Ok ladies and Gents i have a 1990 Acura integra DA w a jdm b20 swap and it has a pretty bad idle, it doesnt idle to high or anything but it fluctuates up and down ( its worse when its still cold it will idle all the way up to 3500 ) but it doesnt do it as bad when it warms up

things ive done to try and correct the problem
1. Replaced the TPS sensor and throttle body
2. Checked every single vaccum line and they're all fine
3. Took off IAC valve and cleaned it thoroughly twice
4. ive even checked my coolant to make sure there wasnt any air bubbles in my coolant cause ive heard that would do it!!

What else is left to do ? PLEASE ANY HELP WOULD BE GREATLY APPRECIATED!!!!

 

Did you do anything with the FITV yet?

 

no ive heard someone tell me something about that but i dont know what it is and how i would fix it !!! If you could give me some info it would be cool..

 

I had this same problem a few weeks ago, I tried everything, I found the problem by spraying brake cleaner around the intake maninfold while the car was running and it killed the engine, So I had a bad manifold gasket

 

im gonna try that..thanks man...anything else i need to try ?

 

also try a different ecu one that you know that works fine

 

k thanks i'll try that also !!!! what else can i try??

 

make sure you have your TPS set to 0.5 volts and 4.5 volts at WOT.

 

it was already on the Throttle Body so i just assumed that it was already set should i try and reset it ? thanks for your response anymore ideas

 

any electrical diagnostics with your iavc? tps do not have to be set unless they've been taken off before. pay more attention right now to your iacv for correct voltages and cleanliness and throttlebody gasket for leaks.

 

Make sure the coolant system is bled really well. Make sure you didn't connect the IAC with the plug for the IAT and vice versa. Seeing as it gets better when warmed up could be a sign of intake leak that closes up when hot allthough the engine will run richer when cold causing higher idle.

 

thanks for all the help everyone !

 

you can adjust your throttle cable and see if that works.

and take your throttle body off and clean it with brake cleaner REALLY well.

 

could it be something super serious like internally at all im just wondering

 

^^^

 

not sure how hondas work but my toyota was acting up like that and here when i got the motor swapped my timing was advanced by a tooth. now she runs good.

 

my cousins honda was acting like that too and it turned out to be his fuel pump. his is the 96b16sprayin i put a post earlier about it and when he got it checked out that was the problem. not sure about yours but something to consider

 

ok thanks for all the info everyone looks like i have some work ahead of me

 

Some shop will do a scan for a vehicle for a cheap prize just to get the fault code and fix it by your self, this purpose is to save time or stop guessing for fixing problem. I'd read it from some of advertise or do a search.