Re: Erratic idle speed

["twinenginedmc12" <twinenginedmc12@xxxx>]

Hi Richard.

When troubleshooting, I always check the easist potential failure-
mode I can think of first, in this case that's probably the spark 
plug wires themselves and their sequencing, since changing the wires 
is what appears to have brought about the trouble. Besides, checking 
the sequence is pretty easy compared to checking some other things, 
so not much time is lost checking it out. If on the other hand, you 
investigate a lot of other hard to check things first, and find out 
that it was misconnected wires all along, you'll be saying "Doh". 
Your comment about the engine running evenly makes me less confident 
in my initial assessment that spark plug wires might be swapped. I 
would expect swapped wiring to result in noticeable roughness to the 
idle.
Having said that, I'd still start troubleshooting by checking the 
sequence, since it's easy to screw up, and easy to check. I would 
wait to consider other things that might be wrong until I had 
eliminated this possibility.


--- In dmcnews@xxxx, Richard Johnstone <webmaster@xxxx> wrote:
> Hi, thanks for all the responses
> 
> 1) Although Idle is erratic, the engine _seems_ to run evenly - 
could two of the wires
> still be swapped? I will be checking this anyay, but thought I'd 
ask.
snip