4JA1 Engine, Are there any problems?

**aioshin** · October 4th, 2014 08:49 PM

ano naman kaya problema kung paakyat, parang hirap, yung stop ka then paakyat na, so start ka sa first gear, tapos nahihirapan... ano kaya pasibleng problema... new fuel filter, new air filter, just cleaned water separator. Napansin ko lang, almost half yung temperature ng engine sa gauge... sentomas ba to nang isang engine problem?

**miked** · October 12th, 2014 11:59 PM

Originally Posted by aioshin

ano naman kaya problema kung paakyat, parang hirap, yung stop ka then paakyat na, so start ka sa first gear, tapos nahihirapan...

from my experience and some research on the net, may dalawang transmission models fitted sa mga 4JA1. eto ay yung MUA & MSG. the MUA trans have higher gear ratios so much better ito on uphill climbs, load carrying, etc. yung company service ko non e MSG. hirap na hirap umakyat pero nakaka 140 kmh sa hiway. MUA trans oil capacity is about 3 liters while yung MSG e approx 2 liters naman. nalaman ko ito nung drinive ko yung isuzu pickup ng kaibigan ko. ramdam na ramdam ko yung difference sa uphill climb and load carrying sa 1st gear pa lamang. mas relax ang makina sa MUA trans.

from my observation, may selected models ng LS (pre fuego models) at siguro may konting fuego models na naka-MUA transmission. at lahat ng IPV e naka-MUA trans din. ang quick way para malaman is the length of the shift lever at yung location nya on the transmission tunnel sa body. mas malapit sa engine yung shift lever ng MUA kesa sa MSG trans.

i'm planning na rin na iswap ang aking lumang mitsu pickup sa isuzu pickup e. nakakasawa na rin isipin parati yung kondisyon ng timing belt ko.

**Bags™** · October 25th, 2014 07:13 PM

Originally Posted by miked

from my experience and some research on the net, may dalawang transmission models fitted sa mga 4JA1. eto ay yung MUA & MSG. the MUA trans have higher gear ratios so much better ito on uphill climbs, load carrying, etc. yung company service ko non e MSG. hirap na hirap umakyat pero nakaka 140 kmh sa hiway. MUA trans oil capacity is about 3 liters while yung MSG e approx 2 liters naman. nalaman ko ito nung drinive ko yung isuzu pickup ng kaibigan ko. ramdam na ramdam ko yung difference sa uphill climb and load carrying sa 1st gear pa lamang. mas relax ang makina sa MUA trans.

from my observation, may selected models ng LS (pre fuego models) at siguro may konting fuego models na naka-MUA transmission. at lahat ng IPV e naka-MUA trans din. ang quick way para malaman is the length of the shift lever at yung location nya on the transmission tunnel sa body. mas malapit sa engine yung shift lever ng MUA kesa sa MSG trans.

i'm planning na rin na iswap ang aking lumang mitsu pickup sa isuzu pickup e. nakakasawa na rin isipin parati yung kondisyon ng timing belt ko.

Pwede po ba yun malaman depending on the manufacturing year ng sasakyan? Mine is a 1992 Isuzu LS Model 4x2. Thanks sir!