I have had 4 Honda's that i have swapped over the coarse of the last 4 years. and I ended up sell all 4 of them because they all had idle issues, and i chalked it up to My Stupidity when it can to cars, and so i stopped swapping for a while.

Well Im glad to see im not the only one who makes stupid mistakes. lol

The wagon i picked up had sever idle issues with the B20 it came with.
I cleaned the IAC, FICV, TB, New PC bleed and rebleed and rebleed the cooling system, still no luck.

Turns out when the previous owner did the B20 swap, he deleted the charcoal canister. and when he did that, he ran a vacuum line from the TB to the Evap Return Line on the fire wall..... 3 shops looked at my swap and nobody could tell me why it was sooooo erratic!@!!!!!!

I was essentially giving my car a controlled vacuum leak of a Fuel vapor, the entire time it was running, instead of allowing the Gas tank to vent properly.


If you have erratic idle issues that you just cant solve, make sure to check that!!

 

Trial and error. The only beauty of getting older, you learn from your mistakes. Pix of your wagon?

 

Funny. You checked all sensors when there's more to a car than sensors
Say....vacuum which is not measured by a sensor
Live and learn

 

Quite on the contrary. Vacuum is super important and measured by the MAP which is why Idle gets tricky.

 

Yea you are correct.
But he didn't mention map. Just have maf, which doesn't measure vacuum leaks.

 

B series engines never came with MAFs.

 

Hahaha I meant iat sensor
Always get those confused.
My apologies

 

i too would like to see pics of the wago

 

can't agree more.

 

Cant believe I never replied to this! Sorry guys!!!! Here some pix as she sits.