Fuel Cut Defender For 7mgte ????

rnoswal · 03-01-2006, 02:04 PM

Well no mods to speak of yet, but I will in the near future. That is why I was asking about the pressure sensor. I notice there is on on the driver side engine compartment between the fender and the top of the shock tower. Does this sensor just measure fuel pressure and if it drops too much then it shute the engine down to protect it? And if so is that how you can make it stop cutting the engine just by adding a walbro or other high volume pump?

According to my aftermarket boost guage I am right at 10 psi. I played with the adjuster and got more boost but it didn't take long for it to shut the engine down for a few seconds. I know the stock turbo and wastegate won't go much past what I am putting it at and I know I need a better head gasket, etc..... but I am very curious about why and how the sensor shuts down or limits the engine if you over boost.

I thought it might be sensing the boost level, but now I wonder if it is a fuel pressure sensor or does it measure the boost and the need for fuel. If it doesn't sense enough fuel for the boost given it, is that why it shuts down or acts like a rev limiter.

I guess I am asking then, if I put a walbro fuel pump in it and then turned the boost up, would it continue to shut down or does that fix that problem. Blowing the engine up not withstanding I mean.....lol

Thanks

Russ

03-01-2006, 02:04 PM	#7
rnoswal Lexus & 550's Join Date: Apr 2005 Location: Bossier City LA Posts: 556	Well no mods to speak of yet, but I will in the near future. That is why I was asking about the pressure sensor. I notice there is on on the driver side engine compartment between the fender and the top of the shock tower. Does this sensor just measure fuel pressure and if it drops too much then it shute the engine down to protect it? And if so is that how you can make it stop cutting the engine just by adding a walbro or other high volume pump? According to my aftermarket boost guage I am right at 10 psi. I played with the adjuster and got more boost but it didn't take long for it to shut the engine down for a few seconds. I know the stock turbo and wastegate won't go much past what I am putting it at and I know I need a better head gasket, etc..... but I am very curious about why and how the sensor shuts down or limits the engine if you over boost. I thought it might be sensing the boost level, but now I wonder if it is a fuel pressure sensor or does it measure the boost and the need for fuel. If it doesn't sense enough fuel for the boost given it, is that why it shuts down or acts like a rev limiter. I guess I am asking then, if I put a walbro fuel pump in it and then turned the boost up, would it continue to shut down or does that fix that problem. Blowing the engine up not withstanding I mean.....lol Thanks Russ