elior77

Hey,

After a VVT swap on my friends car he drove some time with the NA throttle body + NA TPS and IAC, we tried switching to NB throttle body + TPS and IAC, IAC is no problem, the TPS is wired correctly asaik but does not work right - I can calibrate it but it will not function well when the engine is on.

I tested on the NA TPS and I do get 0-5v reading on the signal wire, on the NB TPS I get mv uptp 1-1.5v~

Anything I miss about NB TPS on NA harness + DIYPNP ?


Thanks
Elior

WestfieldMX5

What did you do to get -342 cats?

Check the wiring, do you have 5V on the tps feed?
Do you have continuity on the signal wire between tps and ecu?
Is the tps working correctly (measure resistance)

elior77

I'm doing my projects not as all the gods here prefer - they don't like it.

I have 5v on the tps
The harness works fine with the NA TPS
I tried 2 NB TPS - I will check the ressitence.

Thanks

Neilv

iTrader: (1)

On my AEM EMS the NB TPS (in a 1.6 chassis) ranges between roughly 0.25v and 1.6v. Tried multiple sensors and the same on all 3 of my cars. Works just fine as is. If you find a solution please post it up here.

elior77

Does it woרk fine or do you need a solution ?

In my case it does not work fine - on a DIYPNP.

Neilv

iTrader: (1)

I've been driving my cars like this for 2 years now. No issues for me. But I also had to move the signal wire from 2L to 2M (1.6 to 1.8) location on the ecu plug because VTPS. This is on AEM so i'm not totally sure about MS but so far its working for me.

Also I ran the Auto 1.6 TB when I had a 1.6 in my car. IIRC I did get 0-5V

PAdutch

I was having issues with my swap before using the NB2 TPS. Turned out I had wired it wrong per some diagram I found somewhere. The proper order is:

Car ------> NB TPS
Red -------> Light green / red stripe
Light Green/ White stripe -------> Green/Black Stripe
Black/ Light green Stripe --------> Black/ Red Stripe

At least that's what worked for me. 'Im on a MSlabs MS3.

hi_im_sean

iTrader: (3)

Why do we continue to make a simple 3 wire pot so fuking hard on this site lately? ecu sends 5 volts out to an element, the other end of element gets grounded, the wiper is the signal back to the ecu. What is so hard about this? I have been watching people swap every combo of these 3 wires struggling to get their VTPS working without giving one *** about the "theory of operation". One even sold his car because of it. JFC /rant

DrKarrot

Agreed. This is really elementary stuff. I am floored that people attempt standalone ECU installs, turbos, etc if this is beyond them. Straight outta the Google box:

If you're not sure which connection on your TPS goes to which wire, check it with an ohmmeter/multimeter. Observe the resistance as the throttle opens and closes. Each pair of pins will behave differently:

• The resistance between the 5 volt and ground pins will remain constant.
• The resistance between the ground and signal pins will be low with the throttle closed and high with the throttle wide open.
• The resistance between the 5 volt and signal pins will be high with the throttle closed and low with the throttle wide open.

All this bullshit about which color wires goes where just serves to confuse people, compounded by the fact that the kind of people who ask for help on installing something as simple as this probably have no idea what they're doing.

PAdutch

While I agree that this should be able to be figured out by someone installing stand alone etc. It is nice when someone else who has done it before post clear instructions to follow. The whole VVT megathread comes to mind. I know I appreciated having step by step instructions instead of figuring everything out myself.

elior77

As far as I know I tested the pins correctly and did not get 0-5v change... on another NA ca the TPS is connected with the same wires and give a normal 0-5v, the NB TPS give mv upto 1.5v~, I'm not the only one getting this results.

I'll check again and verify the resistance.

curly

iTrader: (25)

StanTheMan

I'm a clown when it comes to wires & electronics.


That doesn't mean I can't tune an aftermarket ECU. one that plugs straight into the harness.

I manged to get the wide-band working. because it comes with clear precise instructions

Ive stuggeled with a few little things. Like the NB1 TPS on a NA6 chassis

it should be straight forward....
the NA6 harness is the same for everyone. so would the NB1 TPS.

which wire goes where.

just because you understand it. doesnt mean anyone else can understand it. You have a skillset I don't posses.

Ted75zcar

iTrader: (2)

For correctness, the NA6 is NOT the same for everyone. The auto and the manual are different.

DrKarrot

You can do it. If you can successfully tune a car you can figure out a TPS install. Just tuning a nice stable idle is an order of magnitude more complicated than the inner workings of your TPS. The basic principles behind a potentiometer and voltage/resistance can be learned from a 5 minute YouTube video and will pay dividends as long as you're messing with cars. I dont claim to know anything serious about wiring or electronics but the few things I do know I learned in a matter of minutes and have saved me countless hours and a serious stack of money.

StanTheMan

indeed you are right.

my bad.

Savington

iTrader: (31)

Literally the only thing you could possibly **** up when putting an NB TPS into an NA is the wiring, so if you claim it's done correctly, I claim you are lying.

WestfieldMX5

wrote something here, but can't seem to delete, only edit

StanTheMan

I haven't actually done the TPS yet. Ive played with it but not getting any reading,

but you can run the MS2 without TPS. sure not as good. But one day I'll get enough courage to perhaps jut put 1 wire in the middle....& do the 27 different possible combos until it works

Savington

iTrader: (31)

On the NA6, it's a little different because on the manual cars there is no 5v reference at the TPS connector. You need to add it yourself or have an ECU which passes 5v up one of the existing wires (such as an MSLabs MS3 Basic) and then wire the new NB connector properly.

On the NA8, it's as simple as changing the pigtail, since 5v is already there by default (and thus every aftermarket ECU worth owning also sends 5v there).