M35 Cable Throttle

[scotty nm35]

Since I bought the car, only one part has annoyed me, the throttle has a mind of its own.

I finally decided to install the EA cable throttle I bought for $50 and now have it all hooked up so im off to the tuners, hopefully before Easter to remap the emanage and take full control away from the ecu. I have no idea what the outcome of this will be but Cihan is confident he can get the bugger to shift etc, have to see how it goes.

I was trying to think which parts the ecu sends a load signal to. Fuel pump, line pressure for auto, Attessa, is there anything else? I will have to send a variable voltage from the emanage to replicate these signals and wire the fuel pump to constant 12v at a guess.

Should be an interesting mod with some great improvements in response if all goes well.

[Daleo]

Gutsy move Scotty, hope it works out well, I think it'll make a huge difference, throttle response is my only issue with the whole car. Even with stock power output it's a pain, at your power level it must be a huge frustration.

You're a pioneer, good luck!

[StealthX]

I did the same conversion in my X-Trail, I got fed up with that fvcking electronic throttle...

You're right, it seams to have a mind of its own, especially when it comes to idle...

I'm using an EMS stinger ECU which controls EVERYTHING when it comes to ignition and injection, so I didn't have to do anything in terms of electronics. Just installed the cable on the pedal and the throttle body on the intake manifold. No sensors, no wiring, I'm not even using a TPS...

Works perfect... needed a tough up tune cos the SR throttle was smaller than the other one, but that's it.

I'd highly recommend this mod if you are planning to do more in the way of engine computer and/or tuning later on. The fly-by-wire system works fine when its not touched at all, as soon as you start playing with ECU things, it looses it's mind.

In your case Scott, go through the service manual and find some diagrams for wiring, see which systems take a signal from the throttle, then use the cable-throttle's TPS to send that signal to those systems, instead of the fly-by-wire throttle's TPS. Shouldnt have to muck around with the E-manage at all, just make sure the voltage from the TPS on the cable throt. is the same as what the electronic throt. would've sent out. Should be fine!

Edited March 27, 2010 by turbo x-trail

[scotty nm35]

I just finished the cable bracket.

The oem tps is a twin opposed signal for error checking. At idle one is 0v and one is 5v, very hard to emulate.

All the load signals come from the ecu as a voltage output so I plan to use the Emanage voltage output map to send a similar signal.

[StealthX]

The oem tps is a twin opposed signal for error checking. At idle one is 0v and one is 5v, very hard to emulate.

Fark, sounds tricky!

Your e-manage plan should work pretty good I reckon.

p.s. nice work on the throttle bracket too!

[scotty nm35]

I did the same conversion in my X-Trail, I got fed up with that fvcking electronic throttle...

You're right, it seams to have a mind of its own, especially when it comes to idle...

I'm using an EMS stinger ECU which controls EVERYTHING when it comes to ignition and injection, so I didn't have to do anything in terms of electronics. Just installed the cable on the pedal and the throttle body on the intake manifold. No sensors, no wiring, I'm not even using a TPS...

Works perfect... needed a tough up tune cos the SR throttle was smaller than the other one, but that's it.

I'd highly recommend this mod if you are planning to do more in the way of engine computer and/or tuning later on. The fly-by-wire system works fine when its not touched at all, as soon as you start playing with ECU things, it looses it's mind.

In your case Scott, go through the service manual and find some diagrams for wiring, see which systems take a signal from the throttle, then use the cable-throttle's TPS to send that signal to those systems, instead of the fly-by-wire throttle's TPS. Shouldnt have to muck around with the E-manage at all, just make sure the voltage from the TPS on the cable throt. is the same as what the electronic throt. would've sent out. Should be fine!

Hi Cam, I have been enjoying reading about your mods.

The ecu will fault instantly if it sees the throttle open without it telling it to, or either tps signal deviate. Best to just let it fault and drive over the top of it. The engine runs at 1200 revs in limp mode and the auto still seems to shift fine with the throttle unplugged.

[StealthX]

Hi Cam, I have been enjoying reading about your mods. thumbsup.gif

The ecu will fault instantly if it sees the throttle open without it telling it to, or either tps signal deviate. Best to just let it fault and drive over the top of it. The engine runs at 1200 revs in limp mode and the auto still seems to shift fine with the throttle unplugged.

Yeah likewise, looks like you do some quality work too!

I had an idle that would vary between 2500-3000rpm depending on engine temp and vehicle speed (?)

You've got a bit more of a headfvck going on with that auto box, but seams you've got it all figured out with the E-manage's output maps, but can they be configured to send out a signal dependant on load AND rpm i.e. a 3D map with 2 variables (rpm and load?)

What are you using for engine load? MAP sensor? or stock MAF readings?

[scotty nm35]

Stock airflow at the moment with the Greddy map sensor helping tune. I may as well ditch the airflow but I still need the air temp readings which come from the same sensor. I also don't want to change too much either as I may need to go back to the elec throttle.

I will have to check on the two variable map but it should work well enough with only one.

[zei20l]

lemme know if you need a copy of the wiring diagram mate.

[scotty nm35]

I spent about 2 hours today with Cihan, I fit the cable throttle on the side of the road and away he tuned. We mapped the idle then the lower load points, once done I did the big test and shifted into drive.

The big grins on our faces as we realised everything was just working, the Emanage was taking full standalone control and still shifting flawlessly. It was priceless. Only issue, the kickdown isnt working, probably as there is no tps on the car now.

Very happy with the outcome. More power everywhere, even with the smaller 65mm throttle and instant throttle response and gear changes.

Sorry I couldnt stop to talk Garett, I was in the middle of tuning. What did she sound like at 7500?

[garetb16]

I spent about 2 hours today with Cihan, I fit the cable throttle on the side of the road and away he tuned. We mapped the idle then the lower load points, once done I did the big test and shifted into drive.

The big grins on our faces as we realised everything was just working, the Emanage was taking full standalone control and still shifting flawlessly. It was priceless. Only issue, the kickdown isnt working, probably as there is no tps on the car now.

Very happy with the outcome. More power everywhere, even with the smaller 65mm throttle and instant throttle response and gear changes.

Sorry I couldnt stop to talk Garett, I was in the middle of tuning. What did she sound like at 7500?

Sounded great mate. Thought it was you in the distance. Def picked up when you shot off up the hill. Glad to hear it's all running well! Very impressive. You will have to do a 1/4 mile run I think.!

[scotty nm35]

Not that I condone full load testing on a public road but we had to tune wot somehow.

[StealthX]

Good to hear scott!

Restored my faith in E-manages, a few people bag them out, but I reckon they do pretty good! Especially when they're set up like yours, taking full control of injectors/spark.

Do you have an idle control valve or anything installed?

The only problem I've got is I can't have the aircon on when I'm sitting idling warm, cos it doesn't recognise the extra load and bump up the idle, so it just stalls! lol So I'm left with a cold idle of 850ish and a warm idle of 1250...

[scotty nm35]

I have the idle valve but didnt use it. Warm idle is 900 and in drive it is 700. Havent tried the aircon yet, I didnt expect to be driving home with the throttle on the car let alone working perfectly.

Very impressed with the Emanage.

[andy65b]

Well done Scottie, I look forward to hearing how the 1/4 mile run or the dyno run goes.

Cheers

Andy

[Angus Smart]

In your case Scott, go through the service manual and find some diagrams for wiring, see which systems take a signal from the throttle, then use the cable-throttle's TPS to send that signal to those systems, instead of the fly-by-wire throttle's TPS. Shouldnt have to muck around with the E-manage at all, just make sure the voltage from the TPS on the cable throt. is the same as what the electronic throt. would've sent out. Should be fine!

In regards to this... do we even have a english or japanese service manual in pdf at all??

[iamhe77]

I spent about 2 hours today with Cihan, I fit the cable throttle on the side of the road and away he tuned. We mapped the idle then the lower load points, once done I did the big test and shifted into drive.

The big grins on our faces as we realised everything was just working, the Emanage was taking full standalone control and still shifting flawlessly. It was priceless. Only issue, the kickdown isnt working, probably as there is no tps on the car now.

Very happy with the outcome. More power everywhere, even with the smaller 65mm throttle and instant throttle response and gear changes.

Sorry I couldnt stop to talk Garett, I was in the middle of tuning. What did she sound like at 7500?

Great shit mate! Can't wait to take it for a run tomorrow night

Now I guess you will be hunting down a full size throttle body?

[StealthX]

In regards to this... do we even have a english or japanese service manual in pdf at all??

Yeah no idea! try finding at least a car with the same engine (something infinity, cedric, cefiro, has gotta have close to a VQ25) and search eBay...

[StealthX]

In regards to this... do we even have a english or japanese service manual in pdf at all??

Yeah no idea! try finding at least a car with the same engine (something infinity, cedric, cefiro, has gotta have close to a VQ25) and search eBay...

[andy65b]

there is a Japanese service manual, just waiting for the translation and the pdf.