2G Car breaking up on high rpm

[Bo0sTeD 4G63]

Hello everyone,

I am having an issue with my car breaking up at high rpms. It usually starts to break up at around 5k and doesn't stop. The rpms will still go up but it will break up all the way through. I have uploaded a log and a video so you can see. If there is anything else you guys can think of let me know and I will try to post it right away. I need to figure this out asap.

Click here to see a video of what the car does and sounds like when it starts to break up.

 

[Chumpaumpalumpa]

When did you last change your plugs, what are they, and what are they gapped at?

 

[Bo0sTeD 4G63]

I changed my plugs last week, they are NGK BPR6EGP, and they are gapped to .30

 

[ilogistics]

What kinds of mods do you have to your air supply and fuel supply? It sounds like fuel cut to me but I have no clue where you are at with engine mods.

 

[Denvario]

Sounds like a maf sensor or maf translator problem or a boost leak do a boost leak test first check the obvious things

 

[Bo0sTeD 4G63]

Sounds like a maf sensor or maf translator problem or a boost leak do a boost leak test first check the obvious things

I do not have a MAF I am running speed density, I did a boost leak test and found no leaks anywhere.

 

[Bo0sTeD 4G63]

What kinds of mods do you have to your air supply and fuel supply? It sounds like fuel cut to me but I have no clue where you are at with engine mods.

Check my profile

 

[ilogistics]

Lol. Have a good day. I hope you figure it out.

 

[GST with PSI]

What kinds of mods do you have to your air supply and fuel supply? It sounds like fuel cut to me but I have no clue where you are at with engine mods.

Check my profile

If you're going to tell people trying to help you to check your profile for mods, you should probably make sure it's a comprehensive list. Your mod list sucks, and it's too vague for anyone to actually use it to help you. Go update it: http://www.dsmtuners.com/threads/welcome-to-dsmtuners-now-go-create-a-dsm-profile.499707/

For starters, why aren't you logging your WBO2, MAP and IAT? Do you even have a WBO2 or IAT? You're profile says you have an AEM WB, but I don't see it configured in ECMLink. You need to configure ECMlink to log your sensors so you can actually make adjustments to the tune.

Your tune needs some work. If you want help, follow the instructions here and post them up in this thread: http://www.dsmtuners.com/threads/wa...r-receive-no-replies-from-the-wisemen.443297/

See here for what values to capture: http://www.dsmtuners.com/threads/list-of-values-to-log.444831/

How much boost are you running? I bet it's probably enough to need a colder plug. Plugs in the 6 heat range are for cars on near stock boost levels with minimal modifications. Your car probably isn't in this category based on what little information is in your profile.

 

[ilogistics]

Thanks GST. Basically said exactly what I was going to until his rather rude response. If you want people to help you they need the info. It hard enough for people to diagnose a broad issue like you describe without having to go back and forth with you about your mods and maintenance. You are lucky that GST is patient enough to help you out. Good luck!

 

[19gsx91]

A few things.

1. Your missing what size turbo you're running in your profile... judging by how laggy it is I'd assume something not in an MHI turbo

2. How old are your plug WIRES? and why (based on your level of mods) are you running BPR6 plugs? You should be running BPR7ES. gapped to at least .28

3. Why is your DA table so rich? It's possible it's a too rich misfire, You should be aiming for an 11.0 AFR, def not anything in the 9s.

EDIT: Oops GST beat me to it.

 

[DeadlyAKrunna47]

You maybe getting spark blow out. Usually high boost aplications cause this. Evos are gapped at .020"which is crazy tight. Gapping plugs tighter can fix this.

 

[Bo0sTeD 4G63]

You maybe getting spark blow out. Usually high boost aplications cause this. Evos are gapped at .020"which is crazy tight. Gapping plugs tighter can fix this.

I have tried gapping my plugs to .20 but still no luck. I am going to buy BPR7ES plugs and see if maybe that fixes the problems.

 

[GST with PSI]

In ignition problem is likely, but it's definitely not blow out.

What fuel are you on, and how much boost? You'll probably want a non-projected tip plug, especially if you're on E85.

 

[Bo0sTeD 4G63]

I bought the spark plugs and gaped them to .28 and the problem still keeps happening. I attached a log with all the updated values for viewing this was a second gear pull.

 

[Bo0sTeD 4G63]

In ignition problem is likely, but it's definitely not blow out.

What fuel are you on, and how much boost? You'll probably want a non-projected tip plug, especially if you're on E85.

I am using E85 and I am at about 12 psi.

 

[GST with PSI]

You should be on a non-projected tip plug gaped tighter than .28. FWIW, when I was having some breakup issues at high RPM, I swapped to an Iridium non-projected 8 range plug gaped at .18.

I'll take a look at your log if/when you update your profile and answer all the questions in my first post.

 

[19gsx91]

You still never mentioned how old are your plug wires were, I had a break up issue in high RPM at WOT and it ended up being tired plug wires.

 

[Bo0sTeD 4G63]

You still never mentioned how old are your plug wires were, I had a break up issue in high RPM at WOT and it ended up being tired plug wires.

My spark plug wires are not even a year old. I ordered some NGK spark plug wires ME77 just incase.

 

[Bo0sTeD 4G63]

If you're going to tell people trying to help you to check your profile for mods, you should probably make sure it's a comprehensive list. Your mod list sucks, and it's too vague for anyone to actually use it to help you. Go update it: http://www.dsmtuners.com/threads/welcome-to-dsmtuners-now-go-create-a-dsm-profile.499707/

For starters, why aren't you logging your WBO2, MAP and IAT? Do you even have a WBO2 or IAT? You're profile says you have an AEM WB, but I don't see it configured in ECMLink. You need to configure ECMlink to log your sensors so you can actually make adjustments to the tune.

Your tune needs some work. If you want help, follow the instructions here and post them up in this thread: http://www.dsmtuners.com/threads/wa...r-receive-no-replies-from-the-wisemen.443297/

See here for what values to capture: http://www.dsmtuners.com/threads/list-of-values-to-log.444831/

How much boost are you running? I bet it's probably enough to need a colder plug. Plugs in the 6 heat range are for cars on near stock boost levels with minimal modifications. Your car probably isn't in this category based on what little information is in your profile.

I updated my profile with all my current mods and I updated a new log on a second gear pull with all the updated values.

 

[GST with PSI]

If you want help, follow the instructions here and post them up in this thread: http://www.dsmtuners.com/threads/wa...r-receive-no-replies-from-the-wisemen.443297/

 

[chrysler kid]

I updated my profile with all my current mods and I updated a new log on a second gear pull with all the updated values.

Good for you. I'm not digging through your profile to find a mods list and a data table and neither is anyone else.

Post your
Fuel pump
Fuel injectors
Engine management
Turbo size
Recent maintenance
And how and when the problem first started

 

[Bo0sTeD 4G63]

Good for you. I'm not digging through your profile to find a mods list and a data table and neither is anyone else.

Post your
Fuel pump
Fuel injectors
Engine management
Turbo size
Recent maintenance
And how and when the problem first started

Twin Walbro 255
FIC 2150cc
ECMLink V3 Speed Density
.70 A/R Turbo
I just finished changing spark plugs to BPR7ES, NGK spark plug wires, I check to make sure I have no boost leaks and I also installed a new tial bov last week because I had an HKS bov and I thought it might be bad since I've had it for a long time. The problem only happens once I pass 5k rpms anything lower than that and the car runs smooth.

 

[AWD-Tony]

Boosted, did you ever figure out your issue?

 

[chrysler kid]

He had a few other threads about the problem back then, I think it was a tuning issue, bad connection on his sd map sensor.