2x 4 625hp lean misfire after decel and accel
Hi there
I have been doing a lot of reading on the internet and in most of the forums also some online study in regard to EFI.
My problem is that i seem to have a lean misfire after decel and then small accell.
My log seems to say that the fuel AFR is not correcting quickly enough?
Seems to be after "Tail"
The Engine is a Ford 351 Cleveland with Comp Cam Magnum 280H grind lobe sep 110degree
230 at 0.050
I am running it on Cam setting 3
Have raised DFCO temp to operate to 300.
Replace temp sensor as original reading low
IAC steps around 10-12
Have also tried to increase AFR Loop Speed
Will this learn out?or will have to go into the 3D table and adjust?
Thanks for your help Mike
I Have noticed that there is a little bit of noise in idle from tach which i am remedying at the moment with shielding.
(you can see this in the log)
Please find link attached. https://www.dropbox.com/s/u95rh4aljaxzwwn/DashBoard21.csv?dl=0
It can learn out, but quicker to adjust tables.
Hi Guys
Thought this might be useful for anyone running 2 x 4 set up
As above I was suffering what seemed to be a lean misfire through carb after de accel and slowly accel again.
I have been trying to tune this out for the last 2 weeks.
What has fixed it is the Accel pump settings.
I found that if I had the Acel pump setting too high it would backfire through throttle bodies and if I had the AccelPump to low I would get a backfire in the exhaust.
Try adding or subtracting 10 to Accel pump setting and find the sweet spot.
Once you find the sweet spot you can add or subtract 2 to fine tune.
This has made a remarkable difference to the car so now i just need to drive it and let it learn the rest.
Hope this helps someone else experiencing the same problems.
Cheers
Also rerouted Tach wire away from Distributor and shielded .this also sorted out the interference to the handheld