Ranxeroxlubna
Member
- Joined
- December 30, 2014
- Messages
- 38
- Reaction score
- 1
- City, State
- Miinneapolis
- Year, Model & Trim Level
- 1998 Mercury Mountaineer
1999 Ford Explorer 4.0 SOHC Limited 197,800 miles.
Initially, the hesitation began just at the start up. Wait a second and it would smooth out and no problems.
2 days ago the following happened.
What I have done.
Not sure what to do.
Initially, the hesitation began just at the start up. Wait a second and it would smooth out and no problems.
2 days ago the following happened.
- Motor died on the road.
- Repeated attempts to start it resulted in a stuttering idle, bucking, and the motor stopped running.
- After restarting the motor, if you work the throttle and let the engine spool up, it would accelerate up smoothly to wide-open throttle.
- If you open the throttle all they way suddenly, you get backfires in the manifold and the hesitation and stuttering really go nuts.
- I drove it home after clearing out whatever was involved, it stuttered and hesitated all the way home, but it got there. I put it in neutral at the lights and revved it up to keep it going.
What I have done.
- I sprayed starter fluid on all the vacuum connections with no change to the idle.
- I pulled the spark plug cable off the coils, one at a time; the front row caused major changes to idle, the back row did not seem to have as much of an effect, less as moved from 3-2-1.
- I disconnected the MAF connector and it did have a very subtle effect.
- I disconnected the intake hose at the throttle body and it ran a bit better, although moving the throttle manually repeated the aforementioned problems.
- When I reconnected the intake hose to the throttle body, it just died.
- I get no codes.
- The computer seems to struggle to connect with the diagnostic device.
- I cleaned the MAF in late summer.
Not sure what to do.