Jump to content
SAU Community

Rb25det - Flat Spot Just Off Idle

Color_Of_Green
 Share

Recommended Posts

Cubes Grand Master

Cubes

Posted
Posted

It really depends on how large the injectors are and if there's enough scope within the pfc's inj. map adjustment.

The pfc only allows adjustment of 0.49 to 1.49. Or something along those lines anyway. So as you can see by that there is only limited room for adjustment. In your case .54 is pretty damn close to the lower limit the pfc allows. :)

Within the datalogit there is a recalc base function, all though it has its flaws that too can be used to sort out the inj. trim function.

Color_Of_Green Enthusiast

Color_Of_Green

Posted
  • Author
Posted

Ahh thanks cubes, you're a champ.

Just to let your know, I disconnected the AAC and adjusted the idle screw but the maximum it would idle was around 800 rpm. I have my PFC idle setting on 850 rpm. I didnt go through the data init & idle learn as like I said before I dont have a datalogit yet so ended up putting the AAC idle back to where it was and reconnecting the AAC plug.

I would have though that the max idle rpm could be set higher than 800 via the AAC screw?

Color_Of_Green Enthusiast

Color_Of_Green

Posted
  • Author
Posted
Your aac sounds a little clagged. Might need to rip it off and give it a clean in carby cleaner/petrol what ever. :D

So did help the problem at all?

I actually forked out the $$$ for a brand new one a couple of months ago.. :dry:

As for the injector lag, I couldnt actually detect any differences between +0.00 and +0.08, and I was trying to do the math to find out what effect the difference in lag would have theoretically at say 7000RPM but I am not sure at what position in the induction cycle the injector fires [ would appeciate some input there ]. I am waiting on some books on EFI from amazon that should explain the theory to me as I am really guessing :(

Once I restore my IGN and INJ map from my last tune I will be able to tell you if what I have done has made a difference.

Cheers

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...