Shaking at a full load of boost and stalling on a cold start?
#1
Newbie
Thread Starter
Shaking at a full load of boost and stalling on a cold start?
Hey everyone, I have a 2006 Evo MR. It's e85 tuned, it has 1400cc injectors, cosworth m3 cams, stage 2 clutch and a bunch of other mods I can list off if necessary. All the tuning has been done by a professional tune shop.
It all started after I changed my battery, not sure if this is relevant or not, but when I started my car after work the next day the rpms went up to 2k then started dropping down until the car stalled out. I had to rev it to keep it on and eventually it went back to normal. It was acting like it was on the wrong map (91 instead of e85) but it wasn't. It's been doing this every cold start since (3 days). I thought it was the MAF or ECU at first but it's not throwing a code. It has a stock ECU that's been tuned. And this only happens during a cold start.
Then I noticed surging in between gears and it does not drive well up hills. What really made me concerned though was when I was in 5th or 6th gear at around 70% throttle and a full load of boost the front of the car starts to violently shake until I release the gas.
I have used the search function and I see most people said the shaking is from the clutch which would make sense, but I haven't seen anyone mention the idle problem along with it.
Does anyone know if this is all related or what?
It all started after I changed my battery, not sure if this is relevant or not, but when I started my car after work the next day the rpms went up to 2k then started dropping down until the car stalled out. I had to rev it to keep it on and eventually it went back to normal. It was acting like it was on the wrong map (91 instead of e85) but it wasn't. It's been doing this every cold start since (3 days). I thought it was the MAF or ECU at first but it's not throwing a code. It has a stock ECU that's been tuned. And this only happens during a cold start.
Then I noticed surging in between gears and it does not drive well up hills. What really made me concerned though was when I was in 5th or 6th gear at around 70% throttle and a full load of boost the front of the car starts to violently shake until I release the gas.
I have used the search function and I see most people said the shaking is from the clutch which would make sense, but I haven't seen anyone mention the idle problem along with it.
Does anyone know if this is all related or what?
#2
Evolved Member
iTrader: (23)
On a dual map tune when the battery is disconnected the Evo will switch to the default map. Most Evos have their default map set to the 91 map. If you are 100 percent sure that the map is correct then you might have a major boost leak or a missing electrical connection.
For now I suggest not driving the Evo at WOT (wide open throttle). If you have some time this weekend I can take a look and do a boost leak test to narrow down the issues.
Also another issue could be you got a bad batch of E85. Its rare for that to happen but it could cause issues like this.
For now I suggest not driving the Evo at WOT (wide open throttle). If you have some time this weekend I can take a look and do a boost leak test to narrow down the issues.
Also another issue could be you got a bad batch of E85. Its rare for that to happen but it could cause issues like this.
Last edited by deylag; Apr 13, 2015 at 09:18 PM. Reason: Added more details.
#3
Newbie
Thread Starter
On a dual map tune when the battery is disconnected the Evo will switch to the default map. Most Evos have their default map set to the 91 map. If you are 100 percent sure that the map is correct then you might have a major boost leak or a missing electrical connection.
For now I suggest not driving the Evo at WOT (wide open throttle). If you have some time this weekend I can take a look and do a boost leak test to narrow down the issues.
Also another issue could be you got a bad batch of E85. Its rare for that to happen but it could cause issues like this.
For now I suggest not driving the Evo at WOT (wide open throttle). If you have some time this weekend I can take a look and do a boost leak test to narrow down the issues.
Also another issue could be you got a bad batch of E85. Its rare for that to happen but it could cause issues like this.
I should be free this weekend. I might bring it to fftec on Thursday because it's been giving me anxiety not knowing what it is and they're the ones that did the tune.
You think every thing is related though?
#4
Evolved Member
iTrader: (23)
You are in good hands if you take it to FFtec. They will be able to tell you what's going on with the Evo. Hopefully its a small issue.
Sometimes small problems can cause big changes in the drivability and in other cases you can catch them before they turn into big problems. There are few things that can be diagnosed from my arm chair most of the time its when I start working on it that I find out the real issue.
Sometimes small problems can cause big changes in the drivability and in other cases you can catch them before they turn into big problems. There are few things that can be diagnosed from my arm chair most of the time its when I start working on it that I find out the real issue.
#5
Newbie
Thread Starter
You are in good hands if you take it to FFtec. They will be able to tell you what's going on with the Evo. Hopefully its a small issue.
Sometimes small problems can cause big changes in the drivability and in other cases you can catch them before they turn into big problems. There are few things that can be diagnosed from my arm chair most of the time its when I start working on it that I find out the real issue.
Sometimes small problems can cause big changes in the drivability and in other cases you can catch them before they turn into big problems. There are few things that can be diagnosed from my arm chair most of the time its when I start working on it that I find out the real issue.
Trending Topics
Thread
Thread Starter
Forum
Replies
Last Post
Viet-Speed
General Engine Management / Tuning Forum
4
Aug 25, 2014 10:28 AM
Gsxtremedsm
Evo Engine / Turbo / Drivetrain
6
Oct 28, 2012 03:47 PM
SilverLanEvo
General Engine Management / Tuning Forum
4
Jul 5, 2011 10:52 AM