Pajero 4M40 Cold Start

[lancelot]

Gurus,


I noticed after my long trip back from the province, upon starting it in the morning malakas yun vibration ng engine and then tapakn mo gas mamamatay. After a few starts like this normal na sya. And during the whole day ok na sya. During 1st few starts in the morning. Nagstart lang talaga ito after my long trip back and forth to the province.

What could be the problem, dinala ko na to my 2 suking talyer, wala daw sila mkitang problema. Hindi raw mababa idling, oil/air filters were changed 2 months ago. Pinacheck ko rin engine support pero ok din daw. Sabi ng isa injection problem daw??? Pero I doubt it...

What could possibly be the problem. By the way 38th palang takbo ng ride ko. Thanks.....

[lancelot]

Pahabol lang glow plugs ko rin daw ok, all 4 were changed last december lang.

[johnart]

could your fuel be contaminated ? Like you had it filled up in an unfamiliar gas station ?

[pajerokid]

yup, could be a case of bad fuel.

[lancelot]

johnart, pajerokid,

I usually fill up my ride with Shell only and usually I go to large gasoline stations.

If this is the culprit, can you suggests ways to solve the problem?

Thanks....

[pajerokid]

kung yun nga, just drain the tank and get a fresh batch.

not sure lang pre, pero you could also check the fuel filter and injectors. Not sure lang uli, pero a calibration may be in order.

[ARB]

looks like there is air in your fuel lines every morning. check mo check valve sa injection pump and sa may feed pump.

[lancelot]

ARB,

Pardon me for my ignorance, how will i know if there is air in the system?

DIY? lang ba sya?

Thanks

[afrasay]

check mo yun wire that is connected sa water sensor under ng fuel filter. may times na may crack yun and air could sipped in.

[ARB]

usually pag may air ang fuel lines may misfiring feel like sa mga gas engines, especially on idle, but hardly felt on high rpm. the air will disappear after the car has run, unless my leak ang fuel lines then there will be air pockets in the fuel and misfiring or palyado feel can sometimes be experienced.

[PajHERoY]

sirs,

what should be the idling behavior upon first start ng 4m40 sa umaga, will it start on a high rpm then gradually go lower as it heats up?

i never really noticed until kanina, nagpa 30k check-up ako kahapon and i noticed this morning na kabaligtaran ang nangyari. nagstart sya at low rpm like around 6000 to 6500 then umangat after awhile.

what you guys think?

[Ungas]

Sumobra yata yung zero? Lampas na yan sa redline ng diesel engines usually at 4200 mark. :D

[pajerokid]

sir, 6000-6500 rpm??? Baka 650? Redline na ata yung 6000 eh.

I haven't really noticed myself. Check ko mamaya.

[Ronald Ventura]

What's a good time to consider calibration or change of glow plugs or injectors? Will any of these improve fuel consumption?

[PajHERoY]

hehe sori, sumobra nga ng 0, my bad.

[PajHERoY]

ganun pa rin ang nangyari sa pag start ko today. parang ang baba ng idling rpm ko, mga 850 yata yun.

[lancelot]

ARB,

I had my fuel lines checked yesterday. I had the Fuel Filter Bled (tama ba?) And upon starting this morning ganun pa rin.

What can be the cause? Injection? Saan ko pwede pa check ito.

And iniisip ko lang kung injector dapat hirap na sya sa daytime pero during mornings lang.

Help!!!

TY

[levi]

I have the same problem with my Gen 2.5. When I start in the morning normal for a few seconds then mag drop ang idling so I have to rev the engine ng mga 1500 to 2000 till mag init. Pagnamatayan ka bago maginit, mahirapan ka na mag start. My glow plugs are only a few weeks old and I already installed a manual switch to turn off the plugs after starting. According to a mechanic of mitsubishi, the reason nasisira ang plugs agad because matagal mag auto off. Im using a switch with light so I know if the plugs are on or off. To make it start without misfiring, I have to turn on the plugs then I have to wait for the plugs to turn off ( switch light ) before I start the engine. Medyo nakakaasar dumadami ang seremonya every morning lalo na kung iba ang gagamit ng kotse. Namamatayan sila.

[promdiboy]

that's bad news sa ating mga naka 4m40 engine. sa umaga ang problem. why not try using thinner oil like 5w-30, and diesel booster from petron. 44 pesos lang naman isa, every full tank. bboth can help sa cold starts, yan ang gamit ko. I know di siya solution, pero malay mo mapadali ang warm up ng engine.

[pajerokid]

Thank God mine's not like that. Have you tried using the manual choke in the morning?