Can I run without my knock sensor??
Thread Starter
Junior Member
Joined: Jun 2001
Posts: 10
Likes: 0
From: San Diego, CA
Can I run without my knock sensor??
I'm about to drop my new motor in but before i do i wanted to know if i can run with out the knock sensor... i don't care about the saftey issuse..... i am worried about the car not running well because it might screw with the computer.... i will be running a TPIS level VI computer prom... i heard of people disconnecting the wire from it but i just want to get your info... thanks
Supreme Member
Joined: Jul 1999
Posts: 5,183
Likes: 42
From: Oakdale, Ca
Car: 89 IrocZ
Engine: L98-ish
Transmission: 700R4
Well, I know it will set off the DES light, and code 43??? will pop up. I tried this once in a Suburban, and didn't really notice any performance loss...but not that you could tell from a 230HP 5000lb sled.
Supreme Member
Joined: Mar 2001
Posts: 2,047
Likes: 0
From: The State of Hockey
Car: 1987 Trans Am GTA
Engine: Miniram'd 383, 24X LS1 PCM
Transmission: TH700R4, 4200 stall
Axle/Gears: 9", 4.33:1
I wouldn't disconnect it. You will want the car to pull some timing out if it starts to knock and if you disconnect the knock sensor, it will not 'hear' any knock. Disconnecting it may even throw the car into some sort of limp home mode.
If TPIS is worth half of what they charge on their parts, they will program the EPROM to only pull small amounts of timing away when at WOT and knock is detected due to any false knock it may hear. That way you will not notice any performance loss due to excessive timing retarding by the EPROM calibrations being implimented to stop knock that may be false.
You do want the knock sensor system there as a safety measure - especially if you have cast pistons......
my $.02
------------------
1987 GTA L98 MD8 GH3
355 '97 Vortec 4-bolt block, TRW(suck) forged pistons 10:1 CR, TFS 23*, LT4 Hot Cam, Ported plenum and intake, SLP Siam Runners, Edelbrock TES, gutted Cat, Flowmaster, K+N cone, AFPR, TB bypass, AirFoil, !AIR, !A/C, !EVAP, ARAP, 2300 stall, Hotchkis STB.
If TPIS is worth half of what they charge on their parts, they will program the EPROM to only pull small amounts of timing away when at WOT and knock is detected due to any false knock it may hear. That way you will not notice any performance loss due to excessive timing retarding by the EPROM calibrations being implimented to stop knock that may be false.
You do want the knock sensor system there as a safety measure - especially if you have cast pistons......
my $.02
------------------
1987 GTA L98 MD8 GH3
355 '97 Vortec 4-bolt block, TRW(suck) forged pistons 10:1 CR, TFS 23*, LT4 Hot Cam, Ported plenum and intake, SLP Siam Runners, Edelbrock TES, gutted Cat, Flowmaster, K+N cone, AFPR, TB bypass, AirFoil, !AIR, !A/C, !EVAP, ARAP, 2300 stall, Hotchkis STB.
Supreme Member
Joined: Apr 2001
Posts: 4,969
Likes: 0
From: USA
Car: yy wife, crazy.
Engine: 350, Vortecs, 650DP
Transmission: TH-350
Axle/Gears: 8.5", 3.42
The ESC will not get a signal from the knock sensor, so the ECM will run full advance (at least when it thinks it needs it) all the time. I've heard of guys doing this at the strip so that the timing is never retarded, for risk of loosing power. But they are taking a bigger risk, like loosing a piston. Ok if your running something higher that 93 octane. But who does that on a stock motor? And as mentioned by 8mike9, you will get a code 43.
And what Matt said, I agree. Why would you want to risk hurting a new motor?
And what Matt said, I agree. Why would you want to risk hurting a new motor?
Thread
Thread Starter
Forum
Replies
Last Post
