S-afc and Knock, Why is my knock rating high? Options

[HyperDeathKill]

So I'm kind of concerned that my engine is knocking. I just installed an s-afc and I've been monitoring knock, and have gotten numbers as high as 100 on it. It's not a consistant knock, and I can't hear anything, but it sometimes happens when I take my foot off the throttle and when the car shifts.

All I have is an Intake, Exhaust, and Underdrive pulley. I'm not leaning out the engine and I still get the knock numbers when I increase the air/fuel mixture by 10% throughout the band. I've calibrated the thing 3 times, anybody know what is up?

[edo17982]

finally someone raply!!!
Here in Italy now have 35 degrees and 50% humidity and during day my knock sensor reaches 140 at idle after 2 hours in traffic but I have nothing hearable...During evening, when temp is much lower I have a max of 90-100 at idle......let me know your values at idle and at WOT and also the condition u're running (air temp, time running etc...)
For sure my knock should be higher than your due to type of mods, anyway I'm interested to share opinions

This post has been edited by edo17982: Jun 24, 2003 - 10:11 AM

[SiKBOY]

Um, I kind of know that this is off topic, but I was wondering if you guys know if all 5SFE ECU's have all the same pinouts. Whether it be in an MR2 or a Celica in US or in Australia.

I just bought an SAFCII and there isnt a wiring diagram for the ST204 it in the instructions.
There is an how to on one of the other celicawebsites somewhere but I just want to know if all 5SFE ECU's have the same pinouts...

I really dont want to blow up my new SAFC of even worse... blow my ECU or something.

thanks

Hyperdeath, which diagram did you follow and do you have the SAFCII or the 1st gen?

This post has been edited by SiKBOY: Jun 24, 2003 - 11:13 AM

[Supersprynt]

the 5sfe is very similar to the 7afe, but not identical. Get pinouts for both and take note of the differences.

[edo17982]

5SFE pinouts to wire AFC are in the apexi manual.....take a look.

[SiKBOY]

I bought this thing in Japan and its all in Japanese. Anyway, they dont have a listing for the 5SFE because I dont think that they even have a 5SFE engine in Japan.

Any other help would be really appreciated. I think its the T5-C diagram but I want to be absolutly sure before I go splicing.

This post has been edited by SiKBOY: Jun 24, 2003 - 2:01 PM

[edo17982]

you should follow the diagram of the 3SFE in function of your transmission and year.
Persons with 7AFE have to follow diagrams for 4AFE in function of your transmission and year.

[west_minist]

My 2cents worth here!

http://www.apexi.com

Check for documentation.

Knocking is normal guys. You cannot stop it, but you can minimise it.

Once you have the correct a/f ratio and stock timing and tuning, then take your values from there.

One thing that you need to get straight is the figure over a period of time. That is, it it calculated for per min? If so, those values seems quite normal.

The thing is, get a base like (except edo since he have 12+:1 compression) with stock settings.

[HyperDeathKill]

Apexi.com doesn't say anything. I suppose some knocking is normal. I mean, I didn't hear anything before, and my car is kind of close to stock ( intake, exhaust, underdrive and s-afc). I'm going to run high octane and see if it still knocks. I'll write back.

[SiKBOY]

HyperDeath, did you use the T4-f diagram to wire it up? Im just double checking if I have my information right.

[Delta_Phoenix]

I received my S-AFC today and the manual does not list the 5S-FE. It only lists 3S-series engines.

[SiKBOY]

Yeh Im still looking which diagram to follow on the pinouts from the ECU
Toyotacelicaonline.com says to follow the T5-c diagram and then the 3SFE diagram is a different diagram so im stuck!

[HyperDeathKill]

I used the one that toyotacelicaonline said to use. It's T5-C, I just checked it. That one works perfectly for the 5sfe ST204 Celica GT, and I do belive that's the same one as the 3sfe. But I definitly used T5-C.

Oh, and I recommend sodering the wires together. It doesn't take much longer and it gave me more peace of mind.

[SiKBOY]

Thanks Hyperdeathkill, I'll try and fit the bastard in ASAP.
By the way how did you go with those extractors??

[HyperDeathKill]

Extractors? You mean the thing that splices two wires together? I didn't use those, I just stripped both wires, wrapped one around the other, sodered it (very key point), and then used electrical tape over it.

[kuruptedsnake]

ok where can i get one of these things do they help out alot

[HyperDeathKill]

If you mean a sodering iron (the thing you use to put two wires together), you pick it up at any decent tool store. Home Depot, Sears...uh... other tool stores... It'll be like $60-$100. Just read the instructions, it's easy to use. If that doesn't help you, I could tell you. It's a real useful tool.

[SiKBOY]

I think we got a mix up. Extractors are the same as a header. You were on the lookout for some and I as just wondering if you got a set for your car yet.

I'm still a bit iffy on the SAFC wiring because on the apexi site, They only have the wiring for the 1st SAFC. I bought the SAFC II and I had a brief look at the Japanese manual that it came with and there is 1 extra wire on the diagrams. So that throws a spanner in the works.

Do you have the SAFC with the Dial or the one with the buttons?
I did a search on the MR2 boards on the wiring for the SAFC and they used the T4-f wiring diagram and they said that it worked as well.

Im still lost!.

[SiKBOY]

I FINALLY got this prick in, with dodgey soldering and all.
I followed the T5-C diagram but I don't get a knock reading at all. I get knock readings on the "SENSOR CHECK" under "ETC" of about 20 when just ideling. I double checked my wiring to see if I connected the knocck wire to the correct pinout and its correct.

Have I hooked it up wrong? How can the SAFC get a knock reading on the sensor check and not read any knock on a Channel 1 under "KNOCK"?

Thanks everyone for helping me out. I am probably going to book some dyno time in to get it tuned properly.

This post has been edited by SiKBOY: Jul 1, 2003 - 11:25 PM

[HyperDeathKill]

Did you calibrate your knock sensor? Hey, and when you dyno it make sure to post it online! I'm posting mine tomarrow.