[QUOTE=dyezak;8260504]1. Your plug gap is jacked up. Get them all the same, and all around .22-.24, blowing out spark will make you breakup.

2. Did you get tuned on a dynojet? Sounds like the more load you put on the car the worse the problem is (everything is ok in 3rd, but breaks up in 4th, etc). Dynojets (in my opinion) aren't for tuning, they don't load up a car properly. The normal dynojets without an upgrade have rollers equivelant to 2100lbs (2500lbs with the increased HP kit). I have a feeling that your car is about 3300lbs, so the loading will be completely different. On a dynapak, mustang, and most other dyno's the tuner can adjust the load and get a more realistic load on the engine resulting in a more accurate tune in real world conditions. Dynojets are really a measuring tool.[/Q

ill make sure to gap my plugs to .22 and see if that stops the problem. i have been tuned by this tuner many times on the dyno jet. I have yet to ever of had a problem this is the first time im not on stock ecu and on a AEM 2 ems. If it keeps breaking up ill bring the car back and have them look at the tune. But like i said i doubt its something with the tune more likely the plugs but we will see ..

 

Plenty of very highly regarded tuners on here use dynojets to tune everyday, and people aren't having any problems.

That's a stupid misconception due mainly because of ignorance or peoples lack of knowledge of how a dynojet really works.

 

i agree i don't think it has anything to do with the dyno. It might be something with the tune, maby the new plugs were thrown in after the tune and not gaped right. there are a few thing's it might be but like i said. i will gap the three plugs down to .22 and i think that will help alot .

 

i re gaped the plugs to .022 and and put them in. I only got to do one 3rd gear pull but the pull was clean with 0 break up. So the problem is fixed for now if it happens again ill get a buschur coil pack.

 

alright well the closer gap didn't end up fixing the problem. I was driving around last night and on a couple of the pulls it broke up pretty good. I was wondering if a got the hks DLI 2 ignition would i need to go get re tuned for it? I know the buschur Coil on plug ignition is better but i'm not trying to blow 1000 on ignition right now.

 

i,m having the same problem basically, aamem version 1, stock ignition plugs at 24 tuned on MD and did'nt break up, third gear pull to 8000 rpm. i too am going to up grade to cop but i have bigger problem know! my intake cam snapped and bent some valves thank god bottom is ok cam was m2 got kelfords going in so i'll be starting over to get this thing back on track thats why i am very interested in your situation! pls keep us posted good luck. sounds like you have a very nice set-up

 

i'm getting the spooling up cop good reviews and good price whats been done to your head? sometimes valve float will cause break-up?

 

I have a stock head with just hks 272 cams so i doubt it has anything to do with the head. the car only has 33k miles on the stock head anyway. Even if i got the buschur coil on plug ignition would i need to get re tuned or is it fine just to throw it on?

 

i love some of the advice people give on here.....

Nobody has mentioned one of the important questions... Are you knocking? If you are still on stock ECU and your car is knocking then for every 3 counts of knock the stock ECU will pull 1 degree of timing. I dont know if you turned up the boost at all after you got tuned but if you did than that could be a very likely culprit. Your car will brake up when you get on it because your ECU is pulling timing. Has your car done this ever since you got tuned? Did you change the gas you were using? You could have gotten a different brand of gas that is not exactly the same octane. Hell you could of even mistakenly put 87 or a lower octane pump gas in the car. Lets figure the root cause out before you go throwing parts at it trying to fix it.

All of these guys are right about the gapping though.

Also more than likely you are not going to need an upgraded ignition. Do a search, i have seen plenty of EVO's on these forums that still run stock ignition making bigger HP. Hell i know two big HP EVO's right now here in Phoenix making over 700 WHP and running stock ignition no problems.

 

I agree and disagree with you evolancer - just because a few cars are making big power on the stock ignition doesn't mean that his car will be the same.

you know that if you bolt on the same turbo to 2 different cars with the same mods that the power will not be the same....

Every car reacts differently to modifications - I would upgrade the ignition if I were you, and do not get the HKS DL11 - I went through 3 HKS ignition boxes before I got one to work, switched over to a COP and that fixed all issues....

He fixed one problem with the gap - What I would do is turn down the boost once, if you are running 30lbs of boost drop it down to 15-20 and go do some pulls and see if you still break up.

At a stock boost level or slightly below, you car should not break up at 20lbs of boost

I had this problem on my car where at 30lbs of boost which was were it was tuned for, the hks DL11 couldn't handle it, I dropped it down to 20 lbs of boost and it went away and it it drove and pulled great.

At that point, i switched out to a buschur cop and it ran great at 30lbs. try that first to see if that changes anything.

 

Spark Tech call it a day you will not have that problem anymore

 

everyone here is saying "SPARK" problems.
What about fuel?

lower the boost/power until you get a double pumper. that power output will be right on the limit and if you're running out of fuel up top, causing problems, you could blow your engine.
your fuel pressure might be dropping through the floor.

 

My tuner said i was running out of fuel. So they lowered the boost but maby im still running out of fuel? I have a built motor so hopefully i didn't do any damage. But im going to order a double pumper setup asap.

 

[QUOTE=evolancer04;8345483]i love some of the advice people give on here.....

Nobody has mentioned one of the important questions... Are you knocking? If you are still on stock ECU and your car is knocking then for every 3 counts of knock the stock ECU will pull 1 degree of timing. I dont know if you turned up the boost at all after you got tuned but if you did than that could be a very likely culprit. Your car will brake up when you get on it because your ECU is pulling timing. Has your car done this ever since you got tuned? Did you change the gas you were using? You could have gotten a different brand of gas that is not exactly the same octane. Hell you could of even mistakenly put 87 or a lower octane pump gas in the car. Lets figure the root cause out before you go throwing parts at it trying to fix it.

All of these guys are right about the gapping though.

Also more than likely you are not going to need an upgraded ignition. Do a search, i have seen plenty of EVO's on these forums that still run stock ignition making bigger HP. Hell i know two big HP EVO's right now here in Phoenix making over 700 WHP and running stock ignition no problems.[/QUOTE


Did you read the thread? he says he has AEM v2.

Take a good look at the plug wires I had an issue with them before,especially if you removed them by pulling on the wire. Also does the problem seam more present if its most or raining out,if you even drive that in the rain lol