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Car Stutter On Boost/wot

AlexCim

By AlexCim,
in Engines & Forced Induction

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AlexCim Grand Master

AlexCim

Posted
Posted

On saturday morning i changed my sparkies. Ive done it before its a pretty standard proceedure. Had BCPR7ES's before, put in 4 BCPR7ES's and two BCPR7ES-11 regapped at 0.8mm. So, they were all at 0.8mm.

Car felt a lot better on power, went out that night, lots of revving etc, car was great. At the same time i also cleaned the coilpacks with some contact cleaner.

So sunday night the car started to develop a stutter. It is not R&R. It is not a misfire, rather it is as the car is being shuffled (like a DJ does a record) while still accelerating.

The reason that i even mentioned the spark plugs is that this is the only thing thats changed in the last few days.

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danielson Proficient

danielson

Posted
Posted
On saturday morning i changed my sparkies. Ive done it before its a pretty standard proceedure. Had BCPR7ES's before, put in 4 BCPR7ES's and two BCPR7ES-11 regapped at 0.8mm. So, they were all at 0.8mm.

Car felt a lot better on power, went out that night, lots of revving etc, car was great. At the same time i also cleaned the coilpacks with some contact cleaner.

So sunday night the car started to develop a stutter. It is not R&R. It is not a misfire, rather it is as the car is being shuffled (like a DJ does a record) while still accelerating.

The reason that i even mentioned the spark plugs is that this is the only thing thats changed in the last few days.

coil packs or wet/dirty afm

GorGasm Collaborator

GorGasm

Posted
Posted

I did the same thing as that once. I changed the plugs, put contact cleaner on the coils and the car did the same as yours until i bought new coils. I think it may have been the contact cleaner shrinking the rubber boots or something.

Check the coils :huh:

BezerkR32 Veteran

BezerkR32

Posted
Posted

Pretty much answers your question then.

try iridium BKR6EIX, B7 sounds like to hot a plug unless you run 20psi.

On saturday morning i changed my sparkies. Ive done it before its a pretty standard proceedure. Had BCPR7ES's before, put in 4 BCPR7ES's and two BCPR7ES-11 regapped at 0.8mm. So, they were all at 0.8mm.

Car felt a lot better on power, went out that night, lots of revving etc, car was great. At the same time i also cleaned the coilpacks with some contact cleaner.

So sunday night the car started to develop a stutter. It is not R&R. It is not a misfire, rather it is as the car is being shuffled (like a DJ does a record) while still accelerating.

The reason that i even mentioned the spark plugs is that this is the only thing thats changed in the last few days.

AlexCim Grand Master

AlexCim

Posted
  • Author
Posted

BCPR7ES's are what SK reccomeded.

I run a street tune of 11psi on an untuned engine thou.

I just realized a few more symptoms the other night. For some reason i had massive boost spiking, so I am going to cut the EBC out of the equation and go to actuator spring pressure for a while (which is what the EBC is set to anyway).

Sydneykid Grand Master

Sydneykid

Posted
Posted
BCPR7ES's are what SK reccomeded.

I run a street tune of 11psi on an untuned engine thou.

I just realized a few more symptoms the other night. For some reason i had massive boost spiking, so I am going to cut the EBC out of the equation and go to actuator spring pressure for a while (which is what the EBC is set to anyway).

Hi Alex, is that with the high flow turbo on? If so, this is what I would do;

1. Check the installation, make sure no loose wires or untightend bolts

2. Get the boost under control

3. Maybe reduce the gap down to 6.5 mm, if you find nothing else wrong

4. Regarding the plug heat range, I use 7's on tuned engines running more than 1 bar. Which would be the case if you had the high flow up to 1.3 bar and had it tuned. Until you up the boost and get it tuned, it may be better off with 6's.

:( cheers :D

Bass Junky Grand Master

Bass Junky

Posted
Posted

When I was in the car, it felt like a slipping senstation.

Like if it was a manual, somebody was slipping the clutch a little, several times a second.

It's quite strange and not like anything I've felt before.

It's not a popping from the plugs, but that doesn't rule them out.

Its also definently R&R unless the Stag engine does that 3-4 times a second....

BASS OUT

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