Hey my engine sometimes would not idle after startup or idle at a very low rpm and sometimes become very shaky after startup, I was wondering if fuel injection cleaners would help solve the problem? maybe its some nasty clog up in the idle valve, do u think fuel injectors can fix it? thanks in advance

 

I'm no mechanic, but from reading the posts on here and doing it myself, you might want to try a good fuel injector cleaner, you also might want to clean the MAF sensor with a MAF sensor cleaner and lastly you might want to clean out your throttle body with throttle body cleaner. Not that I was having any idle issues, but I did notice a difference in how the car did idle on a cold start up. Also, I've been told when you do any cleaning or change or replace any parts that effect how your engine runs, you might want to reset your ECU by disconnecting the negative ground terminal of the battery and wait several minutes, then reinstall ground terminal and drive it around for about 15 minutes, so the ECU relearns and reprograms the proper air/fuel ratio.

 

one time I was replacing my air filter, shaking the intake too much, made it loose right at the manifold, made the car won't idle.

Hope you have a simple problem like I had.

 

What...???

 

plastic parts of the intake was loose. Check for connections.