Car ForumAnyone know what a rough idle could mean?Posted:

HTTK
  • Gold Gifter
Status: Offline
Joined: Jul 25, 20143 Year Member
Posts: 2,473
Reputation Power: 307
I drive a 2007 Ford Mustang 4.0 and noticed a rough idle. By rough I mean shaky and loud vibration.

Sounds a bit like a power surge.

My rpms stay at a steady 750 and I just replaced the entire clutch assembly.

Im thinking maybe spark plugs are causing it?

Any thoughts?
#2. Posted:
M3
  • Gold Gifter
Status: Online
Joined: Jan 01, 20134 Year Member
Posts: 1,085
Reputation Power: 105
Motto: CLOUT GOD
Is there a CEL?
#3. Posted:
HTTK
  • Gold Gifter
Status: Offline
Joined: Jul 25, 20143 Year Member
Posts: 2,473
Reputation Power: 307
F80 wroteIs there a CEL?


Nope no lights on the dash
#4. Posted:
Status: Offline
Joined: May 29, 20107 Year Member
Posts: 3,982
Reputation Power: 701
Motto: I AM THE REAL TAYLOR. THE OTHER GUY WAS A TOTAL WEEB YA YEET
Misfire possibly?
#5. Posted:
M3
  • Supporter
Status: Online
Joined: Jan 01, 20134 Year Member
Posts: 1,085
Reputation Power: 105
Motto: CLOUT GOD
HTTK wrote
F80 wroteIs there a CEL?


Nope no lights on the dash


injector(s) could be stuck open. could be wet plugs.
#6. Posted:
CWL
Status: Offline
Joined: May 26, 2017
Posts: 66
Reputation Power: 2
Check for wet plugs, if not that, then check transmission and brakes
#7. Posted:
Status: Offline
Joined: May 29, 20107 Year Member
Posts: 3,982
Reputation Power: 701
Motto: I AM THE REAL TAYLOR. THE OTHER GUY WAS A TOTAL WEEB YA YEET
CWL wroteCheck for wet plugs, if not that, then check transmission and brakes


Brakes for a rough idle?
Could you explain this to me
#8. Posted:
CWL
Status: Offline
Joined: May 26, 2017
Posts: 66
Reputation Power: 2
Sundown wrote
CWL wroteCheck for wet plugs, if not that, then check transmission and brakes


Brakes for a rough idle?
Could you explain this to me

Mine were loose and the break cylinder was snapped in my old durango
#9. Posted:
JZX
  • E3 2017
Status: Offline
Joined: Apr 14, 20152 Year Member
Posts: 2,573
Reputation Power: 159
Could be anything related to air, fuel or spark.

An easy check would be to inspect the spark plugs, check the condition of the spark plug but also look at the ceramic coating to see if you can see any cracks. Cracks usually have a burn mark on them so you should be able to spot them quite easily. The spark could be jumping out the sides not giving full spark to the cylinder.

Then trace it up, test the HT leads or coil pack.

Check the throttle bodies aren't getting stuck in a weird position at idle too.
#10. Posted:
Aiirzlx
  • Gold Member
Status: Offline
Joined: Dec 10, 20124 Year Member
Posts: 210
Reputation Power: 17
Motto: Live simply so others may simply live
Could possibly be a misfire. my first suggestion would be to check the spark plugs and see if they're looking good. Most common cause for a missfire is Coil Leads or Spark Plugs.
Users browsing this topic: None
Jump to:


RECENT POSTS

HOT TOPICS