luxembourgrst

well i putted a map fueler 2D
with a 5th Bosch injector mountend in the crossover pipe
and a ajustable pressure switch in the manifold near the standard green Knock sensor
an one wiring goes to the Negative on the coil

my car is set up at 20 psi boost on a stage 2 t3

my AFR sounds 14.7-14.8 at idle
13.8-14.8 at cruise

the problem and what i dont understand is when im put half throttle (gaz pedale) and let the boost comming up to 1bar my AFR stays at 14.8 and then i let the thorttle pedal up again ( the dumpvalve put the overboost out) and is only at that moment that my AFR goes to 11.11 ??

is like when the throttle body closed then the 5h injector starts up
thanks

Karlos G

iTrader: (4)

All cars will go rich on lift off (Proper management has deceleration fuelling adjustments to prevent it), are you sure that's not what you are seeing? Or are you saying if you lift off and then depress the pedal again it stays at 11.11?

luxembourgrst

when i have my foot on the throtle pedal and let the turbo boosting the AFR still at 14.8 like at cruise and then the AFR only hit the 11. 11 when is to late when i take my foot away from the throtle pedal an the dump valve open then it hit the 11.11 AFR

Karlos G

iTrader: (4)

So it sounds like you need to increase your on boost fuelling then mate, what you are seeing is a rich spike as you lift off.

RSBryden

How do you no all this info mate, your very intelligent ! I'm amazed at how many people on here no what they are talking about!

Red_bull

it's on all the internet now a days. Maybe even supplied by your wideband sensor?

Read about detonation; AFR ratio's and find some AFR targets for cruise, full load and boost and read about iginition advantage and you will be able to understand your engine alot better

Karlos G

iTrader: (4)

lol Thanks, I build engines and tune cars for work.

Perfmr2

And with that, Karlos wins

Do you have any pics of the mounting of your injector, ive got one to fit soon, just wondering how best to do it, as mines come with a flat mounting surface.

luxembourgrst

well it s a old MF1 2D
http://microtechefi.com/download/MF-1.pdf


i don t know what is the potiometer in the middle who was set up with white tipex






i have a boost pressure switch in the inlet manifold with a djustable screw

the problem is always the same : the 5 th injector works only when i close the throttle body then the AFR hit the 11

like to late lol

James @ M Developments.

iTrader: (2)

you need to go back to basics first really, turn the boost down to a point you don't need the 5th injector, and un plug it, then set the car up so the cruise and idle afr is good, and the on load afr is safe.

at that point you can then start using the 5th injector knowing you are not using it to fix issues with the base set up.

its very easy with the 5th injectors to be adding fuel on load, when the whole enrichment circuit on the bosch system is not working, so i always advise first to go back to basics, make sure it all works as it should, and only use the 5th injector as a add on, not to bypass problems.

luxembourgrst

everything is fine

is only the problem with the pressure switch for the map fueler

when the throttle flap is open and the car is boosting it dont activate the pressure switch
but when i let the throttle flap back down(back way too close) then the pressure switch works and my AFR hit the 11.11 but only to late lol

also when im like 4 gear push throttle let the boost climbing to only 5 psi the AFR stil 15.2 (like cruising afr)
and when i puch the throttle down (the flap closed) the the AFR hit the 11.11

it s like the pressure only puchs the switch when the throttle body is closed

my pressure switch is installed next to the green Knock sensor

Rob_DOHC

iTrader: (4)

It shouldn't really work like that. With the pressure switch on the plenum after the throttle body a closed butterfly would mean a vacuum ie, no boost so the 5th injector should be doing nothing.

I don't know what pressure switch they use, is it s simple 2 pin switch or does it have 3 pins? if it has 3 pins it is possible that it is not correctly wired as there could be NO/NC terminals.... test it with a multimeter and a compressor.

As above, turn the boost right down and start adding fuel in a safe, controlled state. I would start by adjusting all of the potentiometers to full rich and then gradually backing them off until you achieve your desired AFR, then increase boost and repeat.

Rob,

Rob_DOHC

iTrader: (4)

Just to confirm, is the pressure switch before or after the throttle body?

luxembourgrst

The pressure switch is a simple on/off switch with to pins. And is located in the manifold near de std knock sensor means after the throttle body

Karl @ FPT

It's not a normally closed switch or something stupid like that is it? So your fuelling with the 5th all the time and then when it see's pressure the switch opens and it shuts the injector off?
Have you actually tested it with a multimeter?
Or run a bulb in parallel to the cabin so you can see when it's working inside the car?

luxembourgrst

lol well i think my 5th injector don t work

i put the to wire togheter on the pressure switch like it is ON

and no fuel adding on the injector??

well it s an old mf1 map fueler bought on eBay


one + wire one - ground
one yellow who goes on the negative on the coil for the rev ( but i have a group A coil an there are 2 negative pin on it) but the two are connected togheter i think

and two cable who goes to the pressure switch (who i driectly put togheter)

my AFR is 14.7 at 18psi boost (NOT good)

luxembourgrst

every thing is good connected my injector works with 12v sumply

is this one good this fuel driver
http://www.carid.com/aem/water-metha...n-30-3306.html

luxembourgrst

can it really be that it dont works because the rpm signal is connected to the negative pole but on a group A coil?
need again a standard one??

luxembourgrst

well my fuel driver work now
i found out that a little terminal pool was cut of on the mainboard on a kind of transistor put it back togheter

i puted a bridge on the pressure switch terminal like it was always ON

car was on idel i played with the rpm fuel richement shows the engine did other noise and other AFR
then when back to my garage made the fuel driver OFF
cut the engine
try to restart and impossible to restart the engine again at hot engine

i have spark put new spark plugs puched the meetering flap down
imposssible the engine don t START ????????
spark plug are weet fuel is there spark is there....????


let the car on idle and i pu