Rough idle when damp
Thread Starter
Instructor
Joined: Jul 2004
Posts: 130
Likes: 0
From: Naples FL
Rough idle when damp
I have a problem with a rough idle when it is damp/heavy humidity out.
The idle will eventually smooth out as things dryout under the hood. I have changed the IAC motor but that didn't help. Any thoughts.
The idle will eventually smooth out as things dryout under the hood. I have changed the IAC motor but that didn't help. Any thoughts.
Melting Slicks
Joined: Feb 2005
Posts: 2,135
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From: Sebastian Florida
St. Jude Donor '06
Are you throwing any codes?
I live in the rainy state, AKA Florida and I read a post about people having your problem had opti issues. Also, humid weather and rain also help electricity conduct. Check plug wires, coolant temp wires and MAF plug for good connections, then check the opti last, as this is a real PITA.
I live in the rainy state, AKA Florida and I read a post about people having your problem had opti issues. Also, humid weather and rain also help electricity conduct. Check plug wires, coolant temp wires and MAF plug for good connections, then check the opti last, as this is a real PITA.
Thread Starter
Instructor
Joined: Jul 2004
Posts: 130
Likes: 0
From: Naples FL
I replaced the opti last summer but did not do the wires. Also, once I crack the throttle the engine smooths out and runs as it should. Under acceleration there is hesitation, mis, etc. just strong acceleration. I was thinking the IAC is bad and effected by the weather. I also live in Florida and we have had rain all day. It has been idling crappy all day.
Advanced
Joined: Jul 2004
Posts: 80
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My money would be on wires, too. I watched a dealership spray water on secondary wires from a spray bottle while the engine was at idle to determine whether they were good or bad - worked like a charm. If your wires need replacement, the engine will stop. My $0.02.
