sluhbmet
New Member
- Joined
- Oct 3, 2007
- Messages
- 25
- Reaction score
- 1
- Points
- 0
- Location
- Maumelle, Arkansas
- Vehicle Year
- 1995
- Make / Model
- Ford
- Engine Size
- 4.0
- Transmission
- Manual
About a month ago I decided to perform a much needed tune-up on my stock 95 4.0 Ranger ext. cab 4X4 5-speed, because the idle seemed to fluctuate a little (between 500-750 rpm). I started with new Autolite spark plugs. I inspected the plug wires, and all connections appeared clean and shiny, so I did not replace them. I replaced the fuel and air filter next. I purchased the correct cleaners for the MAF sensor and the throttle body assembly. I cleaned both the throttle blody and MAF sensor assemblies to pristine condition. I allowed them to dry and then reinstalled them. The next step was the idle air controller. I removed the idle air controller and found some carbon buildup inside it. I used carburetor cleaner to clean out all of the buildup and let it dry before installing back on the truck. Ever since then, the truck starts perfectly but when I come to a stop light and push in on the clutch, the idle stays at about 1500 rpm for several seconds, then gradually steps down to about 900 rpm's. I did some research and found that I may have damaged the throttle position sensor while spraying the throttle body with cleaner. I replaced the throttle position sensor with a new motorcraft/ford one from the parts store. Replacing it did not help the problem, so I figured maybe I damaged the IAC when cleaning it. Replaced the IAC with a Borg-Warner replacement from the parts store. This also did not help. I am now at almost a total loss as to what the problem could be. The only two things I can think of would be maybe the intake air temp sensor was damaged during cleaning or maybe I bumped a vacuum hose loose when replacing the spark plugs. There are no "check engine" lights on, and I did not touch the idle set scew when cleaning the throttle body assembly. Also, I unhooked the battery from the truck for about 4 hours to reset any bogus values stored to the ecm during parts swaps, this also did not help. Any help from you guys would be greatly appreciated. Thanks in advance for your replies.
Sluhbmet
Sluhbmet