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Re: check engine light is on
Old message, don't know why it didn't pop up before now- problem is probably resolved.
If so, please drop back in to tell us how it was taken care of.
Check with chain auto parts stores in your area; Checker, Kragen, Autozone, Advance Auto or similar.
Call them to ask about their free code readout service.
If they offer it, they can check the code and then you will know at least what is causing that annoying light to light.
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www.carcarekiosk.com/.../2001_Mitsubishi_Eclipse_GT.../check_engine... ... steps to diagnose and clear a check engine light on a 2001 Mitsubishi Eclipse GT... Steady Check Engine Light: If your check engine light is on every time you ...
It's bad enough to have a steady engine light, but to flash...really not good. A flashing engine light means the vehicle is in "limp home mode". Enough to get you somewhere to have it fixed immediately.
All sorts of issues could be the cause here from plugged injectors, plugged fuel filter, bad spark plugs, bad coils. You need to find out what the codes are that are stored in the computer to provide more detailed clues as to what's going on.
It is either a fuel or spark issue. With fuel it could be a bad fuel filter, injectors or pump. With spark you could have a bad coil, wires or plugs. Checking the coil and plugs is the easiest so I would start there. Using a pair of spark plug wire pliers pull each wire from the coil one at a time and if you see a arc then the coil is good, if not then that would be your problem. Then pull each plug and see how the look. You can look online for pictures of what good a plugs look like. If they look bad then replace them and see if the code comes back. If none of that works then I would replace the fuel filter, it should be done between 25-30k miles anyways. If you can, have your fuel pump tested. You can also check the resistance one your injectors without having to pull them. Another good thing to try first is heet, in the red bottle. It will take any moister out of your fuel system which could be the problem.
You need to test each injector plug with a injector noid light.Have someone crank the engine while you observe the light.It should flash off and on at a steady pace.Test each one to make sure you have steady injector pulse,if they all test ok then you should not have a fuel delivery problem.Also if your spark plugs are wet or black they are fouled and you will need a new set.
After market spark plugs could be the problem.
Reinstall the old plugs and see if that fixes it.
This vehicle has an ion sensing ignition system and is real sensitive to the proper spark plugs. I would get the proper plugs from the dealer if the old ones work.
The codes P1311 and P1312 are ion sensing codes.
2.leaking egr or plugged pcv valve
3.ignition components damp or damaged
4.faulty or incorrectly gapped spark plugs
5.faulty plug wires
6.faulty emmission components
7.air filtr clogged
8.leaking head gasket
9.timing chain or gears worn
first check air filter then check timing with a light make sure its steady if it bounces around the your chain/belt is needing replaced check your wires for frays or just replace them cause their 10 years old