So I pulled my injectors to have them flow tested and cleaned as a maintenance thing and after putting them back in, checking for fuel leaks, and then starting the car the cold idle afr reading on my wideband is off the chart lean. Reading -- until the car is almost fully warm. Once the car is warmed up the afr is back to normal bouncing around stoich.

No smell of fuel, no fuel leaks. Checked all fittings to make sure they were tight and re zip tied the fpr line.

Any thoughts?

It had no issues at all until I had them cleaned. They were all in balance and only 100cc off of the mark before cleaning.

Thanks!
Chad

 

pull the battery to reset your long term fuel trims. Then run the car and let it relearn them. If its still super lean you might need to rescale your injectors. If you have a logging cable, the goal is to have your LTFT mid and low +-3%. Outside of that and you might benefit from further scaling.