Bad ECU reflash?
Thread Starter
Evolving Member
Joined: Sep 2003
Posts: 100
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From: Los Angeles, CA
Originally Posted by race17k
def. do a boost leak test first! i was in the same situation and had multiple boost leaks! from now on thats the first thing i will always look for when power feels down...
Na, that's the first thing I checked. Plus, I have my boost gauge hooked directly up to the vacuum on the intake manifold, and the gauge shows no sign of a boost leak.
Its probably the 4th gear 1 point richen up that ScrappyJack logged and wasnt sure why it was there. You might refer to that thread for some answers.
https://www.evolutionm.net/forums/sh...d.php?t=205121
https://www.evolutionm.net/forums/sh...d.php?t=205121
Originally Posted by djd24
Without my safc, my afr's were all over the place during a pull....the flash blows...it's way off. But, then again, it was a mail-in flash that was done possibly assuming no mods.
The car pulls very good 1st through 3rd. At the track, it seems to kind of die out in 4th. Somehing seems screwy with the timing...we'll see.
The car pulls very good 1st through 3rd. At the track, it seems to kind of die out in 4th. Somehing seems screwy with the timing...we'll see.
There are many cases where people remove parts a car is tuned for when they trade it in and leave the original flash
and cases where people who have a flash for a long time add parts without getting a retune
I would start with the obvious - boost leaks etc and thenj perhaps send me the ecu to look at and see if its set up for your mods
Thread Starter
Evolving Member
Joined: Sep 2003
Posts: 100
Likes: 0
From: Los Angeles, CA
Originally Posted by DynoFlash
There are many cases where people remove parts a car is tuned for when they trade it in and leave the original flash
and cases where people who have a flash for a long time add parts without getting a retune
I would start with the obvious - boost leaks etc and thenj perhaps send me the ecu to look at and see if its set up for your mods
and cases where people who have a flash for a long time add parts without getting a retune
I would start with the obvious - boost leaks etc and thenj perhaps send me the ecu to look at and see if its set up for your mods
Point taken...that is what I had implied in my previous statement. However, I am not a fan of mail-in flashes. I do believe that every car is individually different, so I rather have a an in-person road/dyno tune. But, I don't feel like driving seven hours away to do so, so I will be using a tuner who is near me for this.
Thread Starter
Evolving Member
Joined: Sep 2003
Posts: 100
Likes: 0
From: Los Angeles, CA
Originally Posted by JohnBradley
Its probably the 4th gear 1 point richen up that ScrappyJack logged and wasnt sure why it was there. You might refer to that thread for some answers.
https://www.evolutionm.net/forums/sh...d.php?t=205121
https://www.evolutionm.net/forums/sh...d.php?t=205121
Bingo. Thanks.
This is exactly what mine is doing. My AFR will be in the low 11's in first and second, but will go down to 10.0 in 4th. Another very interesting point...this only happens during a 1st through 4th gear accleration. Pulls in any given gear seam very similar. It is only when I go from 1st, to 2nd, to 3rd, to 4th in a 0-100 acceleration that I see this wacky AFR change.
With a modded used 03 Evo (in good mechanical condition, hopefully) your probably on the right track with a Ctrl/Alt-Delete ECU ROM reset to stock. You have no idear what the flash was adjusted for and you will be able to start new with a base to build on.
