Persistent Idle Misfire

[GregO]

Mechanic says mechanically perfect. Tuner says tune is perfect. Car says misfire bog pop and hesitate.

Looking at it from a forum board discussion and not hands on what other non factory aftermarket electrical components have been installed on your car ?
Different Alternator
Stereo sound system
Radar detector
Etc…..

Electrical Inductance could be the root cause of the symptoms described.

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[Daryl333]

So are you just seeing misfires in the logs or are you actually FEELING something? I see random misfires in my logs too. Nothing I ever feel and I know my car is straight DIALED. You are saying you have this problem, but what exactly is the problem? Again is it shaking or stumbling at idle?? Or just seeing the logs. You said no codes too right?

Also what are your fuel trims at idle? I'd be turning off the long terms at this point. One thing I have seen and saw in my car was that my maf was a tad off at low idle and also at a certain RPM, the maf period was bouncing between two cells in the tune. And if you dont have those two cells PERFECTLY dialed, the car will have a bit of a wave in the logs to the idle. Like its going up and down consistently. You almost need to rescale the maf or really finely tune it with the short term trims. This is something that most tuners wont get too deep into.

I can reach out and give you a number of someone that can and is willing to help.

I've used Forscan to monitor idle misfires. As well I can feel it in the Steering Wheel and see and hear it in the the exhaust. Especially now in the cold weather I get Steam rings.
As stated earlier I have been told the logs are good by multiple people not just the tuners.
I have no more relationship with the tuners so no access to the tune. No codes.

 

[SheepDog]

I've used Forscan to monitor idle misfires. As well I can feel it in the Steering Wheel and see and hear it in the the exhaust. Especially now in the cold weather I get Steam rings.
As stated earlier I have been gold the logs are good by multiple people not just the tuners.
I have no more relationship with the tuners so no access to the tune. No codes.

Are you certain that you don't have a vacuum leak? I find it unlikely that you would have misfires on all 8 cylinders, due to spark plugs or injectors.

What fuel system are you running? or just a BAP?

 

[Pistol_91]

lol.

Actually a forum member here converted a log and I posted on the HP forum as well…. No real answers there either unfortunately. When you say real tune, who exactly are you thinking as far as “real tune”?

Bought into the hype? I don’t follow. So far, I’ve talked with people who have this same issue with Wengerd, VMP and Lund.

I have no problem getting out the wallet! I’d love to be able to just pay the money and get it salted away. Unfortunately, tuner fan boys rave about this or that while the guys with issues get beaten down or dismissed by such. I would absolutely love to tune the car myself. But I don’t have the knowledge or skill set to do so. So like 99.9 % of the people here that can’t tune themselves I have to follow along and take things with a grain of salt. Who is the god of tunes? Depends on what thread you go to. Who has the least amount of issues? Depends on what thread you go to. I wish it was as easy as you say, get a real tune… if you’re implying Lund is the issue, I would fathom a guess that their percentage of satisfied customers would be right in line with all the others. The difference is who will actually take the time to work through issues when they come up. Lund won’t. VMP won’t. Wengerd dismisses you, PBD has had some criticism as well. So if you know something I don’t and can guarantee that a certain person or company will absolutely work with a customer to 100% guarantee complete satisfaction and work through this type of issue to resolve it, I’ll gladly take my wallet that way.

But right now, I haven’t the confidence to do that. Hence, asking the questions to look for answers from guys who may have gone through this already and determined the root cause.

I don’t even know if this is some mechanical issue of some sort or an actual tune problem. That’s my dilemma. Mechanic says mechanically perfect. Tuner says tune is perfect. Car says misfire bog pop and hesitate.

I try to help people and answer simple questions on hpt forums. Not sure what you asked or posted but if you don't post at the least, a log and a tune. Nobody is going to help you unless it's an obvious problem. Most of the actual tuners on there aren't going to do anything for free. Also, nobody is going to help you either, if you're running someone else's tune that is locked and can't be viewed. It's a waste of time and it's also a guessing game at that point. A log is ok but it is only half the equation. You're better off finding someone on here with a similar set up that has no issues and go with which ever tuner they went with. Rescaling the MAF would prob help a ton at idle like zx mentioned, but can't do that through a log or locked tune. Maybe if you bug Lund enough they'll have someone help you that actually tunes cars instead of answers emails. Good luck

 

[Daryl333]

Are you certain that you don't have a vacuum leak? I find it unlikely that you would have misfires on all 8 cylinders, due to spark plugs or injectors.

What fuel system are you running? or just a BAP?

I don't believe it is to do with plugs or coils, I changed them for brand new long ago
(plugs 3x). That is why my post is asking if anyone has found an abnormal fix for misfires. We have smoke tested this car 3 times as well as used brake cleaner and Propane. As well as gone over all connections and harnesses.
I changed out the BAP for a return style system as per tuners advice... No change in anomalies.

 

[Torinate]

Looking at it from a forum board discussion and not hands on what other non factory aftermarket electrical components have been installed on your car ?
Different Alternator
Stereo sound system
Radar detector
Etc…..

Electrical Inductance could be the root cause of the symptoms described.

lol. No offense, but if that were the case, everyone on the board here would have multiple issues just having a cell phone.

To answer, nothing has changed electrically. Not even a radar detector. Illegal here….

 

[Torinate]

I try to help people and answer simple questions on hpt forums. Not sure what you asked or posted but if you don't post at the least, a log and a tune. Nobody is going to help you unless it's an obvious problem. Most of the actual tuners on there aren't going to do anything for free. Also, nobody is going to help you either, if you're running someone else's tune that is locked and can't be viewed. It's a waste of time and it's also a guessing game at that point. A log is ok but it is only half the equation. You're better off finding someone on here with a similar set up that has no issues and go with which ever tuner they went with. Rescaling the MAF would prob help a ton at idle like zx mentioned, but can't do that through a log or locked tune. Maybe if you bug Lund enough they'll have someone help you that actually tunes cars instead of answers emails. Good luck

Love this! No one will help unless it’s obvious. Well, if it was obvious I wouldn’t be asking.

Really? Most of the tuners on the forum there want to get paid? Capitalism at its finest! It’s an internet board… not a business. Just my opinion though…

You’re right, Lund screens all their incoming emails - even if sent directly to the tuner who did your tune.

I’ve sent logs to some of the smartest people on this board and have posted a few as well. Nothing obvious or stands out.

I am more than a little surprised people post their tunes. I guess if they’re just learning to tune maybe post up something. Of course, the “pros” would want to be paid for offering any sort of advice or direction though, so what’s the gain then?

I assume from your response and trying to help people out, you’re a professional tuner. Are you an individual or work for a company? Remote or strictly in house? Where are you located (roughly).

Thanks.

 

[Pistol_91]

Love this! No one will help unless it’s obvious. Well, if it was obvious I wouldn’t be asking.

Really? Most of the tuners on the forum there want to get paid? Capitalism at its finest! It’s an internet board… not a business. Just my opinion though…

You’re right, Lund screens all their incoming emails - even if sent directly to the tuner who did your tune.

I’ve sent logs to some of the smartest people on this board and have posted a few as well. Nothing obvious or stands out.

I am more than a little surprised people post their tunes. I guess if they’re just learning to tune maybe post up something. Of course, the “pros” would want to be paid for offering any sort of advice or direction though, so what’s the gain then?

I assume from your response and trying to help people out, you’re a professional tuner. Are you an individual or work for a company? Remote or strictly in house? Where are you located (roughly).

Thanks.

It's hard to diagnose an issue when the only thing you're looking at is someone's log when there's more than 1 thing that can be causing certain issues on these cars. There's a few different things that can effect idle. I agree it is a forum and not a business but alot of people basically create an account, post a new thread, title it "here's my tune fix it please" and that's it. What do you expect. People will help if you're having issues with your own tune and actually put effort in, to learn and put the work in. Nobody is going to fix your Lund tune for you on a forum. Sorry. I think you're not understanding that basic concept. I help some people with the knowledge I know of. That's all. Never claim to be a "professional". There's a bunch of people on that forum that could help you but they can't do anything when you have a locked tune on your car. Basically pissin in the wind.

 

[ZXMustang]

I try to help people and answer simple questions on hpt forums. Not sure what you asked or posted but if you don't post at the least, a log and a tune. Nobody is going to help you unless it's an obvious problem. Most of the actual tuners on there aren't going to do anything for free. Also, nobody is going to help you either, if you're running someone else's tune that is locked and can't be viewed. It's a waste of time and it's also a guessing game at that point. A log is ok but it is only half the equation. You're better off finding someone on here with a similar set up that has no issues and go with which ever tuner they went with. Rescaling the MAF would prob help a ton at idle like zx mentioned, but can't do that through a log or locked tune. Maybe if you bug Lund enough they'll have someone help you that actually tunes cars instead of answers emails. Good luck

They wont. They will just "fire you" as a customer and you are shit out of luck. What a great company... Keep pushing their name out sheeple. (not you Pistol)

 

[Pistol_91]

They wont. They will just "fire you" as a customer and you are shit out of luck. What a great company... Keep pushing their name out sheeple. (not you Pistol)

Jeez you really hate them lmao. No worries. I don't use Lund so I know better...

 

[Torinate]

I don’t have issues with Lund. I have had their tunes since 2016. NA and then supercharged. They perform as they should. As I’ve said before, if you add up the complaints they have versus all of the others, I would bet they have as high or higher customer satisfaction as the others do. Same ballpark anyways. Not a fanboy, it’s just sheer numbers. The likely have the most tunes out there.

Live I’ve said, I don’t know if my issue is mechanical or tune related. I’ve had these issues for 3+ years though. It’s the bog when I stab the pedal that happens 35-40% of the time that bother me the most. Of course the odd gunshot backfire here and there is also a concern.

 

[HKusp]

Two things that I would do. I would try the Whipple 132 instead of the 150. More than a few people have had issues with the 150. The 132 will support more than the car is capable of on 93 octane and north of 100whp on ethanol. I would also throw another fuel pump at it and get rid of the voltage booster that I believe you are probably running.

 

[SheepDog]

I don't believe it is to do with plugs or coils, I changed them for brand new long ago
(plugs 3x). That is why my post is asking if anyone has found an abnormal fix for misfires. We have smoke tested this car 3 times as well as used brake cleaner and Propane. As well as gone over all connections and harnesses.
I changed out the BAP for a return style system as per tuners advice... No change in anomalies.

Did this problem start as soon as you installed the Whipple, or have you had the Whipple on and running correctly, and only recently started having these issues?

I highly doubt this has anything to do with the tune. Sure, people have had less than stellar experiences with Lund lately, but for both the Lund and Wengerd tunes to be "the Issue"? I think not. Your setup is not a Unicorn. Both Tuners have done dozens or even hundreds just like it.

 

[Daryl333]

I try to help people and answer simple questions on hpt forums. Not sure what you asked or posted but if you don't post at the least, a log and a tune. Nobody is going to help you unless it's an obvious problem. Most of the actual tuners on there aren't going to do anything for free. Also, nobody is going to help you either, if you're running someone else's tune that is locked and can't be viewed. It's a waste of time and it's also a guessing game at that point. A log is ok but it is only half the equation. You're better off finding someone on here with a similar set up that has no issues and go with which ever tuner they went with. Rescaling the MAF would prob help a ton at idle like zx mentioned, but can't do that through a log or locked tune. Maybe if you bug Lund enough they'll have someone help you that actually tunes cars instead of answers emails. Good luck

Did this problem start as soon as you installed the Whipple, or have you had the Whipple on and running correctly, and only recently started having these issues?

I highly doubt this has anything to do with the tune. Sure, people have had less than stellar experiences with Lund lately, but for both the Lund and Wengerd tunes to be "the Issue"? I think not. Your setup is not a Unicorn. Both Tuners have done dozens or even hundreds just like it.

Not once have I said this is a tune issue. I don't know why every body keeps saying that.
I guess people are used to guys blaming the tuner, I'm not.
Lol
My original post is asking people if they've had misfires that were fixed by other fixes. Like evap or other ways, cause I and the guys at the shop I use can't figure it out. Matter of fact the shop is saying live with it.
But a car that does this is unreliable to me.

 

[Daryl333]

Two things that I would do. I would try the Whipple 132 instead of the 150. More than a few people have had issues with the 150. The 132 will support more than the car is capable of on 93 octane and north of 100whp on ethanol. I would also throw another fuel pump at it and get rid of the voltage booster that I believe you are probably running.

I don't know who you're talking to. I am running a Whipple 132MM TB.
And I have a return style fuel system.

It's hard to diagnose an issue when the only thing you're looking at is someone's log when there's more than 1 thing that can be causing certain issues on these cars. There's a few different things that can effect idle. I agree it is a forum and not a business but alot of people basically create an account, post a new thread, title it "here's my tune fix it please" and that's it. What do you expect. People will help if you're having issues with your own tune and actually put effort in, to learn and put the work in. Nobody is going to fix your Lund tune for you on a forum. Sorry. I think you're not understanding that basic concept. I help some people with the knowledge I know of. That's all. Never claim to be a "professional". There's a bunch of people on that forum that could help you but they can't do anything when you have a locked tune on your car. Basically pissin in the wind.

Can you guys take this conversation elsewhere??
You seem to be talking about tuning and this is getting sidetracked. My original post was pertaining more to a mechanical problem as I've stated my tune seems to be on point.

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