Engine knocks unless I use 93 + octane booster !?!
11-12-2002, 01:25 PM
#1
Engine knocks unless I use 93 + octane booster !?!
I have a JWT ECU and unless I add a can of octane booster to every tank of gas (93 octane), I get the 0304 code. On tanks with the octane booster, no code. What's the deal? I use the NOS Street Formula Octane Booster. Supposed to raise the octane level 3 points in 16 gallons of gas. Surely you don't have to run 96 octane with these ECU's. What else would cause this? It get's really expensive when gas prices go up.
11-12-2002, 01:30 PM
#2
Wow, it shouldn't knock.
1) ecu program is advancing the timing too much. Have to send the ecu back or hook it up to a Nissan consult to see the timing curve.
2) OEM DET sensor could be bad and NOT pulling the timing back when it should be.
3) OEM base timing could be wrong. Timing light? Or Nissan consult to verify.
1) ecu program is advancing the timing too much. Have to send the ecu back or hook it up to a Nissan consult to see the timing curve.
2) OEM DET sensor could be bad and NOT pulling the timing back when it should be.
3) OEM base timing could be wrong. Timing light? Or Nissan consult to verify.
11-12-2002, 01:35 PM
#3
I just got a Techtom.
The ignition timing numbers jump all over the place. Do you know what the timing should read with the JWT. Under the hood it reads the stock timing is supposed to be 15 degrees BTDC. What's BTDC? What does JWT raise it to? The highest it's ever read while sitting at idle is 15. It usually jumps around at 9, 11, or 15 at idle. 
11-12-2002, 01:37 PM
#4
Lifetime Maxer
Join Date: Mar 2001
Posts: 480
Re: I just got a Techtom.
Originally posted by BSwithTF
The ignition timing numbers jump all over the place. Do you know what the timing should read with the JWT. Under the hood it reads the stock timing is supposed to be 15 degrees BTDC. What's BTDC? What does JWT raise it to? The highest it's ever read while sitting at idle is 15. It usually jumps around at 9, 11, or 15 at idle.
The ignition timing numbers jump all over the place. Do you know what the timing should read with the JWT. Under the hood it reads the stock timing is supposed to be 15 degrees BTDC. What's BTDC? What does JWT raise it to? The highest it's ever read while sitting at idle is 15. It usually jumps around at 9, 11, or 15 at idle.
I hope that's not the case.
11-14-2002, 09:24 PM
#9
Re: I just got a Techtom.
Originally posted by BSwithTF
The ignition timing numbers jump all over the place. Do you know what the timing should read with the JWT. Under the hood it reads the stock timing is supposed to be 15 degrees BTDC. What's BTDC? What does JWT raise it to? The highest it's ever read while sitting at idle is 15. It usually jumps around at 9, 11, or 15 at idle.
The ignition timing numbers jump all over the place. Do you know what the timing should read with the JWT. Under the hood it reads the stock timing is supposed to be 15 degrees BTDC. What's BTDC? What does JWT raise it to? The highest it's ever read while sitting at idle is 15. It usually jumps around at 9, 11, or 15 at idle.
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