Rough Idle when cold!
Thread Starter
|
New User
Joined: Jan 2004
Posts: 7
Likes: 0
From: South Glens Falls, NY
Rough Idle when cold!
I have a 2000 Explorer and live in upstate NY. It has been very cold the last couple of day's. When my wife goes out and starts the Explorer it reves up and the down and quits. It doesn't seem to want to hold the high idle. I have just replaced all 4 O2 sensors because the service engine light came on. After the Explorer warms up about 5 min. it will run great? So can anybody tell me what is causing this to go from 1500 rpm to 0 and so on? Is there a sensor somewhere? Thanks
Bob
Bob
Fleet Mechanic
Joined: Oct 2003
Posts: 1,764
Likes: 0
From: CentralEastern Utah
My 2000 does the same thing. I've changed the intake gaskets and the MAP sensor with no luck. I'm looking to change the IAC next and hope that fixes my problem. On the main forum page at the top there is a sticky on the IAC that may be very helpful to you. Its also about the easiest thing to check out first.
New User
Joined: Jan 2004
Posts: 5
Likes: 0
98 Explorer won't run when cold
I have the same problem. When outdoors temp is below about 45 degrees, the car idles very irratically until engine warmed up. Temps in the 20's make it almost impossible to keep running - starts and revs way up, then dies over and over. If you can get going, it will keep running (poorly), then when warms up it is fine.
I have replaced the IAC with no improvement. On possibly related note, the heating system will only give out max hot air (except in Max airconditioning or Auto) regardless of the temp setting I select - but I haven't been able to hear/identify a vacuum leak. Any suggestions?
I have replaced the IAC with no improvement. On possibly related note, the heating system will only give out max hot air (except in Max airconditioning or Auto) regardless of the temp setting I select - but I haven't been able to hear/identify a vacuum leak. Any suggestions?
New User
Joined: Jan 2004
Posts: 5
Likes: 0
Thanks for the reply. I have a SOHC 4.0 engine also. How big a job is it to replace the O-rings?
Trending Topics
Fleet Mechanic
Joined: Oct 2003
Posts: 1,764
Likes: 0
From: CentralEastern Utah
The upper ones I changed my-self, wase'nt too bad. The lower ones looked like a pain so I farmed them out to a mech.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Senior User
Joined: Apr 2003
Posts: 123
Likes: 0
From: Caledonia, Ontario
I have the exact same problem also. My question is how bad does the fuel milage go when the weather goes cold like this with this problem? I have about a 20% in fuel milage in the cold weather and can justify spending the money to fix the starting problem if it fixes the milage problem too.