I’ve recently removed all my injectors, had them ultrasonically cleaned, new seals and pipes refitted in a different order and reprogramed. when running normally this has had a wonderful effect, the engine is quieter and smoother, ignoring the problem I am having with the aux belt. However, on a cold start up (if the engine is warm already this doesn’t happen) the engine is rough idling at 1000 instead of 700-750 and it makes a huge amount of smoke (white) before settling down once it’s warm.
Is this just the engine still learning the new injectors and the problem will solve itself over time (I’ve only had 5 or so starts as I’ve gone back to uni and don’t drive too often) or is this something that’s wrong? if it is where do I start looking, I plan to clean the MAF this afternoon to see if that makes a difference?
Thanks to anyone in advance,
I'm an engineering student (which translates to me thinking I’m good at this but actually having no clue)