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Knock With Pfc

bish33

By bish33,
in Engines & Forced Induction

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Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted
Ive had these constant knock issues ever since I got a PFC back in 06, NEVER knocks on the dyno, take it on street knocks all the time around 6k, take it back to tuner they throw it on dyno say nothings wrong, take them for a drive and show them, they blame it on my pod sucking too much hot air. So I then put a stock airbox on with a cold air feed, still friggin knocks.

Went to a new tuner and got a new tune, again same problem, no knock on dyno knocking on street, he made some adjsutments, still knocks.

Went to a 3rd tuner, STILL SAME PROBLEM. Ive never had a knock free car for almost 3 years now and it shits me like crazy.

Im thinking of takin my bigger tturbo / injectors etc off and just going back to a stock ecu its annoying me that much.

If anyone on here from Sydney can GUARENTEE they can make my car knock free with a road tune, PM me and ill give you some business.

What if your car is not knocking ? I keep saying this but i will say it again..

STANDARD POWER FC KNOCK SENSORS ARE SHIT & DO NOT WORK PROPERLY

sent u a PM

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Bennett Mentor

Bennett

Posted
Posted
STANDARD POWER FC KNOCK SENSORS ARE SHIT & DO NOT WORK PROPERLY

+1 They pick up heaps of noises. Small missfires, general engine noise, vibrations etc etc. My knock jumps round on idle!! So hard to tune it right when you dont know whats knock and whats not.

Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted
+1 They pick up heaps of noises. Small missfires, general engine noise, vibrations etc etc. My knock jumps round on idle!! So hard to tune it right when you dont know whats knock and whats not.

Exactly. I purchased the Gizzmo K-Mon to actually find out whats going on with my engine because it was knocking no matter what i was doing and I did not want to break my engine. After using this I have learnt shitloads about knock and the power fc knocking situation, at $1,200 retail its a big price to pay but my engine is not exactly standard so its good insurance.

One thing i noticed is that I can run more then 8deg timing on full load with NO knock, even though the PFC was showing anywhere from 70 - 150 knock. So yeah I have much more power that can be extracted from the engine.

PM me if you want to have this baby put on your car and given out a knock reading on the street or on a dyno...

Something like this

post-1240-1227674688_thumb.jpg

Have a look, the reading is not going over 35ish... with my PFC knock sensors on that tune it was showing 100+

Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted
Guilt-toy, let me know if you're ever in Melbourne :)

If you find 3 or 4 guys that need this done then organise something I will come down for a cruise.

Otherwise, contact trent (URAS on the forums) @ Status Tuning... He has the Gizzmo K-MON as well so he should be able to do the same as i would and I hear he is very reasonable on his prices.

barnoon Experienced

barnoon

Posted
Posted

Just thought id post another question, ive noticed when my engine is fairly cold eg first start of the morning, if i let it get to around 60 deg or so and thrash the guts out of it (yes i know i shouldnt do this on a cold engine) it will NEVER knock no matter what, but once the water temps get up around normal 75 or so, all the knocking starts again.

Same thing with a very cold night about 6 or 7 degrees it will hardly knock at all, but on a 30 degree day, will knock every time without fail when i give it some welly.

Does this still point towards false knock readings? can heat in the engine effect how the PFC knock sensors work?

Ive done as much as I can to ensure my car has sufficent airflow (Cai to stock airbox with high flow panel filter, and also tried a big pod) but the knock light will still go off.

Im def going to get guilt-toy to look at my car once I get some spare cash up.

Pattygtst Veteran

Pattygtst

Posted
Posted

Having knock issues myself.

When car was first tuned with pfc. No probs never went over 12 no matter what i did.

Month or so later put in a decat pipe and had a slight retune. Shortly after days or a week i cant remember i noticed the thing was over a 100. Tested it on full boost and the thing was going up quick. Chucked in some octane booster and no issues.

Had car serviced and got them to take out some timing to richen it up, getting inconsistant unsual knock.

The tuners are good so i am assuming its picking up other things in engine. Hoping anway. sux cause i dont want to give it any turps.

Bennett Mentor

Bennett

Posted
Posted
Just thought id post another question, ive noticed when my engine is fairly cold eg first start of the morning, if i let it get to around 60 deg or so and thrash the guts out of it (yes i know i shouldnt do this on a cold engine) it will NEVER knock no matter what, but once the water temps get up around normal 75 or so, all the knocking starts again.

Same thing with a very cold night about 6 or 7 degrees it will hardly knock at all, but on a 30 degree day, will knock every time without fail when i give it some welly.

Does this still point towards false knock readings? can heat in the engine effect how the PFC knock sensors work?

Ive done as much as I can to ensure my car has sufficent airflow (Cai to stock airbox with high flow panel filter, and also tried a big pod) but the knock light will still go off.

Im def going to get guilt-toy to look at my car once I get some spare cash up.

Thats normal mate. Hotter air temps always result in higher knock levels. Tune your car on a hot day and you will be sweet :blink:

Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted
did you find out how to tune your kmon without inducing knock?

does that mean that setup can be transferred to another kmon to avoid that process?

you dont need to tune it. it picks up knock without fine tuning it from the standard settings normally. You just need to know what you are looking for and hearing for.

Keen for a trip to melb Paul??

Swiper the Fox Grand Master

Swiper the Fox

Posted
Posted
you dont need to tune it. it picks up knock without fine tuning it from the standard settings normally. You just need to know what you are looking for and hearing for.

Keen for a trip to melb Paul??

Im going if you are!

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