brisvr4
Member
mattrat said:
That is definitely phantom knock, your ecu will be pulling timing like crazy.
Fix that and you will have your power back.
car getting slower
- Thread starter mattrat
- Start date
Help Support 4GTuner:
That is definitely phantom knock, your ecu will be pulling timing like crazy.
Fix that and you will have your power back.
how can i fix something that isnt real, my engine isnt loud at all :? i mean lifter wise..
theres a slight tick but nothing massively loud..
can i unplug the knock sensor from the block and just leave it hanging on the firewall?
see if it drives better then?
and logging it today i definately saw it pull timing, it was at negative 3 on 1 occasion, most times when knock was present it would be around 1 or 2 degrees,
theres a slight tick but nothing massively loud..
can i unplug the knock sensor from the block and just leave it hanging on the firewall?
see if it drives better then?
and logging it today i definately saw it pull timing, it was at negative 3 on 1 occasion, most times when knock was present it would be around 1 or 2 degrees,
iluszn
Well-Known Member
can you borrow a knock sensor.. ?? find a second hand one at a wreckers plug it in and test..
brisvr4
Member
You do have the sensor bolted into the correct spot don't you Matt?
Between 2 & 3 is where it should be.
Between 2 & 3 is where it should be.
brisvr4
Member
Try taking it out and putting it back in. When you put it back just tighten it up enough to hold it in there, not too tight.
CLuTZ
Diamonds are forever....
Have you tried swapping ECU's yet
CLuTZ
Diamonds are forever....
mattrat said:
I thought you had 3? Borrow someone's ECU. They're not hard to find- and that will rule the ECU out once and for all.
You either have knock, or you have phantom knock. You should rule out the fact that you have real knock before you go chasing the phantom stuff, assuming all of your brackets bolts and everything is bolted down nicely and you dont have lifter noise.
What are your 02 voltages like on W.O.T? What fuel are you using? Did you get your injectors cleaned before you installed them?
hey dre, at WOT, 99.6% tps, 5718 rpm, injector duty 81%%, o2 sensor .72 volts, mafs 685.6 hz
another situation, 6281 rpm, 99.6 tps, 82.8% injector duty, o2 reading .83 volts, 717 hz mafs
um here is something interesting i just found..
4125 rpm, 50.7% tps, knock 42, mafs 981.2 hz !!!! at lower rpm and less throttle then the above two scenarios, its pulling in a fuckload of air, note the above two scenarios showed no knock present at those high rpms'
could it be my maf?
another situation, 6281 rpm, 99.6 tps, 82.8% injector duty, o2 reading .83 volts, 717 hz mafs
um here is something interesting i just found..
4125 rpm, 50.7% tps, knock 42, mafs 981.2 hz !!!! at lower rpm and less throttle then the above two scenarios, its pulling in a fuckload of air, note the above two scenarios showed no knock present at those high rpms'
could it be my maf?
CLuTZ
Diamonds are forever....
mattrat said:
There's only one way to find out! Get another and swap it round!
rob323
Don't drive it, RALLY it!
The phantom knock problems on BennyGee's old vr4 were solved when we replaced the front and rear roll stoppers with new ones. How good are your mounts?
With regards to the reduced airflow at high rpm, if swapping the AFM doesn't help, then maybe check to make sure the intake pipe isn't being sucked closed (assuming you are using a rubber one, not a metal one) and that you don't have any air leaks in the system which only suck air in at high rpm. Have you pressure tested the intake?
With regards to the reduced airflow at high rpm, if swapping the AFM doesn't help, then maybe check to make sure the intake pipe isn't being sucked closed (assuming you are using a rubber one, not a metal one) and that you don't have any air leaks in the system which only suck air in at high rpm. Have you pressure tested the intake?
