Flashing check engine under high rpms

[auditrackspeed]

The other day raced a 2003 z06 on the freeway . My car is stage 3 . I beat him on the first pull in 2nd and 3rd , now my car has a flashing check engine only under high loads .

[Smokin Joe]

Scan it, most of the time a flashing CEL is for a misfire. Find out which cylinder is acting up and then you can sort it out. How healthy is your ignition system? High boost can blow out the spark plugs. A weak coil or worn plugs can run fine under light loads but fail when pushed.

[auditrackspeed]

Scan it, most of the time a flashing CEL is for a misfire. Find out which cylinder is acting up and then you can sort it out. How healthy is your ignition system? High boost can blow out the spark plugs. A weak coil or worn plugs can run fine under light loads but fail when pushed.

Only code i have is for a p0300 , but i had that since i had the car and it was acting fine untill just yesterday . only that one code .

[MacDaddy]

From what I understand a flashing CEL means the problem is happening right now, scan for codes and whatever comes up its at high revs when the light was flashing, probably a misfire.

If you have a threaded cap on the top of your plugs make sure it's tight, then the usual, change gap, make sure coils aren't old and weak, etc.

[Smokin Joe]

A P0300 is for a random misfire. Start simple and check your plugs to make sure they aren't cracked or have carbon runners on the porcelain. If you have VagCom run the car with the measuring blocks set to show misfires and see which one is acting up. A helper will make this part a lot safer.

[Quattro_The_Dog]

A bad injector, coil or coil wiring will usually misfire all the time randomly. If it only does it under high load it is probably a plug issue.

[MarlinFoundNemo]

I was dealing with this just last night. I run a stage 2 tune and until previously (last night) there hasnt been too many misfire issues. However did a couple pulls the other night and then it got to the point where stepping on the gas would just *pop pop pop pop pop* with misfires. Didnt push it after that. Then last night went to the bank and noticed a little misfire while idling and it got worse when I got to the bank. So I popped the hood and plugged my stock ECU back in, and then it was misfiring so I bad I was praying to Jesus that I'd make it home But now.. I went to start it this morning and took it for a drive and ZERO misfires. So wtf germany.

[DieselElectric]

A flashing CEL always indicates a condition that can/will damage catalytic converters. I.e. raw fuel being dumped into them due to a bad misfire.

Change your plugs. I go through a set of bkr7e (or whatever the new number is) in less than 10k. I also gap them to .019, any bigger and it will blow out (on my car, at least).

[DieselElectric]

A bad injector, coil or coil wiring will usually misfire all the time randomly. If it only does it under high load it is probably a plug issue.

A weak coil can also perform fine under low load when the charge is easier to ignite. But I agree, plugs first, especially with a p0300. If it were a coil or injector issue it would be a p0301-306 code, not random.

[Wagonholic]

A flashing CEL always indicates a condition that can/will damage catalytic converters. I.e. raw fuel being dumped into them due to a bad misfire.

Don't run cats. Problem solved
(But yes, important to stop driving asap whenever you have a flashing CEL)

Change your plugs. I go through a set of bkr7e (or whatever the new number is) in less than 10k. I also gap them to .019, any bigger and it will blow out (on my car, at least).

Interesting...stock coil packs? That seems quite small of a gap. I'm running bkr7e at .028 on K04s, pump gas, meth, and stock coil packs with no issues.
I guess every car is different lol

[DieselElectric]

Don't run cats. Problem solved
(But yes, important to stop driving asap whenever you have a flashing CEL)


Interesting...stock coil packs? That seems quite small of a gap. I'm running bkr7e at .028 on K04s, pump gas, meth, and stock coil packs with no issues.
I guess every car is different lol

I don't have cats, just what the flash is there for. Since no one pays attention to a CEL anymore, a flashing one means business lol.

And yup, stock coil packs. I didn't have any issues until I went past 20psi. Now with 25psi I found they gotta be tight. I swapped in new ones and gapped at .025, and had misfires. Got another set and had the same issue, a friend suggested going tighter, and voilà.

[auditrackspeed]

When the flashing check engine light comes on when i push the car it goes out and there is no check engine . So only when i push the car it acts up.

[christianb5s4]

Don't run cats. Problem solved
(But yes, important to stop driving asap whenever you have a flashing CEL)

Interesting...stock coil packs? That seems quite small of a gap. I'm running bkr7e at .028 on K04s, pump gas, meth, and stock coil packs with no issues.
I guess every car is different lol

This. I tried a number of difference gaps for my BKR7Es, my car likes 0.024 but I think I will gap down next time to see how that does (0.022). Who needs stinkin' cats anyway.

I don't have cats, just what the flash is there for. Since no one pays attention to a CEL anymore, a flashing one means business lol.

Ha, especially since half the videos you see of B5 S4s have the instrument cluster lit up like a Christmas tree.

[MikeyB3]

Who still runs cats on these cars?

[axnjaksn]

The other day raced a 2003 z06 on the freeway . My car is stage 3 . I beat him on the first pull in 2nd and 3rd , now my car has a flashing check engine only under high loads .

keep it simple, flashing cel means misfire, don't go chasing your tail, anything related, spark plugs(gaps), ignition coils, usual causes. p0300 is misfire(general misfire) the flashing cel is your engine control unit way of telling you your misfiring and damaging your cat(whether you have one or not) that's the way the obd2 coding is written. if its happening under high boost or load, plugs, gaps and coils, check those first

[auditrackspeed]

Since i have k04's what spark plugs should i buy if needed

[zillarob]

Oh now you done gone and did it
Prepare for a barrage of crazy numbers coming your way!! Spark plug threads are almost as good as oil threads

Ill start
ngk pfr6q- expensive as hell, but will prob give you the most miles.
ngk bkr6e- cheap enough to change with the oil, and might need to.

I listed only stock heat range plugs because that is prob all you need.
Too many people make the mistake of buying plugs that suit their max power, and not what suits the way they drive 98% of the time.
If it were going to be making hammer down laps at the track, I would think about jumping up in the heat range.

[auditrackspeed]

Oh now you done gone and did it
Prepare for a barrage of crazy numbers coming your way!! Spark plug threads are almost as good as oil threads

Ill start
ngk pfr6q- expensive as hell, but will prob give you the most miles.
ngk bkr6e- cheap enough to change with the oil, and might need to.

I listed only stock heat range plugs because that is prob all you need.
Too many people make the mistake of buying plugs that suit their max power, and not what suits the way they drive 98% of the time.
If it were going to be making hammer down laps at the track, I would think about jumping up in the heat range.

Thanks man

[auditrackspeed]

keep it simple, flashing cel means misfire, don't go chasing your tail, anything related, spark plugs(gaps), ignition coils, usual causes. p0300 is misfire(general misfire) the flashing cel is your engine control unit way of telling you your misfiring and damaging your cat(whether you have one or not) that's the way the obd2 coding is written. if its happening under high boost or load, plugs, gaps and coils, check those first

Does anti lag shorten your spark plugs life spand ?

[DieselElectric]

Oh now you done gone and did it
Prepare for a barrage of crazy numbers coming your way!! Spark plug threads are almost as good as oil threads

Ill start
ngk pfr6q- expensive as hell, but will prob give you the most miles.
ngk bkr6e- cheap enough to change with the oil, and might need to.

I listed only stock heat range plugs because that is prob all you need.
Too many people make the mistake of buying plugs that suit their max power, and not what suits the way they drive 98% of the time.
If it were going to be making hammer down laps at the track, I would think about jumping up in the heat range.

Common man, people run plugs for their max power because that's when the damage happens from detonation.

Cooler plug = better resistance to detonation. If your car was tuned on a colder range plug, I would definitely log if switching to stock.

That said, you will never notice a difference in normal driving with a bkr7e (one step cooler plug), other than fouling plugs more often.

To the OP, yes, antilag will contribute to fouling plugs. Methanol eats up plugs as well. Aaand, rich AFRs (which Turbo cars need).

[V1nny]

Someone told me that Brisk DR14y would magically cure any misfires:
http://www.raimotorsport.com/Brisk-R.../brisk%201.htm
anyone tried them?

I am in a roughly same boat with my stage 3 allroad.

[S4gasm2.7t]

I've always run BKR7E gapped to 026-028 haven't really tried less. 1. Over platinum and iridium plugs copper cools more in between each spark plug fire keeping egt's down. 2. I would say do not get stock plugs cause when you do wanna get on it they'll get way too hot. 3. At $12 for a set I'm not complaining, these aren't hard cars to change plugs on...

Also interested if anyone's used those brisk DR14y's. Just curious it any good...

Sent from my SCH-I545 using Tapatalk

[auditrackspeed]

How much does anti lag shorten spark plug life ?

[zillarob]

Common man, people run plugs for their max power because that's when the damage happens from detonation.

Cooler plug = better resistance to detonation. If your car was tuned on a colder range plug, I would definitely log if switching to stock.

That said, you will never notice a difference in normal driving with a bkr7e (one step cooler plug), other than fouling plugs more often.

No, most people run colder plugs for one reason, and one reason only- Because Racecar.
The same reason giant slow spooling turbos and terrible driving clutches are so popular around here.
Gotta have racecar plugs, big peaky hp numbers, and a clutch that is good for the 600ftlb of torque it will never see because of the stock rods.

I babysit a few cars. One stg3 didnt even change the stock pfr6q when the turbos went on.
It was still running fine 2yrs later when he finally decided it was time to put a new set in.
And he def drives the shit out of it