Map sensor reads high on NSP Haltech
 

Trying to figure out why map sensor reads high on NSP 1500. Reads 3 psi with engine off. Sensor says 1.45V
At say 15 inches of vacuum it is pretty close to manual dash gauge.
Don't want to be off once tuned for boost.
I have noticed some of the available wire inputs have small voltages fluttering on them when selecting connections.
What might going on? Is this normal?

Have you considered going to a professional engine calibrator?

You're using an external MAP Sensor with an improper 2-Point Voltage Sweep, which is why the reading is incorrect.

On the Elite 1500, you can plumb in the integrated unit with a vacuum line and set it to "Internal MAP", or properly calibrate the external one that you have there.

Reach out if you end up wanting that professional help.

Send me a PM, I can help you out :icon_tup:

Steve

Under the Map Sensor I see a map filter scale and derivative filter...

Sensors>MAP Sensor

You'll see a voltage compensation for AVI9 if Analog and set as default wiring.

Otherwise you'll see On-Board MAP selected and the Haltech nipple is used.

You should NOT be doing this yourself if this is tripping you up. Reach out to a tuner.

I switched the map sensor to on board and it reads in vacuum now -2.5 psi/inHG and -1.5psi
Seams about right for 2700ft altitude, yes ?

Yes. I just hope you aren't running on a Haltech basemap. There are countless intricacies that even "experienced" folks don't understand in this software and you would be doing yourself a disservice.

Yes, built on base map.

This VE and O2 correction is way better than the old injector based maps on e6k.
She fired right up and not too far of target lambda.

Thanks for everyone's help.

For the remote chance someone else goes through this.
The old haltech map sensor doesn't work with new ECU without correction-----just use the new on board integrated pressure sensor.

That's not true at all, and misinformation.

Factory MAP is on AVI9 and works perfectly.


https://cimg6.ibsrv.net/gimg/www.rx7...9e53c5447d.png
https://cimg9.ibsrv.net/gimg/www.rx7...3bb09a76ec.png

@GucciBravo your post was reported as advertising so I had to edit it. One of the mods previously banned you for that. I mostly like your posts but either don't advertise your services or become a vendor. It's not that expensive.

I refuse to become a vendor for this forum and am openly sharing information on here to help others.

Would you rather see misinformation being spread rampantly and hearing of another "unreliable" Rotary Engine?

The pushback here is incredible. Why don't you put this same energy to help others instead?

If you don't want to be a vendor here, then don't post links to your business website promoting yourself and don't use the forum resources to solicit sales.
I'm happy to see you sharing good, honest information. You are also doing so in a salesy manner trying to promote your business. Case in point:
Least you could do is throw IB a bone for providing you a platform to advertise and sell your services.

The community here does a good job of dispelling and challenging misinformation. This isn't the FB crowd.

What pushback?

I do help the community. Everyday. Without remuneration of any sort.
No reason to be rude in response to my rather polite original comment.

^^geesh, get a private room for that off-topic chat :suspect:

to the OP; you just need to calibrate the setting in the ecu, a good pressure gauge and a hand type pressure pump gun (like a mityvac except for pressure rather than vacuum), pump the pressure up on the MAP sensor to your target using the pressure gauge, then adjust the ecu value to match.

IMO anyone running a performance turbo engine should have the tools for this in their personal arsenal. It’s something that ought to be checked once in a while. Because you also need to be checking it against the MAP output calibration sheet to make sure it’s within target there as well and not the issue.
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Nah, I find it's best to make some of this public for various reasons:
- transparency
- re-communicates forum rules and standards of behavior
- everyone is informed about the forum rules being applied

If his behavior persists and community members complain about it, he'll get banned (again) and the community is aware of why. Puts an end to the conspiracy theories of why someone was banned. Having a public discussion addresses this. I get a kick out of reading some banned member's FB posts about how they were banned "for no reason" when the truth is they scammed people out of money, didn't ship products they sold, misrepresented products etc.

For the record, I'm not the one who banned him originally. Nor do I intend to ban him again. I rather enjoyed his build.

I wouldn't mind knowing who reported me as to deal with them privately (do not publicly post that, as I feel it's a violation of confidentiality).

Everyone has access to my personal email, cell phone number, and whereabouts, in the scenario they'd like to reach out if they're ever feeling wronged. I live and breathe fixing these cars so much that I don't make time for building my own, so if someone feels wronged, I'd like to correct that.

What I see is that directness does not bode well in this community and my previous attempts to save others from pitfalls that I've experienced has lead me to a villainous role. So be it. If I save folks from making the same mistakes I did or avoiding shitty shops, then so be it. I'll take on that role.

So when a thread like this comes along and it's a two-second fix, and I offer multiple resolutions to the issue throughout a week-long span, this showcases to me the person's ineptitude to be performing the task at hand. I reiterate 'PROFESSIONAL HELP', because that's exactly what the vehicle will need to maintain an air of reliability.

We talk about advertising on here, but is anyone doing the decent thing of upholding quality standards for their sponsors? This brings me back to the Adaptronic days where their entire dealer network was full of idiots who couldn't tune a car to save their life with not even basic understanding of the software.

I can reply with specifics against who is paying IB their $75/mo+ monthly dues and their business practices in the real world, but again, this will further villianize me. I'm not looking to make a profit off of saving these cars, simply not see so many of them get stuck shop to shop for years of waiting, only to be hack and slashed together in some rush attempt when attorneys get involved.

There's a point earlier this year where I met my breaking point, and believe me, I'm just about done with this.

The last few years I've devoted to tuning cars internationally and developing a future-proof, real air mass measuring ECU and harness package with drop-in tune with the precision of +/- 0.002 Lambda everywhere, moving the entire Rotary Community into the Motorsports Grade world. I'm 90% done with the package now and have gotten it down to Haltech Nexus R5 pricing with full harness AND tune, but am this damn close to saying 'f-it, y'all don't deserve my efforts.'

I'll go work on my car. Finish it. Show the proofs of concept. There's no reason to throw countless minutes and hours a day into an unappreciative sector of industry.

Regarding the MAP sensor, I agree with TeamRX8 that a MityVac tool would be a good idea. I would measure voltage at all three sensor wires to make sure the 5V reference power is actually 5V, sensor ground voltage is reasonably close to the battery ground voltage, and the signal voltage reported by the ECU is reasonably close to what you measure with a multimeter. The goal would be to determine whether your original calibration values were wrong and should be changed, or if you are trying to mask a harness problem via software adjustments.

I have a different communication style than GucciBravo/RghtBrain, but I appreciate that his tech info is usually good. It's hard to find other people who tune so many cars and are still willing to share info.

I still have an old school manual autometer boost gauge on the dash as my back up.

That in itself was fine initially, but then failing to recognize having travelled well beyond those way points by a considerable distance is the true reference.

It’s just as the great prophet Jeremiah stated, “the heart; deceptive above all and exceedingly wicked, who can know it?”. Because we often fail to recognize what it is that drives, and often misleads, our heart … that is, our ego.

Continue to display the full nakedness of it in public if you must …
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