ECU timing control

Changing the position of the distributor will alter ignition timing too.

im curious about after Base timming is set, I want to know wat can make the ecu adjust timming

Knock sensor would be the only thing that I can think which would send signals to the the ECU which may result in the alteration of the ignition timing should the ECU sense that something is going wrong.

I was told by one person if the car is running hot (or possibly has a bad coolant sensor) then it's possible the ECU will retard timing. I have no reason to doubt this guy, but I've never seen/heard anybody else mention this.

Why... what's going on?

Steve

I thought that if it's hot the ECU would make it run rich but not retard the timing... any idea... ill swap coolant sensors tonite..can't hurt

my situation is like this... i run emanage on my VE along with other mods but my timing is jumping around like crazy but i didn't know it until i went to tune it today and i don't care if it goes to 5 because i'll just correct it with the emanage but i can't get it to hold still it will go into timing mod just find but if i check timing with the tps hooked up it goes crazy

Se-Rious92sentra said:

I thought that if it's hot the ECU would make it run rich but not retard the timing... any idea.

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I'm not sure. I, too, thought the knock sensor was the only thing that would pull timing.

Which coolant temp sensor are you using... the one from the VE or the DE? I'm using the one from the DE. Is it possible the VE temp sensor is rated for a different range?

I know im stating the obvious.... but just in case. The MAF sensor and engine RPM will cause the ECU to adjust the timing

im using the ve sensor because it clips in and i've never heard of changing it,,,hummmm... did u ever use the ve sensor?

Se-Rious92sentra said:

im using the ve sensor because it clips in and i've never heard of changing it,,,hummmm... did u ever use the ve sensor?

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I'm pretty sure I used both DE coolant sensors (one read by the ECU, the other for the dash gauge). I have a vague recollection of using the VE coolant sensor (for the gauge, spade connector) but it didn't work right with the dash gauge so I swapped it. You might want to check the VE section to see what everyone else is using.

Steve