We bought an 05 rx 8 that the car is In limp mode, we have replaced all fuel systems and catalytic converter. How fo we get it out of the limp mode?

 

99% of limp mode cases are the OMP. The other 1% is coolant temp sensor. Are you sure it's limp mode and not other loss of power?

What do the OBD codes say?

 

P0037
c2778
that's what my husband sent me yesterday that the codes were that was on the car. Thanks for replying 🙂

 

0037 is your downstream oxygen sensor, should be a straightforward replacement and wouldn't cause limp mode.

C2778 is something to do with steering angle sensor? Might turn off your DSC/power steering but won't cause limp mode..

What symptoms are you experiencing?

 

My symptoms are very slow revs up to 4k and won't go past. And barely make it up a Hill. Other then that sounds good and runs good.

 

What’s the level of your oil, if it’s 1st series and your rpm over 9k It could have soaked your intake with oil. Check your intake, clean it, clean filter and clean maf sensor. Reset your ecu. I have series 1 and only fill to the middle mark solved my problem also added a oil catch can.

 

try it in neutral, if same then it’s likely in limp mode. Then pull intake tube off so you can see the throttle body blade and then with the key in the ON position either have someone push the throttle all the way down or use a brick etc to do same. If the throttle blade isn’t fully open then likely so. There could be other issues though since it’s an electronic throttle.

Then, do you have any way to check for codes? Most issues will store CEL codes, but not the OMP position sensor in certain conditions.
.

 

I fixed it. The very hard drive pushed oil passed the oring on the block off plate between the Omp and the engine. The oil then ran down into the harness and onto a bare wire. Boom limp mode. Cleaned up wires resealed block off plate and relocated the Omp up beside battery.

 

guess I’m not familiar with what mods you’ve made to have quit using the OMP? You must be premixing then?
.

 

Yeah I think that’s what he posted in the thread, honestly for a few 100 bucks it’s worth getting a sohn and premixing on top of it. I use about 5-6oz per tank while using the sohn adapter. Engine seems to like it and I have minimal smoke

 

Ya I have been premixing only with this build. It's never had the Omp on it from day one. But it was in its place in the past with a block off plate. But I recently moved it up there away from the wheel. The engine is doing good. Well as good as it was when I got it built by a local company.

 

not sure when the noobs are going to finally figure out what a waste of money buying and installing a Sohn device is.

 

Offtopic, but I'd like to dig into this. It has made my life easier by leaving high quality synth in the pan where it belongs and running two stroke that I can replace easily through the oil injection system. That alone is worth $100 in not burning expensive oil over the life of the car. Does 2 stroke oil perform better than engine oil in the injection function? Who knows. I don't think it can be worse though?

 

… have you ever considered that a typical 2-stroke exhaust stream runs 650°F or more cooler than a Renesis and also much stronger oil ratios than a cat converter will tolerate?
.

 

What if you run catless?
Could there be a possibility it's beneficial then?
Serious question.

I'm not sure after talking to Kyle at The Rotary Doctor if I want to install the new Sohn bundle I have.
He's not convinced either.

To be honest, I always thought keeping that little reservoir topped off could be a pain.

 

The Sohn doesn't change the injection rate or how much oil the cat sees. I would argue that (JASO FD) 2 stroke throws less at the cat than engine oil does. The definition of JASO rating is a certain low threshold of exhaust ash and byproduct content. Later API ratings for engine oil also dial down inorganic additives, so sure, maybe they're in the same ballpark if you're using synthetics. Certainly not if you're using mineral engine oil.

Exhaust temp : why is this a factor? In both cases oil doesn't survive the exhaust stream. It's hundreds of degrees above flashpoint.

 

maybe you should instead attempt to put things away in your heart and ponder upon them more.
.

 

Again with the pointless, unhelpful comments.
No one wants to hear them.
Ponder that.

 

Annnd Team is out of arguments

 

you do err; it’s not that I don’t have anything to offer, but rather recognize when the labor of working it isn’t going yield any fruit:





and such words only prophesy the truth of your own intention; you only seek an argument for the very sake of one, and as the replies also do confirm; what God closes no man can open.
.

 

Heh. Ok. You made an assertion to which I had, what I feel are, legitimate counterpoints. This doesn't need to be an argument, we could talk like people, but it appears your responses demonstrate a desire to lecture rather than discuss, so good day sir.

 

I’m cat-less and through my experience with the 8 I much rather focus on topping off a reservoir then the oil in the pan on a series 1.

 

Hello I'm catless and do not run a Sohn. Or an Omp for that matter. Completely dependant on 2stroke mix in gas tank. The Sohn is gravity fed which means in hard corners or acceleration it can slow down the feed of oil. Also as mentioned the Sohn doesn't increase the feed rate. It just replaces the source. But a premix is an increase if you think about it. It's getting oil even at idle. 😉

 

and some people will never come to admit to their placebo addiction.

you’ll never see a Sohn on any rotary engine I ever run and if it wasn’t for rules compliance reasons I would have been doing the same thing you are from a long time ago. Some people still believe that old wives tale about premix and Renesis not being compatible.

 

dude, I still premix .5 oz/gal , oils good from all angles. I premix the FD too it’s oem plus