BroncoBhadBhaby
New member
Ok so maybe this might sound like a broken record. After scowering the internet for weeks I still have yet to find a solution to my issue.
For about 3 months my truck 94 5.8 Bronco (recently converted to manual MDO5 was done in June 2019) has had an idle speed of 2000 - 2500 rpm on a cold start. It'll take it about a minute to drop. However once the truck is warm it ranges from 500 - 1000 rpms bad hunting. Not stalled or died.
Lately it's been stuck on 1000 when driving. When in idle it hunts. This happens even when everything is off AC, heater, light and radio. I have notice some loss in power as well.
Things I've done:
Normal maintenance (tune up, oil and coolant changes)
Replaced IAC
Cleaned the throttle body
Change the broken gasket on throttle body
Checked coolant and oil for pudding there was none.
I want to go on and on about vac leaks but I replaced the IAC valve a buddy of mine said to unplug it and see if dies. Not only did it Not Die but also ran normal no high idle and it stopped hunting it ran just right to spec.
I was confused I chose not to drive it that I've read some forums where people have and now their trucks don't turn on.
I have no codes on my dash yes it fully functional.
I am sort of a novice mechanic when it comes to my bronco.
Can someone please recommend a standard of procedure to help me get to the issue. PLEASE DO NOT suggest I using anything flammable to check for a leak
not that I'm afraid I'd just rather not lol.
Thanks
For about 3 months my truck 94 5.8 Bronco (recently converted to manual MDO5 was done in June 2019) has had an idle speed of 2000 - 2500 rpm on a cold start. It'll take it about a minute to drop. However once the truck is warm it ranges from 500 - 1000 rpms bad hunting. Not stalled or died.
Lately it's been stuck on 1000 when driving. When in idle it hunts. This happens even when everything is off AC, heater, light and radio. I have notice some loss in power as well.
Things I've done:
Normal maintenance (tune up, oil and coolant changes)
Replaced IAC
Cleaned the throttle body
Change the broken gasket on throttle body
Checked coolant and oil for pudding there was none.
I want to go on and on about vac leaks but I replaced the IAC valve a buddy of mine said to unplug it and see if dies. Not only did it Not Die but also ran normal no high idle and it stopped hunting it ran just right to spec.


I have no codes on my dash yes it fully functional.
I am sort of a novice mechanic when it comes to my bronco.
Can someone please recommend a standard of procedure to help me get to the issue. PLEASE DO NOT suggest I using anything flammable to check for a leak

Thanks