Knock sensor?
My car is 88 n/a with a jdm s5 T2 swap. All s4 electronics. While driving the car around corners the car will buck like crazy. Knock sensor retarding the timing? If so can u just unplug it?
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Only around corners?
Check the sock on the fuel pump. |
Originally Posted by clokker
(Post 11312426)
Only around corners?
Check the sock on the fuel pump. |
+1 Fuel Pump sock filter. I don't think the knock sensor does much of anything to begin with...
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Originally Posted by texFCturboII
(Post 11312442)
+1 Fuel Pump sock filter. I don't think the knock sensor does much of anything to begin with...
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It will supposedly retard timing...
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Originally Posted by texFCturboII
(Post 11312472)
It will supposedly retard timing...
I agreed it probably won't react fast enough to save a badly detonating engine. It was made to save a stock setup with a little twitch i.e. a cold night, bad gas, wastegate line that popped off, etc... Not a 400 hp turbo. |
Originally Posted by Vert88t2
(Post 11312445)
The knock sensor will retard the timing 20 degrees. That's why l was thinking this or grounds.
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Originally Posted by Vert88t2
(Post 11312445)
The knock sensor will retard the timing 20 degrees. That's why l was thinking this or grounds.
Seems like any bump would activate a malfunction that bad. 15-20 minutes should get you to the fuel sock to either confirm or deny my guess, which is a whole lot less time than chasing ground issues. Do the easy stuff first and maybe you'll get lucky. |
Originally Posted by clokker
(Post 11312562)
Dunno nuffin about knock sensors since S5s don't have them but why in the world would a bad ground only fritz out in corners?
Seems like any bump would activate a malfunction that bad. 15-20 minutes should get you to the fuel sock to either confirm or deny my guess, which is a whole lot less time than chasing ground issues. Do the easy stuff first and maybe you'll get lucky. |
Hmm.
Maybe.....I bet you didn't cut the wire that controls the PS. when you hook up the N/A harness to the TII Ecu you need to clip a wire. In a N/A it is for PS but when it gets converted it goes to Knock sensor. If not it retards timing when you turn. Hailers had a write up on it I believe. |
Originally Posted by misterstyx69
(Post 11313115)
Hmm.
Maybe.....I bet you didn't cut the wire that controls the PS. when you hook up the N/A harness to the TII Ecu you need to clip a wire. In a N/A it is for PS but when it gets converted it goes to Knock sensor. If not it retards timing when you turn. Hailers had a write up on it I believe. |
4 Attachment(s)
P/S wire is probably still hooked up and causing timing retard. If you didn't fix yet I have pics of what wires needed to be pulled. I did the same wasp on my S4 Vert 2 years ago...
Attachment 684972 Attachment 684973 Attachment 684974 Attachment 684975 |
Originally Posted by DeMoe Aurelius
(Post 11351811)
P/S wire is probably still hooked up and causing timing retard. If you didn't fix yet I have pics of what wires needed to be pulled. I did the same wasp on my S4 Vert 2 years ago...
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I know nothing about diagnosing your issue. However, on my S4 T2, I found that the pc board inside knock box was cracked in half. Might want to check yours to see if it is still intact. My girlfriends knock box is stillin one piece.
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Originally Posted by tuscanidream
(Post 11353745)
My girlfriends knock box is stillin one piece.
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Originally Posted by RXSpeed16
(Post 11353763)
:awesome: New favorite rotary pun.
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Originally Posted by tuscanidream
(Post 11353745)
My girlfriends knock box is stillin one piece.
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Going Thru The Same Swap and Issues
Originally Posted by DeMoe Aurelius
(Post 11351811)
P/S wire is probably still hooked up and causing timing retard. If you didn't fix yet I have pics of what wires needed to be pulled. I did the same wasp on my S4 Vert 2 years ago...
http://i665.photobucket.com/albums/v...y/IMAG0781.jpg http://i665.photobucket.com/albums/v...y/IMAG0780.jpg http://i665.photobucket.com/albums/v...y/IMAG0779.jpg http://i665.photobucket.com/albums/v...y/IMAG0778.jpg |
NA doesn't have a knock box, if you use the NA harness and if your Vert use your stock N338. If you use TII harness you have to pull and change wires to get the na cluster to work. Also to use the S5 TII alt you have to pull and change a couple of wires and run one to the main power on the alt to the fuse panel under the hood.
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Yes NA doesn't have a knock box, if you use the NA harness with a turbo swap the power steering wire on the NA harness runs into the pin for the knock sensor on the turbo ecu.
So when he turns the wheel the computer thinks the knock sensor is detecting knock so it retards the timing. Edit: https://www.rx7club.com/2nd-gen-archive-72/s4-na-turbo-swap-details-813825/ "" I can't remember which wires you need to trip but I know one of the NA wires that go to the power steering goes to the knock sensor system on the TII's so... not fixing the wire problem means when ever you turn the wheel your ECU will retard the timing 20 degrees."" |
Originally Posted by MrGoodnight
(Post 11355146)
Yes NA doesn't have a knock box, if you use the NA harness with a turbo swap the power steering wire on the NA harness runs into the pin for the knock sensor on the turbo ecu.
So when he turns the wheel the computer thinks the knock sensor is detecting knock so it retards the timing. Edit: https://www.rx7club.com/showthread.php?t=813825 "" I can't remember which wires you need to trip but I know one of the NA wires that go to the power steering goes to the knock sensor system on the TII's so... not fixing the wire problem means when ever you turn the wheel your ECU will retard the timing 20 degrees."" ... |
Originally Posted by Vert88t2
(Post 11355442)
I have the s4 n/a harness. But I'm running all s4 ecu, afm, etc... ... Look for the pin out on the turbo ecu, find the wire for the knock sensor. Cut that wire with enough length (3 inches) so you can crimp or solder it back together if you need to. Drive as you would and see if your issue is gone. I just did my turbo swap in December and I'm not having any issues. S4 NA car, harness, n332 ecu, n318 maf and pressure sensor. |
Originally Posted by MrGoodnight
(Post 11355474)
Okay, so that still applies to what I said. S4 turbo ecu, maf, and pressure sensor, but NA harness correct? Look for the pin out on the turbo ecu, find the wire for the knock sensor. Cut that wire with enough length (3 inches) so you can crimp or solder it back together if you need to. Drive as you would and see if your issue is gone. I just did my turbo swap in December and I'm not having any issues. S4 NA car, harness, n332 ecu, n318 maf and pressure sensor. ... |
Ok so I clipped 1R, 2K, and 3D. Much better. Thanx guys
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