Help guys! 4JX1 rough idling & loss power

**autofrost** · November 18th, 2007 11:21 AM

need yor help guys on this, i know dami na thread re: trooper, but i cant help to seek possible answers on my problem. Moderators pls excuse me on this. My problem is that the idling is a bit rough & even if you rev up the accelerator, it cant go beyond 2.5 rpm, speed at running can just reach 90 kph. pls let me know the possible remedies & solution on this, the possible parts that need replacement & how much it will cost me. tnx

**jarhead** · November 19th, 2007 05:27 AM

sir, its your injectors narin... maybe lang... just have t chekced sa casa and dpaat free yan pag replace ng injectors... and try to replace some sensors in it narin... meron kc sensor sa injectors.. baka na afected din yun.. just forgot the name of the sensor... ganyan din kc symptons ng trooper namin... rough idling den mahina ang power... anong year ba trooper mo???

the sensor pala hinid ko alam kung mai libre b nila and it wud just cost u around 5k instead of paying the injectors na aabot ng 100,000...

**RedHorse** · November 19th, 2007 07:26 AM

solution 1

replace the fuel filter with original isuzu fuel filter
use "liqui-molly" diesel purge
whenever possible, buy diesel from 1 station only and from a particular dispenser

if this solution fails...

apply what was posted by jarhead

**av8or5** · November 19th, 2007 09:59 AM

Originally Posted by jarhead

sir, its your injectors narin... maybe lang... just have t chekced sa casa and dpaat free yan pag replace ng injectors... and try to replace some sensors in it narin... meron kc sensor sa injectors.. baka na afected din yun.. just forgot the name of the sensor... ganyan din kc symptons ng trooper namin... rough idling den mahina ang power... anong year ba trooper mo???

the sensor pala hinid ko alam kung mai libre b nila and it wud just cost u around 5k instead of paying the injectors na aabot ng 100,000...

the sensors are rpcv and rpcv sensors. sensors are P4k++

dont forget to replace the 0-ring; and try to get IPC to warranty the injectors. mahal din yun.

**autofrost** · November 20th, 2007 10:00 PM

thanks guys sa reply, yesterday i have my trup tech 2 at bmd motors, what they found out was a busted map sensor, it stands for manifold absolute pressure sensor, kaso wla sila available agad parts. So what i did, i get the sample parts and i try walco if they have one. Fortunately meron sila agad * P4.2t, I will just bring the sensor tommorow for installation, sana it will solve my problem na. Will keep you updated guys! TNX!