Stock short block, stock head, just the cams and springs. I even have stock intake and exhaust mani's, and a stock TB. The higher curves are the high boost tune. Lower curves are 23psi road racing map. Red is power, blue is torque.

 

What symptoms did you have that showed your Map sensor when bad. I just got a replacement and having some idle issues i've been chasing for a few weeks

 

Oh it wasn't really idle related, drive-ability was..... horrible to say the least. AFR would fluctuate from off the scale rich to off the scale lean, sometimes with complete injector cut. My tuner logged it on like 400 ft of road and it was ridiculous how much noise the sensor was showing, sometimes even vacuum levels that were impossible.

In similar news, I swapped out the new Omni for another new Omni..... same issue, perhaps worse now

 

How new is your new Omni? I spoke on the phone with Omni yesterday, and they have just started producing a new 4-bar that they hope will be free of these issues.

 

The newest one I just ordered last Thursday, the one before that was maybe a month and a half ago. So Omni have started making new ones or they have been for a while?

 

Any idea when those will hit shelves?

 

I've had so many issues with multiple omni 4 bars over the years that I refuse to tune any cars with them anymore.

 

What's your recommendation?

 

For most, OEM 3 bar is fine. It's good to 30psi +/- 1psi.

For the big builds, then unfortunately Omni is the only current solution.

 

Just started a week or two ago.

OMNI has them now, but I don't know about resellers.

OMNI told me that they only see issues with their 4-bar in Evos. Are you referring to Evos or a variety of vehicles?

 

Sorry to thread hijack for a second. Mrfred, your message box is full so I can't respond to your recent PM.

Also, thanks for the update. I might give them a buzz to try one of the new ones to see if it smooths some things out.

 

Evos.

 

Try now.

 

I've had an Omni 4-bar in my car for 2 years now, no issues. Guess I've been lucky..

 

I guess we're getting a bit OT, but Aaron@ER who has installed a ton of these suggested to me that ~2-3% of their installed Omni 4-bar sensors have failed, so its real, but not huge. Perhaps he'll chime in on specifics. I carry a spare.