4g63 DOHC engine common failures

[hi-rev]

Greetings mga sir,
paki post po yung mga common failures ng 4g63 engine, nwei i nid HEEELP sa inyo,
hopeless na po ako, May experience po ak ng basic troubleshooting, but in this time di na kaya ng powers ko, my problem is "PUMUPUGAK" once na ni re-rev ko sya, little by little bumababa na yung rev nya until na tumirik. Minsan ginagawa ko para maiuwi ko yung car sa hows namin, pinapalamig ko muna so yun ang nagagawa kong paraan.Ever since, 5yrs na yung car ko, ngayon lang ako na ka encounter ng ganito, nag elimination process na ako, 1st=( checking fuel pump, rail, fuel filter, fuel return line) oks naman yung flow ng fuel going through fuel rail and injectors, 2nd=(checking air filter and air flow connection) wala naman butas or bara 3rd=( replacing spark plug), 4th-( injectors connections) once na running yung engine, feel ko yung ticking ng injectors i guess oks naman, 5th-(high tension wire) my spark naman once na hinuhugot ko one by one kapag umaandar yung makina, 6th-(timing) sa timing naman po smooth naman yung flow and alam ko naman po kung talon or not,so expected ko oks na. Every morning start ko yung engine maayos and smooth yung andar, rev ko sya minsan 7500 oks naman, walang limit.so expected ko everythings fine, share ko sa inyo yung pag upgrade ko sa engine. headwoks (port and polish) turbo cams, headers yung iba accessories lng so yu lang po.N/A lang po yung engine ko dating turbo, nabili ko na sya N/A na po.Umalis na ako from hows and after mga 1hr. AYAN NA!!! ang symptoms nya once inapakan ko yung gas, 3rd gear!! walang power!!, humahagok na, siguro 5km lang ang pwede nya i-reach yung car ko, so yun ang problema ko mga sir, sa start oks naman yung running nya pero once na tumatagal, yun ang nagiging problema, somebody told me sa mga nearest auto supply baka raw distributor daw, minsan nag pa karga ako ng fuel w/ 10% E10 dun sy nag simula na pumugak, ginawa ko drain ko yung feul tank, change to XCS, kala ko sa gas pero umulit ulit.Baka pwede nyo akong tulungan to solve this situation.

[p_borj]

ibalik sa stock lahat.

[speed unlimited]

Na pa check mo na ba iyong Mass Air Flow Sensor mo.

[niky]

Check and clean the throttle body and intake control valve... and make sure the vacuum fittings are tight. Sometimes these things can become stuck open (oh... check the EGR valve, also, if it's still fitted) after you've been running hot for a while if they're dirty.

[hi-rev]

Check and clean the throttle body and intake control valve... and make sure the vacuum fittings are tight. Sometimes these things can become stuck open (oh... check the EGR valve, also, if it's still fitted) after you've been running hot for a while if they're dirty.

thank you very much sir,
try ko muna yung tips nyo, actually 6mon ago nag top over haul ako so raplace lahat ng valve and malinis na rin yung intake, pero try ko muna tanggalin yun head para makita ko, tnx sir

[hi-rev]

try ko i pa check sir, am i right ba sir kasi nung na palyado na yung engine try ko inalis yung connection ng air sensor pero walang nangyari, ganun parin yung respond ng engine, try kong palitan ng coil kasi sabi ng iba coil daw kpg umiinit bumababa yung resistance ng power kaya palyado, may nag pahiram sa akin yung coil, kanina nag test drive ako siguro pumalya after 10min, nag palit ako ng coil, ganun parin, my brand new spare ako ng spark plug, mdyo na improve yung engine kaya nakauwi ako sa hows, pag dating sa hows palyado na, walang hatak, once na pinapalamig ko nagiging ok naman, pero kapag tumatagal pumaplya na, yung luma kong spark plug, reach ang sunog nya kaya maitim it means ang daming gas na di nasusunog, try ko check yung return diaphragm ng fuel baka nasasakal and injector, guess ko baka electrical, tnx sir

[deadlyhunk]

sir try mo ung computer box mo p diagnose try mo d2 s DGK AUTO ELECTRONICS RE-MANUFACTURING bandang paranaque or call there tel. no. 492-78-01 for your query nag repair din sila ng computer box try mo lng sir hope it will help you