Have a 99 hatch just swapped a b20 in it drives fine but when it's warm sometimes dies and when coming to a stop dies at times what could it be ?? Some have said change ur fitv valve , and the igniter can cause that ??help

 

Check timing? CEL? Last tune up the engine had?

 

Pull intake.

Cover bottom hole within the throttle body.

If the RPM doesn't change when covered vs. uncovered...there is an issue with the FITV.

Same deal for the IACV (the hole on top).

 

No cel not sure on the tune up...
Will try the hole cover to see

 

And when I say cover the little holes, I mean use your finger.

There is a vacuum there, so you will know.

 

k thanks

 

There is a big issue with the ignition switchs in these things. If the things above dont pan out, check the ignition switch.

 

Ignition switch will cause this problem??

 

I cover the bottom hole and min change but the top it dies and when I unplug the iacv it does too what could it be??

 

 

well, if its a B20 swap, you should be on a tune.. what ecu and management system you using?