I searched first didn't come up with a final answer.

Problem started after I jump started my car because I left my LED interior light on for 4 days. I didn't notice my ignition was in the on position when I hooked up the cables between my ford van(high output alt. for all the equipment I have to use at work. I've jumped many cars off with this van with no issues.)

After my car warmed up like normal (idling at 800-1000RPMs) it started to rev up to about 1500-2000RPMs and then down to about 500RPMs then back up and so on. The car runs fine while driving or if you give it a little gas.

No CEL but was flashing a 7 and a 14 from previous trouble shooting. cleared the codes and they haven't came back. swapped ECU for a known good one with no change.

If I unplug the IACV it reves up and down faster. if I unplug TPS its goes normal. I checked the voltage coming from the plug to the TPS and it has 7V. My honda service manual says to hook up a test harness and check voltage but I have no idea where to get this harness. Also I sprayed carb cleaner at all vacume leak areas and no change in idle.

Can anyone give me some advice to get this problem solved?

 

bump for a little help.

 

Sounds like you have a vacuum leak. Check all vacuum hoses very carefully, might want to get a small hose to listen aroound and see if you can find it, oro some soapy water. Search for ways to find vacuum leaks and you should be good

 

I've sprayed carb cleaner at all joints and vacume lines and no leaks where found. all intake gaskets are new as of about 4 mouths ago. its just weird this started right after I jump started it.

 

you might have bumped a line or two and it could have cracked or slipped off the joint. I would put money on the fact that its a loose vacuum line

 

The thing is My battery is in my cargo bin behind the passenger seat. I never opened my hood. But I'll recheck everything tonight when I get back home.