20v no spark & dry plugs.

[Rascal21]

If there had been little oil pressure the needle should have shown that, granted, my engine probably has low oil pressure (Because of the oil sludge)
But in my case it drops all the way down BELOW zero as if the engine was not even running?

Got oil indeed

[jondee86]

Rascal21 Wrote:But in my case it drops all the way down BELOW zero as if the
engine was not even running?

The possibility that comes to mind with this scenario, is a blocked oil
pickup strainer. If the engine is badly sludged, it can happen. So it would
be worthwhile popping the sump plug out and seeing what drains into a
clean pan.

An engine does not need much oil flow at idle, but for sure you should
not try and drive it until you figure out why no pressure

Cheers... jondee86

[Rascal21]

jondee86 Wrote:The possibility that comes to mind with this scenario, is a blocked oil
pickup strainer. If the engine is badly sludged, it can happen.

Exactly what I was thinking, I got some really powerful stuff to take care of that sludge so that and getting all the instruments wired up is main priority right now!

So this means that probably the Oil pressure gauge is correctly connected (Since it does move when starting the car, but drops down because of probably sludged oil pressure sender), at least thats whats best to assume right now.
I have no intentions of opening up anything on the engine yet (I have no experience and am not about to start dinking around with that yet)

I`m still worried that the Tacho is not receiving a signal despite being connected to the instructed pin @ the firewall connector on the engine harness, maybe black-orange is not the correct wire?
The engine ignition system is OEM, bar that the distributor cap has been moved to the front, so there should be no need to change out the resistors and capacitor in the tachometer?
I couldnt find any other black wires at the instrument cluster, except the instrument light wires (Which are black+brown dots)

[jondee86]

I don't know where the tacho signal comes from on a 20V. All i know is
that the AE86 tacho needs the voltage spike from the coil negative. It
will not work with any kind of 5V or 12V signal that might be supplied by
the ECU. Backtrack on your harness tacho wire to see where it is coming
from. If it does not come from the coil, try making a temporary jumper
wire from the coil negative to the tacho input wire.

Cheers... jondee86

[pack]

BUDA has no oil pressure because it's disconnected and that also happens...

When he turns de car on, the needle moves and then goes back to the off position....

Maybe your's is also unplugged?

[Rascal21]

That makes sense Jon!
Maybe the tweakdperformance harness gives signal via ECU, which wouldnt be good!