If the code keep coming after replacing the switch and tested the glow plugs and deleting the code then it may be or could be the type of oil you use. As far as the rough start it may be the injection pump. I remmber your Isuzu has recall on injection pump that year check the pump and if any recall. How that give you another prospective to help troubleshoot the problem. God bless
After warm up, disconnect the wires to the cold start switch and see will it start easily after warm up. If it starts easily, you found your problem. Cold start switch being faulty will keep giving it too much fuel making it a rough start after warm up. Remember, this stuff is operated by a computer now.
SOURCE: 1998 Isuzu Bighorn Diesel. The car just won't start
I have a 1998 Bighorn 3.0L if the wrong grade of oil is used in the motor it miss fires and runs rough, due to the injectors being oil pressure controlled, I have heard of extreme cases causing a failure to start when cold. good luck
SOURCE: Isuzu bighorn diesel 4jg2 engine timing diagram
http://www.jeepolog.com/UserFiles/downloads/trooper_manual.pdf
This site has it .
SOURCE: how do i reset my timing beltwarning light after
this is not right there should be a rubber grommet in cluster lens take out and press button with ignition on to reset light just like resetting trip meter
Its a diesel and its running away so do not try to start till you do the following and yes i know i will be amolished for being a cowboy by the other experts but what you do is to make a gasket for the EGR valve from a coca cola can and seal it off if you dont it may run away and blow itself to pieces .If you do this then it run as normal as the older trucks never had these thing fitted and they all run ok in my day ,exactly whats wron i couldnt tell you without my head under the bonnet but do as i say and it run perfectly
232 views
Usually answered in minutes!
×