Jump to content
SAU Community

Please Help *urgent*

calais25t

By calais25t,
in Engines & Forced Induction

 Share

Recommended Posts

Sydneykid Grand Master

Sydneykid

Posted
Posted
Bump.

Come on guys I need to know if its necessary for my engine to run.

From what I can tell my after market computor isnt even plugged into it anyway.

Do I need to plum it in or not?

What throtte body are you using?

:D cheers :wub:

Sydneykid Grand Master

Sydneykid

Posted
Posted
Im using an XF throttle body and also my computor dosent run a throttle position switch/sensor.

Its an EMS stinger if that helps.

The common solution is to use a throttle stop on the XF throttle body to control the idle rpm and piss off all of the ECU controlled idle speed hardware.

:D cheers :wub:

BHDave Grand Master

BHDave

Posted
Posted

I ran my rb20 without it for a year or so. Started and idled fine, it would just stall approaching the same speed hump every morning :D

So i got in the habit of clutch starting it once past the speedhump and it was happy to keep going after that.

calais25t Enthusiast

calais25t

Posted
  • Author
Posted
The common solution is to use a throttle stop on the XF throttle body to control the idle rpm and piss off all of the ECU controlled idle speed hardware.

:D cheers :wub:

Could you please elaborate on this sydneykid?

Are you saying not to run any of them including the two on the back of the plenum?

Thanks.

Sydneykid Grand Master

Sydneykid

Posted
Posted
Could you please elaborate on this sydneykid?

Are you saying not to run any of them including the two on the back of the plenum?

Thanks.

You need to talk to your EMS tuner, as to how he wants to control the idle rpm. The standard RB20/25 throttle body closes completely. So the standard ECU (and Power FC) controls the idle rpm by opening and closing various valves that bypass the throttle body. So when it is cold the ECU advances the ignition, richens up the A/F ratios and increases the airflow into the engine to increase the base rpm and give stable idle. Similarly, when the engine is up to operating temperature, the ECU increases the airflow into the engine to increase the rpm for air conditioning, power steering and electrical load.

I haven’t studied the idle control circuitry in great detail, but my simplistic understanding is the ECU open up various different sized valves depending on the idle speed demand for air flow. This is different to many other engines that use a stepper motor to open the throttle butterfly to achieve the airflow changes required.

The EMS’s that I have dealt with don’t have the feature of staged valve openings to control idle to a number of preset rpm's. So the tuners tend to use a throttle stop to hold the throttle butterfly open, then use A/F ratios and ignition retard/advance to achieve idle stability, hot or cold.

So talking to your tuner is always first on the list when looking at idle speed control

:D cheers :wub:

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • PranK
      Chris' Toyota Mark ii JZX110

      By PranK · Posted

      This looks great! Awesome to have the 5 speed with an LSD in this. The Recaro's look like SR2's or SR3's. It's a shame they've been retrimmed as they would have looked sweet in their original colours. I think I'd want my agent to be a little more up front and informative too. I've never imported but I reckon it would make me a little nervous, so the more info the better.
    • soviet_merlin
      Duncan's V37.......race car?

      By soviet_merlin · Posted

      Thanks for doing that Duncan! Makes you a good person in my books. We don't get kangaroos or wombats here. But we have bats and it's similar. AFAIK it's often the mums with a baby attached that get hit because they drop lower when starting from a tree. If you hit an animal, check on it. https://www.ifaw.org/au/resources/wildlife-rescue-app An app to get the closest wildlife rescue contact.
    • Murray_Calavera
      Jacks that fit under GTR lips that can reach the subframe?

      By Murray_Calavera · Posted

      My dream is also to have a proper hoist, but I don't think it will ever happen. My quickjack is probably as close as I'll ever get, it really is very good though. 
    • Duncan
      Duncan's V37.......race car?

      By Duncan · Posted

      Yeah we keep on in the dailies, it is pretty poor how many animals get hit and the driver leaves without checking....have saved a couple of little ones over the years. Bit of a gruesome job though, pouches generally need to be cut open because they are so tight and often the joey doesn't realise mum is gone so they are still locked onto the teat. I checked the modules in front of the DS wheel where an oil cooler should go.... There is the radar unit - that can go for race use) One of the 2 HX water pumps, the silver cylinder. That needs to be kept but might be able to be relocated But the bad news, the big computer mounted vertically in front of the wheel (blocking any potential air exit) is the electric steering computer. That is required until/unless i do a hydraulic steering conversion, and in CAD based modern car design it is not like I can just pop a big unit like that somewhere else (plus the loom would be too short anywhere else too). So, the passenger side is OK to clear out (just use a smaller washer reservoir, potentially elsewhere), but the DS no beuno
    • Duncan
      Chris' Toyota Mark ii JZX110

      By Duncan · Posted

      Well, all the best with the new camry It was interesting to hear about the UK process, it is generally a lot more streamlined here with a shipping agent looking after all the import side (noting the exact final price can still be a surprise.....) and I've used a few different brokers on the japan (or US) side, and never had any trouble with any of them....luck of the draw I guess. You mentioned you didn't get the auction sheet (understandable since you bought it from a dealer, not auction), but I always try and get hold of that because they are pretty thorough. I've imported 2x R grade vehicles over the years and both were fine, repairs in Japan are pretty thorough compared to here in Oz.
×
×
  • Create New...