Hyundai Repair Questions? Ask a Mechanic for Answers ASAP
Hi, my name is ***** ***** I will try to help out. Do you have a check engine light on or any other symptoms to speak of?
do you have a way to scan it?
so when you say that it fades in and out, you don't mean the tac fades in and out?
I really doubt you have an injector issue...It sounds more to me like a vacuum leak. I would use a flammable spray such as brake cleaner and lightly spray around the engine bay to see if you can detect an idle fluctuation. If you do, then check in the area you are spraying at the time that it occurs for a vacuum leak. Some main places to check are the intake gasket and main vacuum lines like the one going to the brake booster.
Good luck, my friend!