Anyone else have a problem with their blazer having a slight miss at idle? I just had the heads resurfaced and a valve job. Just got the engine back together today and the slight miss is still there. Maybe it's an urban myth, but I always heard if you held a dollar bill up to the tailpipe and it blew and sucked it back in, you have a burnt valve. Well, I had the problem before sending the heads to the machine shop and I still have it after the valve job. What gives with the miss at idle? What else can cause those symptoms?

 

Injectors? Bad rings?

 

That brings up a good question. What is a good way to clean the injectors? Sea Foam or Techron in the fuel system? Or is there a reliable way to clean the injector assembly off the vehicle @ home? Would you try a fuel system treatment first?

 

I like the Chevron Techron Fuel System Treatment Plus, but I use it more as a preventative measure than a "use it cause I'm having problems" type of thing. There are some professional kits that run the engine off of a pressurized can of cleaner that connects up to the fuel pressure test port. It requires that the fuel pump be disabled (remove the fuse and/or relay). This is a more intense manner of cleaning and usually does quite well.