2005 Dodge Truck possible Vacuum leak ?

2005 DODGE TRUCK
25,000 MILES • 6 CYL • FWD • AUTOMATIC
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LORAINE66
  • MEMBER
  • 1 POST
At times the engines will rev up and down (doesn't die) garage cleaned out throttle body and intake lines but the engine still serges, found a leak with detector but want to be sure before spending on wrong area, maybee fuel pump?
Nov 24, 2009 at 6:16 AM
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MERLIN2021
  • ✓Experienced Mechanic
  • 17,250 POSTS
Get a can of spray Throttle body cleaner, start the car and spray around, pay attention to vacuum lines and manifold, if the idle changes, you found a leak. You want the engine running and spray on the outside but do direct the stream onto the hoses, if it is a vacuum leak, the engine idle will change speed, then you have detected a leak, repair the vacuum leak and see how it runs!

The other possibilty is the idle air control, it,s bolted to the side of the throttle body...
This is my leak detector!
Nov 24, 2009 at 6:30 AM
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