Toyota 5A ( 16 valve) vacuum lining diagram

[salman108]

Hello

Does anyone have the vacuum lining diagram for Toyota 5A engine ?

My car has a problem with irregular RPM, specially when the car is in D or R, while brake is pressed.

Can someone help please ?

regards.

[helper_learner]

@Hassan1991
@dani_kk

[Hassan1991]

Will share it shortly.

[salman108]

Looking forward @Hassan1991

I need to fix this very urgently.

Thanks and regards.

[Hassan1991]

Here.
Go to carburettor and vacuum piping.

[salman108]

Dear @Hassan1991,
Thank you very much for the link, much appreciated,

Now i need someone in Rwp/Isb to do this for me.
Can someone suggest a mechanic that they have tried ?

regards

[helper_learner]

Now i need someone in Rwp/Isb to do this for me

Best is to do a DIY, It is fun.

BTW you can visit @dani_kk or @rajaatta, They will do it.

[rajaatta]

I will recommend a diy where all of us can help him solve the issue

[salman108]

I am on the DIY thing,
just that i have not been able to find a diagram that matches what I have.

I have a 5AH engine, and corresponding ECU.

however the diagrams are different to what I have.

I went into AE100 / set the color and trim, and then vacuum lining.
and it resultant figure is very different.

@rajaatta what do you suggest ?

[salman108]

Here is my problem,
there is only one pipe in the actual TBC, where as almost all the diagram posted by @Hassan1991 have 3 or 2 pipes coming out of the throttle body.

I have connected that one pipe to the vacuum canister for now ( after i took these pics ), the remaining I have no idea where do they go and what they do,

Please help/

[Hassan1991]

Your engine is 5AFE (efi) not carby.
Check where these lines lead to. There would be pipes connected under the manifold.

[rajaatta]

Salman have this vehicle is swapped recently ?
From 2e to this engine?

[salman108]

@rajaatta

yes indeed that is the case,
the previous owner did the swap,
however as expected the effort was minimum.

This seems to be a 3rd gen 5A engine with multiple pipes DC, or even plugged.
I am assuming the EGR is not working and the ECU is getting false readings on valve activation.

Regards.

[rajaatta]

Salman I asked because a gentleman with same swap with white Indus Corolla visited me 2-4 days back and I suggested to get the ecu wired up properly and reffered him to electrician. I thought your vehicle is the same one

[salman108]

@rajaatta

I am the same gentleman.
I already got the wiring loom cross checked by 2 people, Malang and another fellow.
the car is performing almost alright now, just need the vacuum sorted out now and a couple of other things.

Regards.

[rajaatta]

Oh that's a good thing man how is the idle control valve now ? Working perfectly?

Okay let's start with dusting some old books.
Do you have the ecu picture ??
Just need to find the actual vacuum diagram according to ecu.

[salman108]

I checked the ECU is indeed 5A , automatic transmission.
Ive learned a thing or two about the ICV, will need to check that tomorrow in daylight.

lets see tomrrow.

[salman108]

For anyone who will come to this thread henceforth,
I am attaching the Toyota repair manual instruction set.

Basically you have to take care of 2 sensors, the throttle position sensor, and engine idle sensor.

The throttle position sensor does what it's name suggests, it tells the computer how much the driver is pushing on the accelerator and accordingly the computer allows that much fuels, and adjusts timing of the engine (VVTI).

The IVC sensor is a little bit tricky, it waits until the engine is hot enough, then it allows a certain amount of choke ( for lack of better term ) that keeps the engine running at correct RPMs.
This sensor is critical in case of AC, steering pump load, and general idle conditions.

The last thing one needs to learn is the EGR, which dictates how much of the exhaust gas gets recirculated. The higher the RPM the more gas may be mixed with new air/fuel mixture to increase efficiency. It is very common for the EGR to get stuck, as it is a dirty valve.

@rajaatta
repair guide.pdf (769.5 KB)

[rajaatta]

Brother our engine is 5a?

[salman108]

@rajaatta

yes it is 5A;