tvh sensors not the best but if you have a spark and not throwing up a code it won't be the cam or crank sensor the most common fault is air flow meter does not throw code have also had problems with shut off valve you can get them apart and clean the seat and plunger. I would bet it is low pressure can you check with uptime They also teach them self's to run best on a fault so when anything is changed you should do a fast tas relearn the temp of colant must be 80 or over otherwise it will not work will just keep on processing and you will have to cancel