jpr98

hey guys,


So this is my 2nd request for help in one week, im sure some of you guys are thinking oh god does this kid have issues. This one has been happening since I got the car and apparently has happend since it was tuned last, i dont have access to the dyno sheet at the moment but if you guys need it i can upload a photo when i get home from work.

So basically when I go into 5th Gear below 140km/h (86m/h) i get mas power loss as if it has gone into limp mode but I can go above 80km/h so im guessing its not that? and my engine light comes on, but after I restart the car the engine light goes away and I get all power back, I did a scan on the car to get the error codes that caused the engine light to come off (see attached picture) does anyone have any ideas? Personally I think its the tune but I dont want to go pay for a new tune just to find out its something else.

Evo VI.

Faulty MAF, try and test one on the car if you can borrow One.

jpr98

how much do they usually go for?

jpr98

ok so met up with a guy from the local evo group today, and we couldnt get it to trip at all :/ he's lent me a MAF, we have also limited the boost cut limit so ill see if that does anything

jpr98

Update:
MAF didn't change anything and neither did boost cut, and to make things worse its moved from 5th to 4th. Guessing it could be electrical?

barneyb

The air volume, intake temperature and barometric pressure sensor are all located in the MAF. When it goes faulty it should affect mixture. Bad mixture will set a p0300. A miss will cause the ECU to start shutting off fuel, searching for the offending cylinder.

jpr98

Just had it happen again the only error code im getting now is P0300

jpr98

Also how do I find said cylinder?

gsrboi80

iTrader: (38)

Search P0300 on here and you will come up with a plethora of information going back to 2003 when the EVO VIII hit US shores.

Code can be ignition system related however once that is ruled out many cars were still plagued with the issue. Mitsubishi's supposed findings were that drivetrain harmonics causes the code to set, in turn the car will stutter a bit if you are on the gas. Lift off accelerator and then back on and the car will run fine.

Mitsubishi's answer/attempted fix was 2 rom updates for the 03 models. Worked for some not for others, since then with the advancement of stock ECU tuning on this platform most just simply disabled the code routine and never worry about it again

barneyb

The computer shutting off various cylinders looking for an offending cylinder doesn't necessarily mean there is one. P0300 means the computer thinks there is a miss. P0301 thru P0304 tells you it has discovered which cylinder(s).

BTW, many owners will have never encountered this computer routine - where it goes into a shudder or what is described here as a limp mode. The search routine was removed from later EVOs. My 2003 still had it.

jpr98

I might just talk to my tuner and see if I can just have the code disabled then

barneyb

In 2005 Mitsubishi issued a TSB on the P0300 problem. The TSB states that if there is nothing mechanically wrong with the engine (no miss) then replace the input shaft and 5th gear. The TSB applied to Evos produced a couple of years earlier including my 2003. I doubt that this is the whole story. Whatever the true cause or causes, Mitsubishi fixed the problem in later vehicles.

At about 15K miles I started noticing a vibration in 5th gear and I started getting a P0300. I killed the code in the periphery bits and drove another 100K miles with no problem except the vibration in 5th gear remained but never got worse. Tire selection seems to have a lot to do with how much vibration is felt. I'm presently swapping out the transmission. I wonder how far the original transmission would have gone but will never know.

jpr98

hmm, weird that every mechanic ive taken it to has had no idea about that, although I guess it is hard to find one that doesnt want to try get some money out of you. As for the vibrations, I havent noticed any vibrations in 5th or anyother gear for that matter (that ive noticed)

barneyb

RANDOM MISFIRE (DTC P0300, P0301, P0302, P0303, OR P0304)
TECHNICAL SERVICE BULLETIN
Reference Number(s): TSB-06-13-004, Date of Issue: April 01, 2006
MITSUBISHI: 2003-2005 Lancer Evolution
Superceded Bulletin(s): TSB-05-13-003, Date of Issue: February 01, 2005
PURPOSE
NOTE: This TSB supercedes TSB-05-13-003, issued February, 2005, for new diagnosis and repair information.


If the Check Engine light comes on and DTC P0300 (Random Misfire) or P0301, P0302, P0303, or P0304 is set in the PCM, the cause may be one of the following:

Fuel injection/Ignition system
PCM software
Worn input shaft 5th gear spline, misjudged by the PCM as a misfire
To eliminate this condition, follow the diagnosis and repair procedures described below. These procedures are outlined in flowcharts in ATTACHMENT A (2003-2004 MODELS ONLY) and ATTACHMENT B (2005 MODELS ONLY).

AFFECTED VEHICLES
2003-2005 Lancer Evolution equipped with 5-speed transmission produced before 7/04

PROCEDURE
Connect the MUT-III scan tool. Confirm DTC P0300 (Random Misfire) or P0301, P0302, P0303, or P0304 is set in the PCM.
Read and record the freeze frame data for coolant temperature, engine rpm, vehicle speed, and engine load when the DTC was set.
Coolant temperature higher than 167 degrees F (75 degrees C)
Engine rpm more than 2500 rpm
Vehicle speed more than 60 mph
Engine load less than 80%
If DTC set conditions do not match the above criteria:
2003-2004 Models : Do not continue with this bulletin procedure. Refer to the appropriate DTC diagnosis procedures in Group 13 of the service manual.
2005 Models : Go to Step 3.
If the DTC set conditions match the above criteria:
2003-2004 Models : Erase the DTC and then go to Step 3.
2005 Models : Go to Step 6 for parts replacement.
Use the MUT-III to check the PCM ROM ID:
2003 Models :
If the ROM ID is JM941715 or above , go to Step 6 for parts replacement.
If the ROM ID is NOT JM941715 or above , reprogram the PCM as described in Step 4 below.
2004 Models :
If the ROM ID is JM964111 or above , go to Step 6 for parts replacement.
If the ROM ID is NOT JM964111 or above , reprogram the PCM as described in Step 4 below.
2005 Models :
If the ROM ID is 969313 or above , go to Step 5 to perform a test drive.
If the ROM ID is NOT 969313 or above , reprogram the PCM as described in TSB-06-13-005. This will enable all freeze frame data to be read by the MUT-III. Then go To Step 5 to perform the test drive.
2003 and 2004 Models Only:
If the ROM-ID is not JM941715 or above (2003 models) or JM964111 or above (2004 models), reprogram the PCM, using MUT-III database version N06031 or greater. After reprogramming is completed, the new ROM ID will display. Note this information, and verify that the new PCM p/n and ROM ID are the same as those listed below.
IMPORTANT: Models equipped with ABS: With the ignition key OFF, unplug the ABS fuse (7.5 amp fuse in the junction box in the passenger compartment ). Refer to the service manual for exact fuse location in the box.


DISPLAY - ON MUT-III AFTER REPROGRAMMING
DISPLAY ON MUT-III AFTER REPROGRAMMING
MODEL PCM PART NUMBER MUT-III REPROGRAMMING DATABASE ECU PART NUMBER ROM ID (Engine) VENDOR #
2004 Lancer Evolution MN191022 VN04122 MN191022 964111 E6T34888H3
2003 Lancer Evolution MN132874 VN04121 MN132874 941715 E6T34880H3


Using a ball-point pen, enter the appropriate PCM part number, vendor number, ROM ID#, this TSB number (TSB-06-13-004), your dealer code, and the current date on the Engine Compartment / Control Module Label (part no. MSSF-024G-00).
Fig. 1: Identifying Control Module Label

Carefully remove all dirt and oil from a vacant area near the VECI label on the underside of the hood, and affix the Engine Compartment label.
Affix the Control Module label to the PCM.
Models equipped with ABS: Reconnect the ABS fuse. Confirm no DTCs are set.
Continue with Step 5 to perform the test drive.
TEST DRIVE
Test drive the vehicle in both 4th gear and 5th gear at highway speeds as follows:

NOTE: Disengaging the clutch during the test drive will change the phasing between the engine and the transmission, and indicate a possible input shaft problem.


a In 4th gear, drive above 60 mph, or as fast as local regulations permit. Then slightly release the accelerator pedal for 10 seconds. During the 10 seconds, press and quickly release the clutch. Repeat this at least two times.
In 5th gear, drive above 60 mph, or as fast as local regulations permit. Then slightly release the accelerator pedal for 10 seconds. During the 10 seconds, press and quickly release the clutch. Repeat this at least two times.
If the Check Engine light does NOT come on during the test drive, do not continue with this bulletin procedure.
If the Check Engine light comes on during the test drive, read the DTCs and freeze-frame data:
If a misfire DTC is set and the freeze-frame data matches the criteria in Step 2, go to Step 6 for parts replacement.
If the freeze-frame data does NOT match the criteria in Step 2, refer to Group 13 of the service manual for diagnosis of the DTC that was originally set. Do not continue with this bulletin procedure.
Replace both the input shaft and the input 5th gear, using the parts listed in the PARTS INFORMATION section of this bulletin. Refer to Group 22 in the service manual.
Install a new input shaft oil seal.
After parts replacement, repeat the test drive described in Step 5. Verify that the Check Engine light does not come on.
Fig. 2: Identifying Input Shaft Oil Seal

PARTS INFORMATION
Use the Genuine Mitsubishi Parts listed below:

PARTS INFORMATION
Description Part Number
Input Shaft MN107628
Input 5th Gear MN107624
Input shaft Oil Seal MD746516


WARRANTY INFORMATION
PCM Reprogramming for DTC P0300/P0301/P0302/P0303/P0304
Nature Code: 16D Cause Code: 490

Labor Operation No . 13850113 Time Allowance: 0.3 hr.

Warranty Coverage: 8 years / 80,000 miles Emissions warranty

Input Shaft and Input 5th Gear Replacement
Nature Code: 16D Cause Code: 150

Labor Operation No . 2220109G Time Allowance: 8.2 hrs.

Warranty Coverage: Powertrain coverage (5 years/60,0000 miles or 10 years/100,000 miles depending on model year, vehicle sale date, and if original owner.

ATTACHMENT A (2003-2004 MODELS ONLY)
Fig. 3: Freeze Frame Data Flow Chart (2003-2004 Models)

ATTACHMENT B (2005 MODELS ONLY)
Fig. 4: Freeze Frame Data Flow Chart (2005 Models)

Rocky_D

this site amazes me daily. I just bought an 03 evo with some 5th gear vibration. love that i am able to find this information with just a few taps of the keyboard and clicks of the mouse. I am assuming at this point in time mitsubishi wont do anything about this correct? even if they did do something im sure id have to pay out of the butt.