1999 Dodge Caravan High Idle

DODGE CARAVAN
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HSHESS
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  • 1 POST
I have a 99 Dodge Caravan with 138,000 miles. The engine is a 3.3L with Flex Fuel. I just changed the Spark Plugs and Wires, however after I put everything back together and cranked the van it now revs up to 5000 rpms. It will go higher if touch the accelerator. I have checked all of my hoses and believe that they are back in the right spots and the spark plug wires are in the correct firing order. Is there anything else that will cause this to happen?
Mar 23, 2007 at 4:17 AM
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PRIMO
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I exerienced something like this before in another vehicle. I found that a sensor connection had came loose. Check your sensor terminals, especially on the oil pressure sensor.
Mar 24, 2007 at 7:35 AM
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MERLIN2021
  • ✓Experienced Mechanic
  • 17,250 POSTS
You might also check that one of the plug wires didn't stray into the throttle area...
Mar 31, 2007 at 3:58 PM

Suggested Repair

Inspect the spark plug wires and confirm none are routed into or against the throttle area, where a wire could hold the throttle open and cause a very high idle.

Conversation Summary

A 1999 Dodge Caravan with a 3.3L flex-fuel engine began revving to about 5000 rpm after the spark plugs and wires were replaced. The owner checked the hoses and firing order. One reply suggested a loose sensor connector, especially at the oil pressure sensor. The expert advised checking that a plug wire had not strayed into the throttle area.

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