4ja1 low idle on coldstart

**Yatta** · December 30th, 2017 05:13 AM

Originally Posted by anthon05

just recently on cold start my engine's rpm falls and until it dies out.

this happens on inclined parking. ano kaya nangyari? I replaced the filters and

bled the sedimenter. if I use the choke to increase rpm or step on the pedal hindi

ayos na siya and if mainit na engine. anyone experience this?

Thank you

Have ypur fuel injector pump checked sir. i experienced the same before in our Hilander. Culprit is a broken spring, dirt and water inside. The pump is a common problem among Isuzus (even Fuegos).

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**anthon05** · December 30th, 2017 07:44 PM

I brought it to the calibration shop the mechanic said the injection pump is fine, engine running well and no visible smoke.

but he cannot identify the problem so suggested to check the injection pump might be some parts that need to be replaced.

that's my last option.

Earlier today in desperation I replaced the clamps of the fuel hoses going to the fuel filter and sedimenter it seems like

its not that tight. OEM clamps are like clips so i replaced with clamps that has screws. i will give feedback tomorrow.

Thank you to all the advice. .

**anthon05** · January 2nd, 2018 11:14 AM

After replacing fuel clamps on the fuel hoses it did improve. idle goes down but

engine did not shut down. I think I have to replace the fuel hoses. its a 17 year old vehicle and oem clamps have no screws but clips might have lost its

'grip' .

**aioshin** · January 3rd, 2018 05:33 PM

Originally Posted by anthon05

After replacing fuel clamps on the fuel hoses it did improve. idle goes down but

engine did not shut down. I think I have to replace the fuel hoses. its a 17 year old vehicle and oem clamps have no screws but clips might have lost its

'grip' .

Meron na bang leak ang fuel hose due to old fuel clamps?

My ride is a highlander, so 4ja1 din. A year ago, i have this engine issue na bigla na lang namamatay while running, kahit naka 4th gear. Biglang mag zero rpm, kakatakot nga, buti na lang nasanay ako, almost a year ko yun dinadala, hangang mag decide ako mag pa check ng Injection pump, overhaul ng injection pump pinagawa ko dun sa trusted shop. Yun pala, pumasok na ang oil dun sa shafting nung Pump connected sa engine, kaya namamatay bigla, after that and until now, so far di ko na na experience yun. 10K gastos ko replace nung shaft and other o-rings and ano ano pang rubbers.

**anthon05** · January 4th, 2018 03:49 PM

wala naming leak, wala rin akong naaamoy na fuel. napansin ko lang

maluwag yung hoses, madaling tanggalin at madaling ikutin even with clamps.

my next move it to replace the fuel hoses. yung dinala ko sa calibration ang sabi niya possible may oil sa pump. hindi ko lang ma understand saan galling oil, maybe from adding 2t everytime I fill up. hindi lang ako convince kasi maganda ang hatak and hindi naman mausok.

earlier on coldstart ni ramp ko sa incline (paakyat) bumaba rpm. pero kung pababa naman normal siya or flat road.

**jaypee10** · January 4th, 2018 04:54 PM

ganyan problema ng kumpare ko sa XLT pamasada niya nag lolow power.ganyan ung dinadaing niya wala kayong pagkakaiba ng problema.diko lang alam kung pano na solve.ngayon matino na makina niya..

**Yatta** · January 4th, 2018 05:34 PM

Originally Posted by anthon05

wala naming leak, wala rin akong naaamoy na fuel. napansin ko lang

maluwag yung hoses, madaling tanggalin at madaling ikutin even with clamps.

my next move it to replace the fuel hoses. yung dinala ko sa calibration ang sabi niya possible may oil sa pump. hindi ko lang ma understand saan galling oil, maybe from adding 2t everytime I fill up. hindi lang ako convince kasi maganda ang hatak and hindi naman mausok.

earlier on coldstart ni ramp ko sa incline (paakyat) bumaba rpm. pero kung pababa naman normal siya or flat road.

Kung humihina paakyat, suspect ang fuel pump.

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**anthon05** · January 4th, 2018 06:39 PM

kung I rev ko wala namang problem malakas ang hatak. yun lang pag steady

or park mo sa paakyat sa umaga bumababa rpm hanggang sa mamatay makina.

pero kung mainit na makina kahit naka steady sa paakyat hindi na mamatay makina

**Yatta** · January 4th, 2018 07:21 PM

Originally Posted by anthon05

kung I rev ko wala namang problem malakas ang hatak. yun lang pag steady

or park mo sa paakyat sa umaga bumababa rpm hanggang sa mamatay makina.

pero kung mainit na makina kahit naka steady sa paakyat hindi na mamatay makina

Ganyan na ganyan ang problema nung Hilander namin. I'm telling you get that injector pump fixed.

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