omni 4bar failure

Pretty sure my sensor just bit the dust.
I've only have it a few seasons, has anyone else had one fail?

I have it mounted on the bottom of my jmf. My tuner said it should be fine to mount to the manifold.

I recently started spraying a lot of meth 50/50. Any chance gravity would have played a factor and dropped down into the sensor and buggered it up?

I probably wouldn't mount it on the bottom, even with a turbo thats in 100% condition or if you have a recirculated catch can, small amounts of oil vapor still make it into the manifold. I know meth can shorten the life of IAT sensors, not sure about maps.

Not sure if they are also subject to issues from vibrations that some oil pressure senders are but for that reason I like the gm style sensors that are plumbed to the intake with a small amount of hose.

It worked flawlessly for the past year or two in that location.

I just started spraying meth at the track on Friday where I got some jitters and the log showed the faulty map readings.

And this happened just after a pull I did... Took maybe 5 min and the car died.

I had to resale my map to make it home, but seemed like it started coming back to life half way through the drive...

I don't feel like dropping 160$ on another one, but also don't feel like dealing with this enroute to the shootout.

I'll check it out tomorrow and try mounting it on the firewall with a piece of hose, and post an update.

I called Omni Power

I am told that the sensor is fine in the location it is in, he said it could possibly SLIGHTLY lower the life of the sensor, but moving it to an upright position is really splitting hairs.

I was also told guys have been spraying meth at these things for years, they are completely fine.

Also I was told, the usual failures on these units are from cars with solid mounts where extended serious vibration would knock a solder joint loose.

A new sensor is being sent my way.

A+ for these guys

i had the same problem with my sensor, 2 years worth of meth injection and the sensor went bad. i guess the sensor was not really designed to be used with meth. my sensor is 2 inches off the intake on a vac hose.

Paul, is that the new location of your sensor?
Or is that where it was when the sensor failed?

Same as before. if it last 2 years im ok with it

From my experience, MAP sensors should always be above the intake manifold, so that gravity does not let any fluids sit in it. My old VPC had a map sensor filter and instructions stated that it needs to be installed above intake manifold.

I've had my Omni 4 bar mounted on the top part of the firewall for years now with no issues. I spray meth and have my PCV valve re-circulate oil back into the intake.

Never had a MAP sensor problem here.

Reza, do you have it plumbed to the bottom on your intake though, and the sensor just mounted above the intake? (not sure what you are running)

My JMF only has ports on the back, which keeps things clean, but IMO sucks for convince sake.

I'm running a stock intake manifold, plumbed off one of the top ports. I was running a JMF intake and it was plumbed off the bottom port with no issues.

I would run a little fuel filter to it to catch and fluids if your worried about it getting damaged again.

Will do,
Thanks!

Well I just had another failure,

Reza, I tried a filter inline before the shootout last year, but it changed the way the car drove, I didn't want to frack around with the tune anymore.

This time it was hard to catch the problem. Finally, With the engine off, noticed the sensor was reading 12KPA lower than it should be at atmospheric pressure. My STFT's were maxing out at idle and 2500 when I was trying to do an etest. Odd thing was, the sensor still worked, it would sweep throught the ranges as I drove the car.

Swapped in a spare. BAM 99KPA, back in business.

I had one failed on me also after about 3 years of use. It was a GM3bar not Omni mounted to FW with hose above IM. I was getting random jitters (including few violent that felt like fuel cut) in boost and few times it stalled my dsm while cruising. I replaced it with omni 4bar that goes into stock mdp location on 2g IM. Jason D was helping me diagnose the issue but we end up just replacing it.

Are you planing to take yours appart to inspect signs for failure?

Still no issues with the Omni 4 bar I'm running, MDP style, with an adapter and push lock hose connecting to the manifold, it's zip tied to the wiring harness, not directly mounted.

I know some oil pressure sensors don't deal will with vibration, I wonder if this may be a factor here.