I have a lil problem. My car is throwing a multiple misfire code and egr insuffenient flow code. I think it has something to do with the ecu. well at least the multiple misfire code does. When having the ecu custom tuned, would they solve the prolem for me? I have the dynoflash base flash. My car has bout 34k miles. I changed the spark plugs and wires already. Hadn't changed the coils yet though. Any idea's?

 

ok, exactly when did this happen? after you changed your spark plugs?

 

and yes, a tune will sovle it. they will run a scanner through your system. OBDII will bring up a problem code and they'll fix it.

 

The cel came on before I change the spark plugs and wires. Would it help clear the egr insuffenient flow. If not, How do i clean it to clear it?

 

these problems have to be diagnosed properly...

who is the they'll, that will fix it????? ^

after clearing fault memory have they returned, do you feel a miss???? more info... not sayin what ever the problem is that a "flash" wont fix it but the problems should be diagnosed correctly

 

Check all your vacuum lines. ALL your lines, make sure you get the ones behind and under the intake manifold.

 

He wasnt asking if a "tune-up" will fix it. He was asking if a flash will fix it and the answer to that is probably not.

Check for boost leaks as posted above

The EGR code is probably a tip as to what your P0300 is. Since the P0300 can be so many things, try and figure out the EGR code first. Clean your EGR valve, there is a link. It is a possible cause of the P0300 as well.

EGR Code
http://www.obd-codes.com/trouble_cod...n-flow-egr.php

P0300 Code
http://www.obd-codes.com/trouble_cod...e-detected.php

 

i kindda dis-agree, it is a lack of egr flow and is not likley to cause a missing condition...

as for the random mis... you did just change plugs... did you gap them propperly??? as i stated below more info is needed to try and be helpful... drivability, conditions ect.

 

Did you click the EGR code link that I provided? Says right there a clogged EGR can cause P0300. Carbon build up in the cylinders can also cause P0300 as well as a million other things. I recently had a P0300 issue on my IX, it ended up being a faulty fuel injector but since he has 2 codes they are probably related. Also, he had the code before he changed plugs and wires.

 

no i did not read your "link" until you just asked me to now. i do not need to read a link to fix a car, i have many ase and bmw certs. under my belt and dont need a link. been fixen cars for a long time!

i will never say that something CANT happen, i fix cars and know better! i said not likley and still stick to that! an abundance of egr ie: stuck open will cause all kinds of problems like missing. that is not his problem he has a lack and if it wasnt for obd2 complience that car would like it very much so not to have exhaust gas ran through it over and over! it sets a fault because of emissions!

your link is wack and contradicts it's self read all of it its kindda funny!

dont argue w/ people... try and understand, maybe ask why i said that or disagreed its how we all get smarter

 

I'm not trying to argue with you nor am I using exclaimation points to end every sentance. I agree, normally a P0300 code is not the result of an EGR problem. Here's the thing, its an 06 and it probably doesnt have 2 unrelated problems. It probably has 1 that is causing the other. P0300 could be a ton of things and he already eliminated a few of the most likely causes (plugs and wires). A vacuum leak is still a strong possiblity. Do a leak test it may solve both of your problems if you have one.

EGR's valves can fail 2 ways. Stuck open or stuck closed.

An EGR valve that has failed, refuses to open (or the EGR passageway i the manifold is clogged) will allow elevated NOX emissions and may also cause a detonation (spark knock) problem.

v

 

Check the vacuum line on the back of the throttle body. The rubber lines pop off pretty easily. The EGR, if you have never seen it, is the small saucer shaped metal piece on the back of the TB that has two lines coming from it. Little link with diagram...

https://www.evolutionm.net/forums/at...9&d=1151778008

 

Most thread starters here for an EGR insufficient code always have a vaccum hose come off.
I would check that first as cfdfireman sugg.
As for random missfires...very common on earlier evo8's but hardly on 9's.
Do you have the "freeze frame" on when the code came up?

 

The misfire is noticeable at idle only. I dont feel it while driving. The car goes up to redline smoothly. I tried to unplug the battery and back on. The cel went a way but a while later, it'll turn back on. I just check the vacuum lines and i did find the egr line disconnected. I put it back on and zip tied it. Well I tried. I only had big zip ties and it seem to be big. I"ll go back to it later with a smaller one.

 

What's freeze frame?