cold start problems
#1
Member
Thread Starter
cold start problems
I have a 97 explorer when I start it. it starts running from high idle to almost killing and does this until it worms up.Also when I put the defrost on the air compressor keeps kicking in and out. thanks Ken
#3
The engine surging up and down at idle is usually a sign of a vacuum leak. You didn't say which engine you have but if it is a 4.0L SOHC, upper intake gaskets are very common on those. If it is a 4.0L OHV the o-ring on the EGR tube is very common. Both can be easily checked, start the veh cold, and spray the areas mentioned with carb cleaner/choke spray. If the idle comes up and the veh runs normal, you have found the problem.
#6
Member
If the vacuum leak areas check out, the idle may just be the fast idle for a cold engine, and the dieing down is from a bad water temp sensor.
I had about the same problem with my Ranger and a 2.9. It did OK when the weather was down in the single digits to teens, but anything above that I would get the normal fast idle, then the engine would either die or slow down and surge until it was warmed up. I replaced the water temp sensor for the computer and it been fine ever since.
Hope this helps,
Bob
I had about the same problem with my Ranger and a 2.9. It did OK when the weather was down in the single digits to teens, but anything above that I would get the normal fast idle, then the engine would either die or slow down and surge until it was warmed up. I replaced the water temp sensor for the computer and it been fine ever since.
Hope this helps,
Bob
#7
Member
Thread Starter
Thanks for the info I'll check it out. Mine seems to be doing it when the weather gets colder!