Re: Car rough idle problems need help.

Greg Rozelle <invaild@[EMAIL PROTECTED]
> wrote in news:fUpNi.4254$oA2.1319
@[EMAIL PROTECTED]
> 1993 Nissan Altima GXE
> 
> Car rough idle problem need help.
> 
> I know I asked this before.    I am going to be a little bit more
> detailed.
> 
> When in park, neutral it shakes
> When in reverse it shakes worse.
> When in drive it shakes under 30 mph.
> When going above 30 it shakes a lot less or does not shake at all.
> Shakes at stops. 
> 
> From Reading
> Spark plugs & wires seem to be the most cause even if they look 
new.
> Wouldn't a compression test tell if it is bad spark plugs?
> 
> Next is a fuel filter.   Which I am tempted to try. 
> 
> The other is a fuel injector. 
> 
> 
> Greg Rozelle
> 
> 
> 
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Compression test will only show worn Piston rings  or bad valve/valve 
seats.

Test your plug wires  with an ohm meter  doesn't really matter what 
reading you get   just as long as all the wires are close  I can't 
remember what resistance plug wires have per foot,   but like I said  
if one is bad you will see a very large difference.  Also look at the 
plugs and see if  any are fouled (oil)   or are also burnt white 
(which could indicate a lean running condition). like the wires  all 
the plugs  should look like each other of one is differnet  then you 
know you have an issue in that cylnder  which is causing the rough 
idle.

Take the time and mark you plug wires before you take them off.

Good practice to change your fuel/air  filters  when ever you do a 
tune up. You should be able to blow through the fuel filter fairly 
easely (be carefull of gas) If it is acting like your trying to blow 
up a balloon  your filter is plugged.

-- 
The most reliable time to upgrade to a new Operating System is at the 
end of its life cycle.

Dave