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b20 vtec idle issue choking up please help!!!

Old 07-28-2013, 05:01 PM
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Default b20 vtec idle issue choking up please help!!!

I have in my integra a n/a b20vtec build. B20z block and gsr head with b16 cams 11.2.1 compression valve train all that. I have a victor x edelbrock mani with blox 70mm tb and new fuel filter/fuel rail/injectors. The issue I'm having is on going but 1 out of 5 times I drive there is no issue but mostly it is ongoing. The issue is that when I sit at idle my car*idles at 900 but will consistently drop to 100 and jump back up to 900. The lights dim when this happens and it happens at red lights and whenever idling. Sometimes it does it sometimes it doesn't. Also while driving it will do the same thing only it will go from 3000 rpm to 100 then shoot back up. Like it chokes for a second then releases back. It jerks the car back for split second. I have cleaned iacv and bled my coolant for air bubbles. I ordered walboro 255 fuel pump today as well. I don't think my intake mani has an fitv. Any ideas guys? Please help!
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Old 07-28-2013, 05:53 PM
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Default Re: b20 vtec idle issue choking up please help!!!

What ECU are you using, and have you got tuned? A "base map" doesn't count. That's not a tune, that's a basemap.
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Old 07-29-2013, 06:18 AM
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Default Re: b20 vtec idle issue choking up please help!!!

Hondata s300 tuned by millenium
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Old 07-29-2013, 06:23 AM
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Default b20 vtec idle issue choking up please help!!!

Vacuum leak? Injector o rings?
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