Re: Car rough idle problems need help.

You might have fuel injectors that are getting plugged. It is really CHEAP 
to put some injector cleaner into your gas tank. You can even buy it at 
Wall;yu-Mart for maybe a buck. I had one injector changed on a 97 P.U. 2.4

liter and it made a Big Difference. The mechanic had said my problem 
*wasn't* that #4 injector - but the check engine alarm said #4 cylinder
was 
misfiring. The mechanic/technician stated that because he could NOT hear
the 
injector making any noise he felt "sure" that wasn't my problem - - -
Wrong. 
This truck had far better power and smoothness after that injector got 
changed. That mechanic told me the Nissan fuel injectors are well known as

being prone to getting plugged up.

Then we were using some bad "grocery store" cheap gas for a while and BOTH

my truck and wife's car started running rough as a cob. I began using some

injector cleaner and both our vehicles started running okay after that. 
Probably the best injector cleaner I've used was some I believe was from
an 
anti-freeze company like maybe (?) Prestone I bought in a Pep Boys. It was

in a tall silver or gray plastic bottle and it probably cost more than
most 
clearers. It worked great! The ac***ulated carbon that then got burned out

of the truck combustion chambers caused that truck to overheat quite a bit

for the first several miles after the injector cleaner was poured in! 
IMPRESSIVE!

Another problem this '97 XE pickup (4 cylinder) has had is the original 
distributer cap gets dirty (why????) INSIDE and it can cause the engine to

be hard to start - especially in wet weather. ROUGH running and hard 
starting also can be caused when the high tension wires to the spark plugs

get dirty. I once met an electrical engineer who told me about that. He 
would take a rag and carefully clean off his high voltage wires to the
spark 
plugs. With a dirty distributer or spark plug wires, the dirt will attract

moisture and that allows the spark plug voltege & current to leak off 
("short circuit") though the 'dirt' to the vehicle ground = chassis. What 
works REAL nice to heal your electrical leakage probelm (short circuit of 
high voltage to ground) is to buy a can of silicone spray & coat the plug 
wires & distributer with that stuff. After the silicone gets soaked-into
the 
plug wires, the wires tend to repel water a lot better, - - -  a can of 
silicone spray is cheap insurance.

"Greg Rozelle" <invaild@[EMAIL PROTECTED]
> wrote in message 
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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