A slight Idle problem on an '05 Explorer
#1
A slight Idle problem on an '05 Explorer
Hey guys any idea on what's causing my idle problem?
Not a big deal but it should be smooth.
Here's the scenario.
10K miles.4.0 L
Start up it's idles fine.
Then after say 10 seconds she idles a bit rough,then smooths out,then seconds later idle a bit rough again.
A bit rough.
Not bad but still not right.
Any ideas?
Not a big deal but it should be smooth.
Here's the scenario.
10K miles.4.0 L
Start up it's idles fine.
Then after say 10 seconds she idles a bit rough,then smooths out,then seconds later idle a bit rough again.
A bit rough.
Not bad but still not right.
Any ideas?
#2
#3
Originally Posted by supertomatoe
i have a 05 with same thing only 500 miles . dealer said it was normal because of the cams. dont know if thats true . they also reprogramed the computer cause they said there was so new software.
Interesting.
I just bought the truck a few weeks ago from a Ford dealer.
I thought maybe a 20 ounce Techron fuel injector cleaner would help but it didn't.
I don't buy the normal B.S. service advisors answer to a problem.
I'll see if I can find a TSB.
#5
Originally Posted by JimiG
I have 05 4.0L with 3250 miles and it does the same for me. It doesn't seem to effect anything.
TSB 04-21-12
Rough Idle
Issue
Some '04-'05 Explorer/Mountaineers built before 10/04/2004 with a 4.0L may exhibit a rough idle/vibration at base idle and trans in drive.
This condition may also be described as an intermittent shake or bobble at idle.
Action
Reprogram powertrain module to the latest calibrations using WDS B33.10 or higher.
Calibrations files may also be obtained at website.
Check for Diagnostic trouble codes and reprogram powertrain module 0.4 Hrs labor.
My Explorer has a slight rough idle.
Not a big deal but will let Ford check it out when something else goes wrong.
Until then I can live with it.
#7
There really shouldn't be much variation at all at idle. It's not like Ford is going to program a little richer, a little leaner, a little richer, a little leaner...either over time after start up or in relation to engine temp or any other sensors. There should be a linear curve of the A/F ratio over certain conditions. Cold start runs rich and holds idle at 1,200 R's, then drop to 1,000 R's, then 800...and also in response to engine temp but always linear. As engine warms up, A/F goes leaner.
I even had a TSB back in 95 for my 93 Explorer - change PCM to a 94 unit with rich cold start table. So this type of updating the computers for idle problems is not new. But the update should have fixed the problem in its entirety.
If you stil have concerns, it's likely an actuator is not doing what the PCM says. Like the IAC may be bad and not controling idle correctly. I've even heard of relatively new DPFE EGR sensors being bad causing idle problems. If they report back more or less actiula EGR fuel, the PCM can't send the right amount of fuel to the motor - rough idle. Then the O2's fight back...kind of an endless cycle.
If it's still showing issues, don't live with it. Make Ford fix it.
I even had a TSB back in 95 for my 93 Explorer - change PCM to a 94 unit with rich cold start table. So this type of updating the computers for idle problems is not new. But the update should have fixed the problem in its entirety.
If you stil have concerns, it's likely an actuator is not doing what the PCM says. Like the IAC may be bad and not controling idle correctly. I've even heard of relatively new DPFE EGR sensors being bad causing idle problems. If they report back more or less actiula EGR fuel, the PCM can't send the right amount of fuel to the motor - rough idle. Then the O2's fight back...kind of an endless cycle.
If it's still showing issues, don't live with it. Make Ford fix it.
Trending Topics
#8
Originally Posted by Jharger
There really shouldn't be much variation at all at idle. It's not like Ford is going to program a little richer, a little leaner, a little richer, a little leaner...either over time after start up or in relation to engine temp or any other sensors. There should be a linear curve of the A/F ratio over certain conditions. Cold start runs rich and holds idle at 1,200 R's, then drop to 1,000 R's, then 800...and also in response to engine temp but always linear. As engine warms up, A/F goes leaner.
I even had a TSB back in 95 for my 93 Explorer - change PCM to a 94 unit with rich cold start table. So this type of updating the computers for idle problems is not new. But the update should have fixed the problem in its entirety.
If you stil have concerns, it's likely an actuator is not doing what the PCM says. Like the IAC may be bad and not controling idle correctly. I've even heard of relatively new DPFE EGR sensors being bad causing idle problems. If they report back more or less actiula EGR fuel, the PCM can't send the right amount of fuel to the motor - rough idle. Then the O2's fight back...kind of an endless cycle.
If it's still showing issues, don't live with it. Make Ford fix it.
I even had a TSB back in 95 for my 93 Explorer - change PCM to a 94 unit with rich cold start table. So this type of updating the computers for idle problems is not new. But the update should have fixed the problem in its entirety.
If you stil have concerns, it's likely an actuator is not doing what the PCM says. Like the IAC may be bad and not controling idle correctly. I've even heard of relatively new DPFE EGR sensors being bad causing idle problems. If they report back more or less actiula EGR fuel, the PCM can't send the right amount of fuel to the motor - rough idle. Then the O2's fight back...kind of an endless cycle.
If it's still showing issues, don't live with it. Make Ford fix it.
It's under warranty so I'll continue to monitor the problem.
Although it's a very slight difference at times.
#9
#10
Thread
Thread Starter
Forum
Replies
Last Post
AzPete
1999 - 2003 7.3L Power Stroke Diesel
52
11-21-2012 04:47 PM