Brandoncw
New Member
- Joined
- Mar 7, 2016
- Messages
- 22
- Reaction score
- 14
- Points
- 3
- Transmission
- Automatic
EDIT: This is a 1999 ranger non flex-fuel 3.0
So I had a cylinder 5 and 6 misfire. Narrowed it down to bad valves. After I replaced the head it no longer will idle right. It idles rough at about 400 rpm, sometimes it kinda lopes. If it does idle right, as soon as you put any load on the engine it falls flat on it face and stumbles. I put new injectors, lifters, and pushrods in it while I had it apart. New MAF sensor the week before. I checked over every electrical and vacuum connection I could find and no luck. I found its kinda drivable with the MAF unplugged. If I unplug the IAC sometimes it stalls, sometimes it starts idling perfect. I'm stumped, any help is appreciated
I checked voltage at IAC, said 12 volts KOEO, also checked IAC resistance. It came out at 9 ohms. Truck ran perfect aside from misfires at idle before the head replacement
So I had a cylinder 5 and 6 misfire. Narrowed it down to bad valves. After I replaced the head it no longer will idle right. It idles rough at about 400 rpm, sometimes it kinda lopes. If it does idle right, as soon as you put any load on the engine it falls flat on it face and stumbles. I put new injectors, lifters, and pushrods in it while I had it apart. New MAF sensor the week before. I checked over every electrical and vacuum connection I could find and no luck. I found its kinda drivable with the MAF unplugged. If I unplug the IAC sometimes it stalls, sometimes it starts idling perfect. I'm stumped, any help is appreciated
I checked voltage at IAC, said 12 volts KOEO, also checked IAC resistance. It came out at 9 ohms. Truck ran perfect aside from misfires at idle before the head replacement