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Old 03-03-2008, 11:39 PM   #1 (permalink)
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Car: 03 EVO
Club Region: SoCal
Registered: Jan 2006
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hks dli 2

I am having problems with my car it tends to misfire usualy between 3 and 4 thousand rpm's especially in the freeway in 5th gear at partial throttle, I usually have to lete go of the gas and give it gas so the car runs good. The car started to do this after I got it flashed. Any how I bought new spark plugs ngk bpr8es and gaped them to .024 and installed the hks dli2 hoping it would fix the problem but it did not it might have got worse. Any how did I gap the spark plugs to low or has anyone had a simular problem. I istalled the stock spark plugs with the dli 2 and it just seems to have misfires it wont pull at wide open throttle corectly.


My Mods are bushur full 3" exhaust, no cat, bushur intake with hard pipe, turbo xs front mount, with ams lower pipe, evo mr dv, t bolt clamps, fp green 20g lt ported, ported exhaust manifold, ported intake manifold and throttle body by buschur, megan 02 housing, 750 cc injectore, fuel pump, magnecor 8.0 spark plug wires, hks dli 2,gsc 272, 272 camshafts, ecu flashed, hallman boost controller, exedy hd twin disk clutch. 331 whp on 91 octane 21 psi and 400 whp 386 torque c16 octane 25 psi.
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Old 03-03-2008, 11:42 PM   #2 (permalink)
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Old 03-04-2008, 07:04 AM   #3 (permalink)
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Car: 05 EVO
Timeslip: 13.2 @ 103.16
Dynosheet: 313whp/313 lb-ft
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How many miles?


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Old 03-04-2008, 12:15 PM   #4 (permalink)
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Quote:
Originally Posted by cul8rv8 View Post
The car started to do this after I got it flashed.
Then it sounds like you need to go back to this step. I'm not genious when it comes to flashes, but from my understanding Mitsu had a factory reflash for the '03 misfires. Who ever did the flash might not have used the right ROM(?)... maybe.
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Old 03-04-2008, 02:19 PM   #5 (permalink)
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Car: 05 EVO
Timeslip: 13.2 @ 103.16
Dynosheet: 313whp/313 lb-ft
Club Region: Rocky Mountain
Registered: Aug 2007
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I had misfires just the past month and the car would not start or run just right when it was cold. So we replaced the Coils and that solved my problem I am almost 60,000 on my car and I use this car as my DD and fun toy as well.
P.S. Lucas figured it out. I think the spark was just weak so that is what caused misfires.


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Old 03-04-2008, 04:52 PM   #6 (permalink)
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Are you actually feeling the misfires or are you getting the P0300 code while cruising? The 03's are notorious for picking up phantom knock and tripping the P0300 code. It's pretty well thought that the transmission is the source of the noise setting off the knock sensor. Shep Trans and TRE both have "fixes" for that. I have a TRE trans and I still get P0300 every once in awhile but not nearly as much as I did on the stock trans.

The Mitsu flash for this problem didn't do a darn thing for my car. Your flash may also be part of the culprit so I would do some logging and see what kind of knock-count you are getting in those RPM ranges. If it looks normal then I'll bet dollars it's the same gremlin that nearly all 03's have.


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Old 03-06-2008, 06:49 AM   #7 (permalink)
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Try BR7ES. Gapped at 26
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