I had a new engine fitted, about 8 months ago. Only done about 500 miles in that time. But ever since its a stutter misfire, sometimes it never happens. But today was really bad. The symptoms are:
Regularly wont rev past a certain revs. Sometimes 3.5k ish (today) sometimes 5.5k ish. Basically it wont go to the red line ever.
When the this happens, the rev needle bounces around like mad. Hitting 0 sometimes.(something to do with the igniter??)
This morning it really struggled to start. Took 3 attempts. (this rarely happens)
I’ve changed the tps but no better (maybe even worse)
I’m going to change the spark plugs today to see if that helps.
Any help would be great as its very annoying!