While driving check engine light turned on?

Hi,

Is it possible for you to record the engine turning over so I can hear it? Since it sounds like it is turning too fast, it sounds like compression was lost. Although the timing belt looks good, it still could have jumped timing. If that happened, this is an interference engine and internal damage is likely.

THis video will help is fix it

https://youtu.be/vMwTzURWXmk

If you can't record it for me, I need you to check engine compression and let me know what you find. Here is a link that explains how it is done:

https://www.2carpros.com/articles/how-to-test-engine-compression

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Here are directions specific to your vehicle which indicate what to expect. The attached pics correlate with the directions.

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2008 Mitsubishi Eclipse L4-2.4L (4G69)
Compression Pressure Check
Vehicle Powertrain Management Tune-up and Engine Performance Checks Compression Check Testing and Inspection Component Tests and General Diagnostics Compression Pressure Check
COMPRESSION PRESSURE CHECK
COMPRESSION PRESSURE CHECK

Required Special Tool:
MB991958: Scan Tool (M.U.T.-III Sub Assembly)
MB991824: V.C.I.
MB991827: M.U.T.-III USB Cable
MB991910: M.U.T.-III Main Harness A

1. Before inspection, check that the engine oil, starter and battery are normal. Also, set the vehicle in the following condition:
Engine coolant temperature: 80-95° C (176-203° F)
Lights and all accessories: OFF
Transaxle: Neutral (P range on vehicles with A/T)

NOTE: On vehicles for Canada, the headlight, taillight, etc. remain lit even when the lighting switch is in "OFF" position but this is no problem for checks.

2. Remove all of the ignition coils and spark plugs.

pic 1

3. Disconnect the crankshaft position sensor connector.

NOTE: Doing this will prevent the engine control module from carrying out ignition and fuel injection.

WARNING: Keep your distance from the spark plug hole when cranking. Oil, fuel, etc., may spray out from the spark plug hole and may cause serious injury.

4. Cover the spark plug hole with a shop towel etc., during cranking. After the engine has been cranked, check for foreign material adhering to the shop towel.

pic 2

5. Set a compression gauge to one of the spark plug holes.
6. Crank the engine with the throttle valve fully open and measure the compression pressure.

Standard value (at engine speed of 200 r/min): 1,560 kPa (226 psi)
Minimum limit (at engine speed of 200 r/min): 1,130 kPa (164 psi)

7. Measure the compression pressure for all the cylinders, and check that the pressure differences of the cylinders are below the limit.

Limit: 98 kPa (14 psi)

8. If there is a cylinder with compression or a compression difference that is outside the limit, pour a small amount of engine oil through the spark plug hole, and repeat the operations in steps 6 to 8.
(1) If the compression increases after oil is added, the cause of the malfunction is a worn or damaged piston ring and/or cylinder inner surface.
(2) If the compression does not rise after oil is added, the cause is a burnt or defective valve seat, or pressure is leaking from the gasket.

9. Connect the crankshaft position sensor connector.
10. Install the spark plugs and ignition coils.

pic 3

11. Use the scan tool MB991958 to erase the diagnostic trouble codes.

NOTE: This will erase the diagnostic trouble code resulting from the crankshaft position sensor connector being disconnected.

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Let me know.

Joe

This video will show us how to fix it

https://youtu.be/vMwTzURWXmk

Please run down this guide and report back.

Try Actron -Google it or just take it to Autozone and have it scan for free the location see below

Good afternoon,

That light is a maintenance reminder light for changing the oil. It is programmed in the PCM to remind you to change the oil.

Roy

Have a local auto parts store retrieve the trouble code(s) for you. Could be anything from a failing sensor to something more major that is setting off the engine light.

Hi Natureboy,

You need a scan done to find out what is the cause of the check engine light coming on.

Based on your description, it could be the knock or O2 sensor.

THE 1ST THING TO DO IS HAVE IT SCANNED. MANY POPULAR AUTO PARTS STORES WILL DO THIS FOR FREE!

GET THE ACTUAL CODE(S) WRITE THEM DOWN. THE STORE MAY "OFFER" WHAT THEY MIGHT MEAN, BUT THEY CAN SOMETIMES BE INTERPRETED DIFFERENTLY. WITHOUT THE ACTUAL LETTERS AND NUMBERS, THIS END WILL BE IN THE DARK

THIS MAY BE A COINCIDENCE OR MAYBE SOMETHING THEY WAS AFFECTED DURING YOUR FIX

AN EXAMPLE OF "A CODE" IS "P0442", WHICH IS A SMALL EVAP LEAK, PROBABLY THE MOST COMMON REASON BEING CAUSED BY AN INCORRECTLY INSTALLED/ OR A BAD GAS CAP

YOU ONLY HAVE "ONE" CHECK ENGINE LIGHT. MAYBE HUNDREDS OF CODES. SO BE AWARE, YOU MAY HAVE MORE THAN ONE CODE, WHEN YOU GET IT SCANNED. SOMETIMES, ONE CODE "DOMINOES" OTHERS TO SHOW UP

THE MEDIC

I would bring it back to whatever garage performed these repairs, as its likely they just left a sensor connector unplugged. If they try to charge you, and give you a big story, let us know, and we can tell you whether or not its related to the repairs that were just made. Im sure its something simple.

Cat code being po420. Usually means the cat is bad. It isnt burning the unburned fuel left in the exaust gas, and once you get the code, they usually dont go away.

Hi jac852004,

This is a service reminder which will show after a certain mileage and is no cause for alarm.

Get the service done and resetting it will do the job.

As for the gear changes, you might need to scan the TCM for any error codes. Sometime a change of ATF can do the job.