[Dust]

So I have been seriously considering getting a friends Hilux Surf (4runner with 3.0L 1KZ-TE) when she leaves. Always wanted a diesel, and something bigger than what I have. It’s a 93 or so, and I am sure that is has a lot of soot build-up from 15 years of driving. My question is this. Will the methanol/ethanol/water break stuff up and cause problems in the combustion chamber?

[pacemkr86]

shouldnt cause any problems at all...

<-----works on turbo diesel engines for a living

[Dust]

Just making sure. I was kinda hoping you would reply. Thanks. Just trying to get some talk going and answer some random questions in my head.

[Dust]

Since I have another question, I decided to post it here. I am wondering about how a diesel takes care of changed the A/F when WI in started. Do diesels have o2 sensors? I know it’s stupid, but I am not really sure how a diesel manages it’s fuel air delivery without a throttle plate.

[pacemkr86]

if injecting water it will reduce your egts , then you will be able to run more boost

they dont use a throttle plate,because they have an injection pump.

[pacemkr86]

oh, no they dont use O2 sensors... on any turbo diesel a boost gauge and egt gauge is the best tools for tunning

[Dust]

So how does a diesel know if it's running rich or lean?

[Rocket468]

diesels run and tune way differnt than a gas engine. The more fuel you feed the more air they suck in. There is no throntal body or spark plugs.

[Dust]

I knew about the spark plug glow plug thing, I just don't understand how the computer manages A/F, if there is one.

[pacemkr86]

they use a map or maf sensor, and can tell how much air the engine is moving, or some type of boost reference diaphram on the injector pump.. alot of the older turbo diesel didn't even have computers or sensors..