Toyota Tazz oil pressure problem

Hey there!
Upgrading your Toyota Tazz 2003 with a cluster that includes a tachometer (rev counter) is a cool idea. It can give you better control and insight into your engine's performance. However, you'll need to be careful when swapping out your cluster.
To get a cluster that fits and works properly, you should try to find one from a similar model or year. In this case, you'd ideally want a cluster from another Toyota Tazz 2003 or a similar model within the same generation.
Swapping clusters from different car models can be tricky because the wiring and compatibility may not match. It's important to make sure that the new cluster's connectors, sensors, and wiring are compatible with your Tazz's existing setup. Otherwise, you might encounter electrical issues or inaccurate readings.
If you're not sure which clusters are compatible, it's a good idea to consult with a mechanic or an automotive specialist. They can provide guidance on finding the right cluster and help you with the installation to ensure everything works seamlessly.
Remember, modifying your car's electrical systems should be done carefully to avoid any potential problems. Good luck with your upgrade, and enjoy having that rev counter on your Toyota Tazz!

This will depend on whether that engine uses mechanical or hydraulic tappets. I think that model and year still used the mechanical type. Mechanical ones need a gap, hydraulic ones don't. If yours is the 2e engine, (most versions were), the clearance gap will be 5.965-5.980 mm (0.2348-0.2354 in.)

remove engine from car , remove engine head , remove oil pan , remove each rod from cylinders

earlier 2Es have one inlet one exhaust
after the east west front wheel drive were introduced
most 2E toyota engines have three valves per cyl
two inlets and one exhaust

if you need the correct information on your 2004 2e engine
,,,,undo the rocker cover

oil pressure sending unit may be bad.

you have 2 different problems misfire and jerking sounds like ignition, oil leaks are possible gasket problems.

check idlin solenoid is stuck closed

there is no carb. in modern cars, unless...
2005 Toyota Tazz 130
what country are you in, cabs ended in 2006 in far from USA countries.
so that you? in S.Africa or some small Island in the Pacific running JDM cars?
quote, this you?
A facelifted version of the sixth-generation five-door hatchback was made in South Africa as an entry-level model called the Toyota Tazz from 1996 until July 5, 2006. The Tazz was offered as 130, and 160i. It was also sold as a panel van called the Carri. [4]
end quote.

why not post photo of engine.
or get the FSM on this car, factory service manual, at Toyota.
it covers all THAT.
if not a carb, you cant tune it, like a carb , you fix it.

my first idea> give it a tuneup, new spark plugs, filters.

If its still leaking from the pan gasket then replace the pan and also check if the PCV positive crank case valve is NOT blocked as there could be lot of pressure building up in the engine.

You really need to find out what your oil pressure is. I would connect a manual gauge to get readings...we don't want to take any chances when it comes to oil pressure. If your oil pressure is ok, then most likely the oil sending unit is faulty and will need to be replaced. I hope this helps.