A question about sensors
05-30-2008, 09:14 AM
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A question about sensors What sensors control fuel delivery/management? I already know the MAF, MAP, and the O2's play a huge role in fuel delivery/management. But are there any other sensors that play a part in it?
05-30-2008, 09:35 AM
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IAT and CTS (coolant temp) play fairly vital rolls, more so than the MAF IMO (since you can fall back on the MAP). Not directly related, but Knock Sensor. Depending on if you have it tuned out or not, EGR Solenoid (not a sensor I know.), and that's all I can think of.
05-30-2008, 09:47 AM
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Tells the computer how warm the motor is. Depending on motor temp, it can calc out the optimal fuel required to make the AFR. Pretty similar to the IAT. At least that's my understanding of it.
05-30-2008, 11:58 AM
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Yes and no lol. I figured out why it would fall on its face when I would hot lap it. Turns out when I originally installed my racetronix kit I didn't grind down the ribs in the bucket so the pump never seated in the hole so it was just sucking from the bucket. And when I would hot-lap it it would use all the fuel in the bucket and the pump would cavitate.
But now I'm having another problem where after the car warms up it goes so lean that it doesn't even register on my wideband. And if you try and press the pedal in it just putts along and has no power. And I know its not anything in the fuel system because its got new injectors, new filter, new pump, and new regulator. So I figured it has to be a sensor. like the sensor isn't senseing the real amount of air thats coming in the intake. And I already replaced the MAF and IAT.
This car is making me go insane
But now I'm having another problem where after the car warms up it goes so lean that it doesn't even register on my wideband. And if you try and press the pedal in it just putts along and has no power. And I know its not anything in the fuel system because its got new injectors, new filter, new pump, and new regulator. So I figured it has to be a sensor. like the sensor isn't senseing the real amount of air thats coming in the intake. And I already replaced the MAF and IAT.
This car is making me go insane
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05-30-2008, 12:47 PM
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I've tried scanning the car and no codes pop up.
After it acts up, if I turn it off and let it sit for an hour or two and I go back out and start it up again, it'll start acting up right away, even while its still in open loop
After it acts up, if I turn it off and let it sit for an hour or two and I go back out and start it up again, it'll start acting up right away, even while its still in open loop