1500 miles on BR7EF plugs, rough idle almost stalled

[Skelly]

Originally Posted by sbelyo

I have a 2013 ZL1 with LT's, 850cc injectors, 2.5" pulley, Flex fuel sensor, tuned and running E60 mostly, running NGK BR7EF plugs gapped to 0.030 I think. It made 622 rwhp on the dyno. For months its run great. About two weeks ago the idle got rougher and it stalled after startup once. Seemed fine for another few days until I took it out last night to bed in some new pads. After decelerating from 80 to 0 it stumbled and almost stalled. It still pulls hard and runs fine driving normal but it just does sound right, like the exhaust note is off.

Is this normal BR7 behavior when the weather gets colder? I'm in FL and it's dropped into the 50's and 60's vs 80's to 100 F.

I believe you meant to say that it does NOT sound right? who did the fuel mix?

Sean

[sbelyo]

Originally Posted by bsn

Since your running a stock fuel pump it would be a good idea to look at your plugs while its down to make sure its not too lean, personally I prefer the TR7ix @ .030 for ethanol.

P.S. there are so many counterfeit parts on Amazon if the sensor doesn't correct your problem-it might be worth trying one from a known parts supplier.

It says shipped and sold by Amazon. Hopefully a real AC Delco part shows up

[sbelyo]

Originally Posted by Skelly

I believe you meant to say that it does NOT sound right? who did the fuel mix?

Sean

Correct! It doesn't sound right. I eyeballed it at the pump. 9 gallons of E85 and 7 of 93.

When it stops raining I'll dig out the HP tuner module and see what the true mix is

[Infidel67]

Originally Posted by Skelly

If your engine was a year or so earlier I would argue the shut off valve is the issue. Ask infidel67 he was the moderator at the beginning of your thread. If there is a fuel error he would know.

Shit! lemme check if I'm a Mod real quick.
the 3 dots only mean I'm subbed to this... Boy o Boy

[Skelly]

Come on now..ask yourselves if this guy had this engine, would he buy a part from Amazon? would he be sharing this here???Something smells and it's not the fuel!! Infidel67 did you create this as a test..


Sean

[Skelly]

Originally Posted by Infidel67

Shit! lemme check if I'm a Mod real quick.
the 3 dots only mean I'm subbed to this... Boy o Boy

Does it sound real to you all kidding aside?

[Infidel67]

I'm just trying to see how can Block or Mute your crazy A$$ lol

[Skelly]

Originally Posted by Infidel67

I'm just trying to see how can Block or Mute your crazy A$$ lol

I will stay away farrrrrrrrrrr away from your Lamo threads and you keep blue away from mine...

Yall started this stuff this morning and I have deleted anything associated with either of you.

[bsn]

Skelly if you don't have anything constructive to add maybe your Yankee a*s needs to find a forum that appreciates trolling. Maybe a BMW forum.

[sbelyo]

Amazon parts can't be that bad lol. I've done it before with no issues. I'm lazy and didn't want to go to the next town over. Gimme 30 minutes and I'll post the ethanol content

[sbelyo]

Ethanol content was 54%. This is in spec with what it was when I left the tuner.

HP Tuners Suite showed the same P0006D-00 code

The Intake pressure read 5.5 psi at idle (650 rpm). Not sure what an acceptable value is at idle. I'll replace the intake pressure sensor tomorrow and see what happens.

[tartagliazl1]

Depending on your pulley combination you should be seeing negative pressure at idle. I have an aggressive pulley setup 2.5/9.55 and idle pressure is -10psi.

[AlisoBob]

Originally Posted by tartagliazl1

..... idle pressure is -10psi.

"Negative Pressure" ?

[AlisoBob]

Originally Posted by sbelyo

The Intake pressure read 5.5 psi at idle (650 rpm). Not sure what an acceptable value is at idle.

It's not reading, as you think it should be.

A engine shut off, with the electronics active should read 1 Bar, or 15 psi. This is not boost, this is atmospheric pressure.