securing contacts di pa ako tumirik.

  8. Join Date
    Aug 2012
    Posts
    61
    #8
    Quote Originally Posted by Manilablock View Post
    long life coolant ba gamit mo sa radiator or tap water? opinion ko meron kang bara sa radiator.
    Purified water as the moment kasi natapon na yun Halvoline coolant ko nun nag pa overhaul ako ng radiator (2 liters ready mix na coolant at 3.2 liters na wilkins). I'm planning to bypass the heater core muna today kasi may napapansin akong pawis sa floor mat ko sa front passenger side pero tuyo naman carpet sa floor. I have two floor mat kasi, yun luma nasa ilalim at yun medyo bago bago nasa ibabaw at yun ang nagpapawis. Suspetya ko baka may leak sa heater core kaya nagpapawis. Kasi pansin ko medyo nagbabawas ang reservoir ko kahit wala pang isang linggo na simula magpatch mga leaks sa radiator.

    Then I already bought new water pump, di ko nga lang na-iinstall pa. After that saka ako mag lagay ng Peak ethylene glycol 50/50 mix at ready na rin ang distilled water ko. Ayaw ko pa kasi maglagay dahil matatapon na naman kung maglagay agad ako habang magpalit ako ng water pump at bypassing heater ko.

    So far today, di naman tumaas temp ko or dahil it's not sunny today. Malalaman ko bukas sana tirik araw para matesting.

  9. Join Date
    Mar 2008
    Posts
    52,519
    #9
    Quote Originally Posted by mongobread View Post
    Anyone guys?
    it's been a looong time.. but i seem to recall, some ignition coils have a resistor attached to it...

  10. Join Date
    Aug 2012
    Posts
    61
    #10
    Quote Originally Posted by dr. d View Post
    it's been a looong time.. but i seem to recall, some ignition coils have a resistor attached to it...
    Yes meron po yung akin, white bar about 2.5- 3 inches wide and 1 inch thick. Although it seems odd na lahat ng contact/wire na nakakabit sa resistor ay sa isang place lang at yun mga wires na yun parang papunta sa positive terminal ng ignition coil. Sa kabilang side naman ng resistor ay walang nakakabit. I'm still studying the wiring diagram nito.

    Definitely I need a full re-wiring or wiring overhaul kasi salasalabat ang mga wirings eh. I plan to do it DIY, section by section.

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