i drive a 1999 Honda accord and since last month when i had some work done on the engine to fix my piston slap, i have been experiencing hunting idle and stalling ( sometimes the engine just goes off) whenever i engage the gears and when i go back to park or neutral it doesnt always go back to idle rev... i have changed my plug wires and even spark plugs with little or no improvement also noticed that since this issue emerged I have had excessive fuel consumption, checked my spark plugs and there is lots of carbon residue on them. Any suggestions on how to fix this problem is welcome cause at this rate my mechs are gonna run me bankrupt with their continuous (and expensive) guess work. dax

 

First run a compression test to check if the engine is in good shape.

 

 

It is... When it starts up it idles smoothly... Problem starts when I engage the transmission... Then the rev drops to bout 300 and doesn't come up unless I give it a lil gas...

 

Scan for any check engine codes and transmission codes.