Hi just a quick q: I have a 1997 chevy Blazer LS and its got 300k on it, when i am idling like say at a light or something intermittantly the engine does a faint ruble almost like its a slight miss or something, when i accelerate, the engine seems smoothe as hell, can anyone give me an idea as to what this is, maybe A BAD spark plug???

 

any ses light ? maybe the truck needs a decent tuneup

 

no ses light on, but imma give her a tneup myself, is it possible to remove sparkplugs by mylself, i got a 97 blazer ls?....i looked on the left side of motor looks like i need to remove stuff to do the plugs? and

 

Do you have the front defroster on or A/C? It could be the A/C compressor cycling on & off. It makes the engine runn "rougher" sort of for a few secs.

 

No need to remove any thing to replace the plugs you can remove them from the wheel well or use a swivel ratchet extension or a plug removal tool

 

cool thanks