Hiccup coming out of boost into vacuum.

biggreen96 · Post by **biggreen96** » Fri Jan 26, 2007 10:56 pm

I recently installed a vf39, 440's and front mount onto my 93 legacy turbo wagon. I'm adjusting fuel with a HKS super afr.

The hiccup/fuel cut (I think this because my wideband goes lean for a split second afterwards) happens every time I go past 0bar (even just to .01bar on my apexi avcr) and come back into vacuum. its very noticeable, passengers think my car is breaking.

kawikid20o2 · Post by **kawikid20o2** » Tue Feb 27, 2007 6:49 am

i had this, after resetting the ecu it went away.
I was tuning with a emanage blue, same issue though.

biggreen96 · Post by **biggreen96** » Tue Feb 27, 2007 6:51 am

ok cool I will give that a shot.

kawikid20o2 · Post by **kawikid20o2** » Wed Feb 28, 2007 4:05 am

fingers xed for ya

biggreen96 · Post by **biggreen96** » Fri Mar 02, 2007 3:08 am

arg didn't work.

kawikid20o2 · Post by **kawikid20o2** » Sun Mar 11, 2007 7:55 pm

sorry bud...got nothin else for ya.

Post by **DLC** » Mon Mar 12, 2007 8:54 pm

I want pics of my old car with an FMIC!

turboleg · Post by **turboleg** » Wed Mar 14, 2007 12:24 pm

Are you using the stock pressure exchange solenoid?

Mine acted like it cut fuel just before or just at the point when I came from vaccum to boost. If memory serves I tested the solenoid and found it to be bad...replaced it and it worked fine.

It's a funny look you get from passengers isn't it?

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Hiccup coming out of boost into vacuum.

Hiccup coming out of boost into vacuum.