john ward

iTrader: (7)

Well i only have about 200 miles on my car as of now and got it mainly at 14.1 up to zero with a few exceptions. If im cruising and barely hit pedal im at 9to1 area a slight more pressure and its at 14.1 in same vaccum area. Dont know if its all in my wideband but i got load map best i can. mainly its around 14.1 every once in a while its alot richer after next shift im fine all through rpm range.
What area do i need to work on. does idle map affect anywhere other than just that idling?

bumpstart

very often you have to alter the bin values either side of the bin that looks culprit,, this is to do with the crude interpolation between plots

PS
if the particular bin with issue is around the staging threshold,, you absolutely need to remake the staging % value to suit the primary/secondary pairing
- else its very difficult to get a predictable result at that load point

ie,, if staging is 3000 rpm,, and -5 inch Hg ,, and your lean glitch is very close to this load value
( or whatever your threshold is set to )
then the issue is in the staging % value

john ward

iTrader: (7)

well started messing around and laptop died. think i need new battery. Is there a reason the microtech reads 2hg key on engine off. I knoe this wouldnt do that but should i be running restrictor pill or filter to unit. Its that amount off boost gauge at all times while running. One last one how do i set up the ground to my relay through microtech ltx8.

bumpstart

the microtech you have has a sensor calibration error,, or maybe an earth offset in the grounds
- doesnt need a pill, or a volume in the line , as long as the vacuum source is from the plenum or from both primary runners

( in old days gone you used to stick a fuel filter inline to prevent it reacting to rotor pulsing )

if you want the microtech to switch stuff on like aux output and fuel pump
you wire the relay with IG power to pin 85,, and the ECU output ( aux out or fuel pump wire ) to pin 86
( or vichy versa,, no matter )
pins 30 should be fused power from the battery,, and pins 87 through to the device

when the ECU switches pin 86 to earth,, the relay will operate,, powering up your device

rx72c

iTrader: (8)

Its not a calibartion error.


Its basic barometric pressure difference.

john ward

iTrader: (7)

wll that would be good if it was nothing i just thought it was weird to be -2 engine off. I have all vacuum load done awaiting engine being broke in for boost. Two things going on still at 3800 i go lean for a split second. what part of staging do i change there and at very light throttle im running 11.1. this is at any time im barely on throttle. bottom right box says rpmcrs when its happening.
And the above question about fan control. i dont see anywhere to have it command fan on and off at a temperature. Does the ltx8 not do this.

bumpstart

you need to supply more info as to your injector pairing before anyone can call what the issue is
,, almost certainly though,, you staging % value is too high,, making for unusually rich pre transition and cruise while making for a lean glitch upon staging

if you have same injector grouping,, the value should be 50%,, bigger primary than secondary makes the % value less than 50
while smaller primaries than secondaries makes for values above 50%

if you dont have this right ( before you play the pre-staging fuel bins ) you have almost no chance of getting around a staging hiccup
( unless of cause you HIDE the issue by making the motor stage on the transition away from idle,, ( during the acel pump feature )
IMHO the WRONG way to do it

playing the staging % now will alter all your prestaging /low load values you currently have
hence you must give us your injector sizings to approximate the stage %
BEFORE the prestaging values are played with too much


--------------
screen 29
set aux rpm on and aux map on both to OFF
( this will configure the optional output wire to use the auxFANon function )

use auxFANon and set the threshold temp you require the fans to start
-- off point is automatically 5 C degrees lower than the setpoint to prevent hunting

john ward

iTrader: (7)

well my stage is at 50% and i have 550 primary and 750 secondary on a s4 t2.

bumpstart

put staging to about 65%
( it will likely fall in the 63- 68% region,, depending on exactly what injectors they are ,, ie low ohming primaries may respond quicker and use a lower value than hi -impedance ones )

then remove about 20% from all the values in bins that are pre-staging
ie,, below the threshold for staging,, which stock is set to 3000 rpm and -5 inch Hg

see how you go,, juggling the % stage up 1% will add 1% to all fuel values below staging
( so if appears lean at staging you can add 1 or 2 % to the staging % to richen the transitions or vichy versa )

PS to lean down the cruise,, without trimming all the map,, or all the prestage,, you make sure your programming in "normal" mode,, not matrix
and go to screen 18 ( rpm cruise ! ) ,, and pull out % fuel only for the revs bins your seeing the rich cruise at

john ward

iTrader: (7)

so all my changes will still be done in load map to correct the staging percentages?

john ward

iTrader: (7)

hey man thanks alot. i have a long weekend weather permitting. whats a good temp to turn on fan. most cars i see are about 210f so thats roughly 98c.. i was thinking of going more like 200f or 93c. once again thanks for the help. Ive been working on cars for nine years now but this is all new to me and i want to learn as much as i can till its second nature. Much different than diagnosing a driveability problem with obd2

bumpstart

yes,, when the staging % is nearly right ,, you go back to juggling the load bin values directly
staging% value is added to all values in the map bins UNTIL staging occurs
i.e if you have a 2.0 ms in the bin tables,, the ECU will actually output 3.0ms
( if the %stage is 50 )

when the motor stages,, all the injectors operate,, and BIN values and correction factors will directly relate to the injector output

if the motor is post staging ( over both the threshold setpoints for stage )
and the bin value is 3.0ms,, and there is nothing in the coolant or inlet air temp correction maps
then output is 3.0 ms to all injectors

-- thats pretty much the math in it ,, and you may now well see why you cant get that instant of transition correct if the staging% is out

as for operating temps for the fan,, i tend to set them a little lower,, and use around 88-90 C as the turn on point

its all in the suck and see, as all bays and cooling systems differ, and your aiming not to have the fan on till necessary

marginal fans or marginal radiators may require a lower turn on,, and may run the fan nearly constantly

john ward

iTrader: (7)

Thank you it makes so much more sense now why my map was so off and on. I truely do appreciate your knowledge. Alot of trial and error and im sure a good weekend with a few laptop charges and ill get it now.