Hi, I need help. I have a 1999 Trooper. Back in April I replaced two of the ignition coils after the check engine light came on. Also cleaned the ERG valve. (I'm not actually doing this work, but a friend is doing it for me. I'm doing all the research.) The vehicle ran ok, but not perfectly until about a week ago when the check engine light came back on. Replaced another ignition coil, but this time the cel came back on. Took it to Autozone and they said the codes indicated it needed spark plugs. They gave me Bosch Platinum, said they were best for my vehicle. Changed the plugs, a couple trips (that same day) later cel back on. The cel came on after the car engine surged high and low, just once on start up. I've noticed the surge for about a week. Not horrible, but noticable.
Now I started reading on line about ignition coils and there is some discussion about a change in July 1999 and that now there is a 5 pack for all coils except for the one cylinder 6 coil that is separate. This is the first time I read that. I got the original coil from the Isuzu dealer and they tell me that the part number is the same for all 6.
Can you guys help me? I also read on this forum that the Bosch plugs cause the cel light to come on. That may be the case, but there is something else wrong here. The vehicle runs better but not perfectly. I figure that since the first coil needed replacing last April that the rest must not be far behind and need replacing too. I was all set to order the rest of the replacements until I started reading that I might need this 5 pack and the separate one for the 6th cylinder.
The person helping me is good at actually doing this kind of work. Not a mechanic but he has patience and does his own work. But he doesn't know anything about the Trooper. So, what can you suggest in terms of articles, guidance, your own wisdom.
Thank you all for your help.
:shock:
Now I started reading on line about ignition coils and there is some discussion about a change in July 1999 and that now there is a 5 pack for all coils except for the one cylinder 6 coil that is separate. This is the first time I read that. I got the original coil from the Isuzu dealer and they tell me that the part number is the same for all 6.
Can you guys help me? I also read on this forum that the Bosch plugs cause the cel light to come on. That may be the case, but there is something else wrong here. The vehicle runs better but not perfectly. I figure that since the first coil needed replacing last April that the rest must not be far behind and need replacing too. I was all set to order the rest of the replacements until I started reading that I might need this 5 pack and the separate one for the 6th cylinder.
The person helping me is good at actually doing this kind of work. Not a mechanic but he has patience and does his own work. But he doesn't know anything about the Trooper. So, what can you suggest in terms of articles, guidance, your own wisdom.
Thank you all for your help.