'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? ????

1 Answer

525

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

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

Search Mitsubishi Eclipse Questions

Mitsubishi Eclipse Experts

#1 dandyoun
dandyoun
Reputation 1,540
#2 Daniel Foster
Daniel Foster
Reputation 680
#3 FordNut
FordNut
Reputation 360
View All

Related Models For Sale

Used Mitsubishi Eclipse Spyder
10 Great Deals out of 635 listings starting at $2,995
Used Ford Mustang
724 Great Deals out of 38,165 listings starting at $1,750
Used Mitsubishi Lancer
70 Great Deals out of 5,936 listings starting at $2,996
Used Mitsubishi Lancer Evolution
15 Great Deals out of 702 listings starting at $14,977
Used Honda Civic
1,131 Great Deals out of 63,727 listings starting at $995
Used Nissan 350Z
79 Great Deals out of 1,441 listings starting at $4,500
Used Chevrolet Camaro
664 Great Deals out of 38,930 listings starting at $2,995
Used Honda Civic Coupe
325 Great Deals out of 16,741 listings starting at $1,500
Used Mazda RX-8
19 Great Deals out of 421 listings starting at $1,495
Used Toyota Celica
7 Great Deals out of 381 listings starting at $1,500
Used Infiniti G35
121 Great Deals out of 3,571 listings starting at $2,250
Used BMW 3 Series
1,773 Great Deals out of 40,386 listings starting at $1,350
Used Hyundai Tiburon
9 Great Deals out of 637 listings starting at $1,500

Used Cars For Sale

2012 Mitsubishi Eclipse For Sale
3 Great Deals out of 69 listings starting at $5,999
2011 Mitsubishi Eclipse For Sale
3 Great Deals out of 54 listings starting at $4,995
2009 Mitsubishi Eclipse For Sale
5 Great Deals out of 149 listings starting at $3,950
2008 Mitsubishi Eclipse For Sale
12 Great Deals out of 215 listings starting at $3,300