'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? ????

4 Answers

645

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

I had the EXACT problem. The thing is, mine turned out to be a piece missing out of the throttle body. Like a little plug almost. I had someone looking under my hood who had the exact car and they noticed it missing and told me they swore there was something there, so he went and looked under his hood, and sure as shit. He took it off and put it on mine and it was good at new. No idea how it was removed, but it was. Just in case, it's located on the front of the throttle body(on the side facing the valve cover), towards the bottom of the throttle body. There was just a hole where you could tell something was supposed to be there.

Your Answer

Eclipse

Looking for a Used Eclipse in your area?

CarGurus has 1,177 nationwide Eclipse listings starting at $1,999.

ZIP:

Mitsubishi Eclipse Experts

  • #1
    dandyoun
    Reputation
    1,660
  • #2
    Daniel Foster
    Reputation
    740
  • #3
    Tom Demyan
    Reputation
    470
View All

Related Models For Sale

Used Mitsubishi Eclipse Spyder
23 Great Deals out of 482 listings starting at $1,900
Used Ford Mustang
559 Great Deals out of 36,550 listings starting at $1,500
Used Mitsubishi Lancer
57 Great Deals out of 5,722 listings starting at $1,699
Used Mitsubishi Lancer Evolution
8 Great Deals out of 586 listings starting at $13,980
Used Nissan 350Z
53 Great Deals out of 1,217 listings starting at $2,900
Used Chevrolet Camaro
467 Great Deals out of 31,525 listings starting at $3,550
Used Honda Civic
735 Great Deals out of 65,148 listings starting at $1,350
Used Mazda RX-8
18 Great Deals out of 383 listings starting at $1,200
Used BMW 3 Series
1,088 Great Deals out of 33,844 listings starting at $1,000
Used Honda Civic Coupe
174 Great Deals out of 12,868 listings starting at $1,695
Used INFINITI G35
66 Great Deals out of 2,882 listings starting at $1,350

Used Cars For Sale

2012 Mitsubishi Eclipse For Sale
63 listings starting at $6,495
2011 Mitsubishi Eclipse For Sale
5 Great Deals out of 52 listings starting at $4,988
2010 Mitsubishi Eclipse For Sale
8 listings starting at $6,980
2009 Mitsubishi Eclipse For Sale
113 listings starting at $3,891
2008 Mitsubishi Eclipse For Sale
9 Great Deals out of 179 listings starting at $1,999

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.