'03 2.4 Eclipse issue(s)

Asked by Sep 26, 2015 at 10:51 PM about the 2003 Mitsubishi Eclipse

Question type: Maintenance & Repair

Have owned this car for 9 years. No issues before this. Drove to work one day and car was running fine. Came out after work (8 hours later) and it was sputtering and hesitating on acceleration. Now, car wont start after sitting for 6-8 hours. Found (coincidence?) that when I unplug the MAF, it starts and idles but wont rev. Turn engine off and plug back in MAF. Restart engine. Idle is very rough and bucks and jerks when shifting into gear (automatic trans). After several seconds (30 - 60), rough idle stops and can drive without bucking or jerking but hesitates on acceleration. If I lightly press on the gas pedal, the car will accelerate but slowly. While sitting at stop light, can feel engine bog down and hesitation / sputtering starts again. Put trans in neutral and rev engine and it comes out of the sputtering but still hesitates on acceleration. Has thrown many codes during this time. 1st code was for 02 sensor so I replaced it but there was no change in hesitation.  Since then, it has thrown the following codes: Bank 1 too lean, Bank 1 no activity, Intake Air Temp Sensor High Input, MAF A Circuit Low Input), STFT increases each time I drive it (up to +28 now). LTFT is 12.5. Engine Load % is up to 70%. Since then, replaced MAF, both coil packs, plugs, & wires. Sprayed carb cleaner on all vacuum lines and around injectors, no change in running condition. Replaced thermostat. No change in running condition. Fuel pump is 2 yrs old. With vehicle running, unplugged each fuel injector, one at a time, and it ran worse. Unplugged MAP when vehicle running, made no difference in how it ran. Unplugged vacuum lines, one at a time, and it ran worse. Code reader shows RPMs during cranking when engine wont fire and when it does fire, so it does not appear to be crank sensor. It starts when warm so it does not appear to be cam sensor (I had cam sensor issues a year ago and it would only start when engine was cold / would not start when engine was warm). Both coolant temp and IAT?? sensors appear to be working correctly. Any ideas what might be causing the issue? MAP sensor? EGR valve? Coolant Temp Sensor? Internal Air Control valve? ????

3 Answers

565

if my memory is right your motor has a tin intake . look very hard at where the throttle body bolts up just behind the flang they crack , brake off i have also seen alot of proplems with the throttle body coming apart. IT SOUNDS LIKE A MAJOR VACUUM LEAK. your ltft is maxed and the stft is tring to compensate. these motors vibrate bad and cause many problems. sounds like you have a scanner. spray carb cleaner around throttle body and watch your trims a major change might lead you in the right direction

2 of 2 people found this helpful.

Hwy I have 2003 as well. Had same issue. I had replace the middle screw and gasket. It was so worn. Today I picked up emission valve because after whole idle no start jerk event for so.e time the check engine light preventing me from inspecting and tagging so have replace that and many more things. Good car though. Anyway be sure check the idle set screw and it's gasket and reset idle speed with particular turn of new one..it sets behind the engine at the top ..just wanted help out if I could. Good luck

But I see this us old post. Shoot. Sorry

Your Answer

Add photo

Related Questions

  • '03 2.4 Eclipse issue(s) 3 answers

    Have owned this car for 9 years. No issues before this. Drove to work one day and car was running fine. Came out after work (8 hours later) and it was sputtering and hesitating on acceleration. Now, c...

    2003 Mitsubishi Eclipse

    -

    Maintenance & Repair

  • 03 eclipse 2 answers

    I have an 03 eclipse that runs great until i get it up to 4500- 5500 rpms,then the motor bogs down and check engine light comes on.let off the gas and runs fine.ill reset the computer and light w...

    2003 Mitsubishi Eclipse GS

    -

    Maintenance & Repair

  • 03 eclipse transponder key 2 answers

    I am looking at buying this car but they lost the key. They said that they had a another steering column for it. Can I use the key off of the other steering column from another 03 eclipse to start ...

    2003 Mitsubishi Eclipse RS

    -

    Maintenance & Repair

  • Half to full throttle bog on 2.4 Eclipse 8 answers

    I have a very well maintained '05 Eclipse with the 2.4, manual trans. My problem comes and goes. Problem is: At half to full throttle the engine will bog down & fall flat on its face, I can even get...

    2005 Mitsubishi Eclipse GS

    -

    Maintenance & Repair

  • Unknown fluid leak, '03 Eclipse GTS 2 answers

    I purchased a 2003 Eclipse GTS 3.0L V-6 with manual tranny, 107800 miles on it, a couple of weeks ago for my daughter to drive back and forth to college. The guy I bought it from was the 2nd owner, an...

    2003 Mitsubishi Eclipse GTS

    -

    Maintenance & Repair

Eclipse

Looking for a Used Eclipse in your area?

CarGurus has 1,297 nationwide Eclipse listings starting at $1,000.

ZIP:

Search Mitsubishi Eclipse Questions

Mitsubishi Eclipse Experts

#1 dandyoun
dandyoun
Reputation 1,610
#2 Daniel Foster
Daniel Foster
Reputation 730
#3 Tom Demyan
Tom Demyan
Reputation 420
View All

Related Models For Sale

Used Mitsubishi Eclipse Spyder
15 Great Deals out of 518 listings starting at $1,750
Used Ford Mustang
543 Great Deals out of 45,845 listings starting at $1,999
Used Mitsubishi Lancer
50 Great Deals out of 6,260 listings starting at $2,000
Used Mitsubishi Lancer Evolution
17 Great Deals out of 495 listings starting at $13,998
Used Nissan 350Z
52 Great Deals out of 1,206 listings starting at $2,899
Used Honda Civic
814 Great Deals out of 88,107 listings starting at $1,299
Used Chevrolet Camaro
244 Great Deals out of 31,194 listings starting at $369
Used Honda Civic Coupe
210 Great Deals out of 16,555 listings starting at $1,100
Used Mazda RX-8
17 Great Deals out of 360 listings starting at $1,299
Used Toyota Celica
4 Great Deals out of 367 listings starting at $1,511
Used Honda Accord
948 Great Deals out of 77,739 listings starting at $899
Used BMW 3 Series
941 Great Deals out of 30,258 listings starting at $1,000

Used Cars For Sale

2012 Mitsubishi Eclipse For Sale
5 Great Deals out of 61 listings starting at $6,395
2011 Mitsubishi Eclipse For Sale
53 listings starting at $6,400
2010 Mitsubishi Eclipse For Sale
5 listings starting at $8,500
2009 Mitsubishi Eclipse For Sale
3 Great Deals out of 140 listings starting at $3,500
2008 Mitsubishi Eclipse For Sale
4 Great Deals out of 174 listings starting at $3,630

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.