trying to get my AFR's right as the car was/is running very rich on idle and accross the board in general

What should I set the % injectors to on standard injectors ? Do I need to adjust the lag time at all on 550's and 850's

My idle cells were set to 1.20 and running 11AFR. They are now set to 0.92 and running 13's but if I try an decrease even more to get 14 or 14.7 it runs like a pig.


thanks in advance
Rob

 

For stock 550 primary and 850 secondary, all is 100% and 0 lag. You only change these if using not stock injectors.

Our engines idle best around 12 to 13 AFR. Mine idles at 12.8AFR.
My cruise is 16AFR.

 

Thanks for that..... wierd I that these like to idle at 12/13. Might have problems when it comes to MOT time seeing as its not 14.7. On a stock ECU/Car do they run 12/13 ARR?

Was looking to change the % setting in order to lower the fuel accross the range of the fuel map rather then change pretty much most cells on the fuel map. (only have hand controller and not a datalogit).

I am running about 10 at top on full boost at the moment and tailing back fairly linearly to about 12 on mid/low boost.

Need to pull a fair few cells back at the moment, hence thinking about the % injector setting to tackle it from another direction. It might not be the way a pro mapper would do it as they would have a datalogit and be able to change several cells in one go, but do you see any problem with going this route so long as the AFR's across the range are OK?

Cruise is about 14.7.

 

Remember this, when checking AFRs;
(1) the air pump has to be turned off/disconnected
(2) the O2 sensor has to be placed before any cats.

 

Air pump has been removed all together, and wideband connect pre-cats, but again don't have any

Done as suggested earlier, and it did have the desired affect when pulled back to 90% but still running a little rich, running about 11 at the top now. Mid range was about right. Only thing I have noticed was that the cruise was now at about 16afr and possibly slightly more at times, which did start to worry me running this lean on cruise. But your not the first person to say 16 is OK so not as worried as I was.

But trying this could have been in vain as I have encountered another problem. which could affect the tweak I just done to fuel.

I am only boosting 0.64 bar boost, and tried drastically change the boost target and it does not seem to make any difference.

My turbo's are now running non sequential and was done by the previous owner. Any ideas ?. Could the boost control solenoid be defective, could it be the plumbing say from the turbo/actuactor to boost control solenoid ?.

I would appear to have one hose coming from the turbo outlet nipple into the actuator then a hose coming out the actuator to the bottom connection on the boost control solenoid. I have 2 hoses coming out the inake before the turbo which all seem to merge back to the same place along with one pipe that is connected to the top nipple connection of the boost control solenoid.

Does this plumbing sound about right for a non sequential set up. Looking at the amount of hoses, It would surpise me if the former keeper got this wrong.

Or perhaps I have the boost duty in the hand controller completly in the wrong zone ?. What boot duty are others running to get say 0.8bar boost ?

Should probably post a seperate thread on this, but any help greatly appreciated again.

 

I never used the PFC for boost control as I was already non-seq with a mechanical boost controller. When I tried it with the PFC, I did not like it. Went Blitz DSBC R.

Read pages: 27, 28, and 36 of the PFC manual.

 

Apexi AVCR or equivalant are far better as they can hold the boost alot better and let you increase torque by pushing the boost in the mid region and then tailing off at the top.

Definately on the list of things to do, but would like to work out why the PFC dont seem to be controlling the boost at all first. As a temporary measure, I could try a manual boost controller which I have kicking about.