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-   -   Rough Idle since new plugs (https://mitsubishiforum.com/forum/everything-else-37/rough-idle-since-new-plugs-30808/)

w9awx Jan 6, 2009 04:34 PM

Rough Idle since new plugs
 
I just replaced my spark plugs, the old ones were really bad. Center electrodes all worn down.

Anyways, I replaced the spark plugs with autolite #69s (put dialectric grease in the boot of the spark plug wires), topped off the antifreeze, changed the engine oil with semi synthetic valvoline.

Now I have what I can best explain as a idle ad just off idle miss. misses up to about 1500rpm then is fine.

Did I do something wrong?

Help please and thanks in advance.

TheEngineer Jan 7, 2009 05:43 AM

RE: Rough Idle since new plugs
 
crappy plugs and also they may not be gapped correctly

w9awx Jan 7, 2009 05:32 PM

RE: Rough Idle since new plugs
 
ok, try ngk's ???

dsm1990gsx Jan 7, 2009 06:37 PM

RE: Rough Idle since new plugs
 
I totally agree autolights are crap, get ngk's and be done w/ it.


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