After I installed my pte 880cc injectors, I'm having an idle issue during warm up. It will idle at 1600rpm and the afr will hover around 14.7 but then randomly spike rich and bogs the engine down for a second or 2. It'll spike into the 11:1 afr range. It only does this during the warm up period before coolant reaches operating temperature. Any ideas?

 

I wouldn't care as long as it reads correct after warm up.

 

mine does it also after first start up but. with Precision 1000cc injectors.... itll idle at 2k rpm and taper down slowly.