Re: Rough idle

["David Teitelbaum" <jtrealty@xxxx>]

For a smooth idle you need to have all of the cylinders balanced very 
close to each other. That means compression, spark plug gap, valve 
adjustment, injectors, etc. After you are sure all of the mechanical 
parts are good then you can begin to attack the control systems. Rule 
out vacuum leaks, timming, bad ignition wires. On the injectors it is 
not so much a plugged up on as it is a dirty one. Dirt will cause a 
bad spray pattern and low holding pressure. They will have to be 
removed and tested to make sure they aren't the problem.
David Teitelbaum
vin 10757


--- In dmcnews@xxxx, "Payne" <bpayne@xxxx> wrote:
> My car has developed a rough idle that has been most annoying. It 
sits
> around 850 RPMs, and I know my idle speed motor is working. When 
it's at
> this engine speed, it almost sounds like a distant helicopter. By 
that I'm
> assuming it's not firing correctly on one cylinder at idle. It 
doesn't feel
> like a completely dead cylinder, as when I'm driving it has all the 
power it
> used to. I can rev it up and the engine sounds very smooth and 
quiet.
> 
> The injectors open by pressure, correct? Hypothetically, if I had a
> partially clogged one, would the pressure put through it at idle be 
low
> enough so it wouldn't open? I heard a while back of someone having 
this
> same problem. I do have all new plugs and wires, so my next area to 
look is
> the fuel system. The car feels great on the road, I just wish the 
idle
> wasn't so shaky.
> 
> Thank you all!
> 
> payne