NADIA D4 1998 Toyota engine cutting.Changed oil,fuel and air filters.How do I fix it?

Clean the Throttle body and MAF. They govern how much fuel and air you need to run the engine under The load that your accelerator is at.

It could also be the throttle position sensor.

This is a Japanese model only sold in Japan. We are in North America.

https://www.google.com/search?q=Toyota+Nadia

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The high pressure fuel pump is leaking fuel past its seals into the engine oil.

The hp fuel pump is located on the valve cover.

The oil level will not rise because when the oil is contaminated with fuel, it's viscosity is affected, and it will make the engine burn more oil.

You will need to replace the High Pressure Fuel Pump, drain and fush oil and replace oil filter.

fuel filter fuel pump

these Direct injection engines do carbon up the inlet ports
inlet manifold off to clean the ports

69. 1999 Toyota Nadia 3S-FE D4 Diract injection engine - AECS

www.aecs.net/techniek2009/badinjection.pdf

Sounds like a personal problem; check the fuel pump for sufficient fuel pressure and when was the last time the fuel filter was replaced?

If it is a diesel then dark engine oil is normal as it is carrying the carbon from combustion in suspension. If it is a petrol engine the black oil is an indication of compression fire getting into sump and burning the oil That may relate to rings , or bore problem. Check the oil that you used as it should be 20w-50 at least for either diesel or petrol. Have a compression test done on either engine to determine engine condition.

The moment we import our cars here in africa they would have been used so we need to remove sludge from the top to the bottom that is the only way you can say you are safe cause engine flush won't clear the dirty inside

Black oil on the dipstick is normal

Need more info......Need mileage..,when was it tuned up and or serviced last...Need all codes showing on scanner..Did a Common garage replace your parts or are you a do it yourselfer..?..How long has this been happening ..How far has it been drove when it started happening..?

Hello Louis,

As you have no doubt learned by now, the only way fuel can get into the oil is via the injectors (carb?) and for that to happen a stuck injector had to be pouring gas into the intake, where it bypassed the rings and joined oil in the sump.

That's a lot of gas! Car must have been running horribly. If the gas was in the sump long enough to thoroughly dilute the oil, you may also have bearing damage from inadequate lubrication.

First, fix the source of the gas, then carefully check for oil pressure.

No easy fix, in that case??.

all the best.

hi

i have a toyota nadia 1999 model, there are times when the engine shakes and just cuts off.I have changed the battery and i am failing to understand the cause