SOURCE: vibration
Sounds like one spark plug is worn/ miss firing more than others, replace set x4 and try again.
SOURCE: i need repair manual for mitsubishi sigma 1992
Chiltons and Haynes have wiring diagrams and can be purchased at auto parts stores but I prefer the free method. My first option below:
Most
libraries have repair manuals in their reference sections,
A lot
of local libraries also subscribe to online auto repair manuals such as
Chilton's or Haynes and offer free access if you have a library card.
Contact your local library and ask if this service is available.
Repair manuals online:
•
One of the first places to try is AutoZone's website. The site has a
very comprehensive free auto repair guides covering most makes and
models of vehicles from 1950 to the present.
• Napa auto parts website provides tutorials on basic auto
maintenance such as oil changes, checking fluid levels and replacing
air filters.
• Automoting.com has tons of information, is very user friendly
and as a bonus, even has guides for repairing small engines and
household repairs.
Another
useful resource is the 2carpros.com website. Here you can post
questions and get answers from real mechanics. You can also search
through lots of topics on auto repair, troubleshooting, and maintenance.
Edmunds
web site also has a pretty good forum called car talk. It is peer based
and has quite a few very knowledgeable members on board.
There
are quite a few other forums and message boards available online, as
well as peer based ones. Just type in auto repair forums or message
boards in any search engine and you will see quite a few. Just watch
out for ones that say they are free but try to sell you something, or
say you can post questions, but must pay a fee to receive an answer.
You will most likely find free auto repair guides and all the
information that you need, so there is no need to pay for help.
Libraries:
If
you really prefer to have a paper manual, check half.com, an eBay
company that sells used books for a fraction of the price of new. Some
of the manuals as low as $1.99. There are several other used book
websites like Alibris books and Bookfinder.com to name a couple.
You can also check local used book stores.
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