Blown knock sensor?

[ToyoSolV6]

Ok so for the past month or so ive been running my car at 4.5psi with 330cc fuel injectors.
Today Frank and I went to Greg's house and he installed Dats y pipe, 3in OBX exhaust, Jims Fuel mod, 190 walbro fuel pump, an safc and i went to 5.5psi

ok the problem started before we got to Gregs, i was getting on to the freeway and i decide to step on it. After reaching 4k it feels as if the car decides to pull me back and not let me go any farther. Sort of feels like im red lining, and the power doesnt stay constant till 4k it feels as if i lost a lot instead of gaining it.

I spoke with Frank and Greg and they said its most likely the knock sensor and the car is in limp mode or retard mode lol.

Let me know what you guys think.

[ToyoSolV6]

^holy crap i just noticed i posted in the wrong section. Mods can you please move it to the correct place

haha newbie moment.

[Midias]

Sounds like when I blew my knock sensor. Did you get a code or check it with an obd2 reader?

[ToyoSolV6]

ok so you do think it's the knock sensor? becuase i dont want to have to deal with something being wrong with the internals of the engine.

Well i do have cel, but ive always had it since i bought the car and thats because one of my o2 sensors is fried, but tomorrow morning im going to get it checked out with the code reader and find out what codes it giving me

[Midias]

I would say yes knock sensor. Do you have a piggyback that lets you watch your timing?

[ToyoSolV6]

sorry bud, noob question whats a piggyback, im new to the boost club lol

[Midias]

sorry bud, noob question whats a piggyback, im new to the boost club lol

Apexi AFC2 or a NEO?

[ToyoSolV6]

ahh, yes i do. Gabe gave us the numbers to set it at 7psi. Would having or not having the AFC have anything to do with this?

[jetbtkng]

no fergie, has nothing to do with your problem, its either a knock sensor, or a short, like i told you, dam kids, not having it , and running 91 octane, broken motor mounts and the engine flopping around could all be the source of the problem...............

[99BlackSandv6]

I think it sounds like a possible knock sensor blown, I know that the engine is affected drastically by knock starting at about 4krpm. If you have a CEL the codes will answer your question. Just do everything the experts on here tell you you should do and you'll be fine.

[GzNutz]

Today Frank and I went to Greg's house and he installed Dats y pipe, 3in OBX exhaust, Jims Fuel mod, 190 walbro fuel pump, an safc and i went to 5.5psi

That's a nice list of mods for a one day install. Except for the possible blown knock sensor, it seems you didn't have too bad of a day.

[Midias]

I don't know the safc well does it actually show your timing?

[Dawgz]

I don't know the safc well does it actually show your timing?

SAFCII does not show timing, however it does have a knock sensor wire, and if it is hooked up to the correct (blown) knock sensor, you will see that the knk is not acting normal. Under normal operation, the knk will be lower numbers at idle/low throttle and then max 2-400 at full throttle, however when blown, the knk variance stays 10-20~ at low or high throttle. So when the ecu goes into open or closed loop and sees that the KNK is giving out the same numbers at low or high, it will start to pull timing.

I have pulled all this data from personal experience on the road, and having a KNK go out on the dyno.

[Dawgz]

BTW, for the time being before you replace your KNK, here is a band-aid fix to get your power back.

http://www.solaraguy.com/viewtopic.php?t=33853

If you need further help on this DIY, you can PM me.


But since you live so close to greg, im sure you will have that blown KNK out in 20 minutes and replaced...haha.

GL!

[Dawgz]

I think it sounds like a possible knock sensor blown, I know that the engine is affected drastically by knock starting at about 4krpm. If you have a CEL the codes will answer your question. Just do everything the experts on here tell you you should do and you'll be fine.

ecu starts to accept reading from KNK at about 3k rpm. You can test this if you have a CEL for a blown KNK, reset the ecu, drive, and as soon as you start to get to 3k, it will start to pull timing.


BTW the cheap way of reading timing is with the ELM obdII reader. U can get that on ebay for like 30 bux.