Hello, I'm new to the tuner world and ran it to a small snag. I recently purchased a 98 ITR with a JRSC. In order to pass emissions testing, I had to switch out the 440 fuel injectors and the Hondata300 back to the stock units. All was fine, passed inspection. I just put back on the 440s and Hondata ECM and now the idle is all messed up. When I start the car up it is idling at 1900 rpms. If I kick it down, the idle now pulsates from 1100 to 1900. The car seems to drive fine, but obviously, I did something to it.

Any suggestions on what I need to do to correct would be most appreciated. Thank you.

 

Vacuum leak at the injectors.

 

take out injectors and put a lil silicone around the rubber rings that they sit...also remenber to lube the injector o-rings with oil cause they break and leak fuel...

 

I'll give it a try. Thank you!

I did put on new OEM Honda O-rings. I also bought new OEM seat rings but didn't put them in becuase they were only half the size of the seat rings that were in there. Now I'm thinking maybe I should give them a try.

 

absolutely a vac leak somewhere, as said the injectors are suspect

 

Start it. Spray brake clean at injectors. Listen for engine to idle down. Leak found.

 

Well you were right. It was a leak at the injectors. Now that I put the new seat rings in and tightened down the fuel rail, the car runs like a champ.

Thanks for your help!