Finaly 5AFE Swapped in EE90

[Xulfiqar]

Hmm But how can this IGF signal be same like compressor RPM signal

M i asking too many questions (A)

the compressor rpm sensor pulses twice every crank rev - that means half a cam rev - the IGF puts out two pulses every half a cam rev.

the signal wave is nearly the same shape too.

[Vaqas1]

the compressor rpm sensor pulses twice every crank rev - that means half a cam rev - the IGF puts out two pulses every half a cam rev.

the signal wave is nearly the same shape too.

Okay. This Saturday I am gona try this

I will let you kno the results. Thx

[Xulfiqar]

firstly I would like you to post your ECU no. so I can see what the ACT pin in your case will control, in some toyota ECU's the ACT line is a clutch cut off (as in full throttle burst of acceleration).

[Vaqas1]

firstly I would like you to post your ECU no. so I can see what the ACT pin in your case will control, in some toyota ECU's the ACT line is a clutch cut off (as in full throttle burst of acceleration).

This is the ECU 89661 -1A120

Pins

[Xulfiqar]

the act pin is a moment switch in your case - dont use it, simply wire up the ac1 pin and isc pin

[Vaqas1]

So no need to install the Relay for IGN to ACT.

Just i will wire AC1 pin with a/c switch and isc with ac VSV negative.

But why no ACT in this ECU i mean timing advance and everything will work without it?

[Vaqas1]

Ok Xulfiqar bhai i connected the AC1 pin to thermostate positive and connected ISC to VSV.

Now i was about to wire this than I saw original wiring of VSV cut and it had positive coming from Ign relay and ISC pin also there (Checked continuity of ISC pin with this wire)as you can see in the pic so i just connected the original wires to vsv and its working.

Now i tried two things are happening.

My RPM with a/c is staying a bit low original RPM is at 900 when i turn on a/c it goes to 800 it use to goto almost 1000 before. I trid to adjust it from vacuum solenoid but that is already at max.

Any effect on pickup I feel there is improvement but i will tell you after testing it for a day or two.

So now the a/c is kind of wired with ECU and not hot wired, thanks to you.

Once again uncut wiring helping

pic of the original vacuum solenoid wire.

[zesti]

Hello Vaqas,
Thanks for reply and contact info. I also sent a request to Sinner and got a quick reply with valuable information, in fact I was doubt full if you people are still following this thread. Anyway thanks again.
Now come to problem. I have recently swapped my good old 2.OD with 5A-FE, auto trans., 5A-FE 4/AT ECU. The engine is excellent as couple of mechanics asked me who chose the engine. The problem is the electrician, I believe the ECU wiring is not correct. Although I'm converting to CNG but want my motor perfect on Gasoline. For now I'm trapped between mechanics because the pick is not as it should be. Kindly advice an electrician for EFI in twin city.

[Xulfiqar]

Ok Xulfiqar bhai i connected the AC1 pin to thermostate positive and connected ISC to VSV.

Now i was about to wire this than I saw original wiring of VSV cut and it had positive coming from Ign relay and ISC pin also there (Checked continuity of ISC pin with this wire)as you can see in the pic so i just connected the original wires to vsv and its working.

Now i tried two things are happening.

My RPM with a/c is staying a bit low original RPM is at 900 when i turn on a/c it goes to 800 it use to goto almost 1000 before. I trid to adjust it from vacuum solenoid but that is already at max.

Any effect on pickup I feel there is improvement but i will tell you after testing it for a day or two.

So now the a/c is kind of wired with ECU and not hot wired, thanks to you.

Once again uncut wiring helping

pic of the original vacuum solenoid wire.

The VSV should be able to adjust the rpm to about more than a 1000 rpm if you unscrew the plastic allen socket screw, because the pipes are very thick and can pass a lot of air, check the ports for blockage, and I hope you are using the correct VSV for this application.

The ACT pin actually grounds in the ECU depending on need as seen by the ECU, as high engine temperature or high load call from the driver (sudden acceleration).. but you need an A/C amp to make it function properly.

[SER_GTR]

Lmao....!!!

[Xulfiqar]

why?

[Vaqas1]

VSV is fine and of this engine. actually i checked it without compressor load and if engaged takes rpm to 1500 but with compressor load that came down to 900 hmm anyways i will check for blockage or maybe using pipes more thick than the ones i am using.

the screw that is at max.

AC Amp is not available in my car

Farrukh kia hova bhai? ab tu masail hal ho chuka hai hehe.

[Xulfiqar]

the ports should be squeaky clean and the air pipes should be kind of rigid too, as normal made in Faisalabad pipes collapse under suction.

[Vaqas1]

Hello Vaqas,
Thanks for reply and contact info. I also sent a request to Sinner and got a quick reply with valuable information, in fact I was doubt full if you people are still following this thread. Anyway thanks again.
Now come to problem. I have recently swapped my good old 2.OD with 5A-FE, auto trans., 5A-FE 4/AT ECU. The engine is excellent as couple of mechanics asked me who chose the engine. The problem is the electrician, I believe the ECU wiring is not correct. Although I'm converting to CNG but want my motor perfect on Gasoline. For now I'm trapped between mechanics because the pick is not as it should be. Kindly advice an electrician for EFI in twin city.

What kind of issues you are having? To be honest mujha tu koi kaam ka electrition nahi mila in Pindi market who really understand wiring. I mean jo sub sey bara ustaad tha he asked me 1500 Rs for check engine light which i later connected in 5 mins by the help of Farrukh

[SER_GTR]

LMAO On Brain bashing.....)
@Waqas.....Lolxx.......The CEL Part Was Actually A JOKE Bara Ustaad Cracked )

[Vaqas1]

the ports should be squeaky clean and the air pipes should be kind of rigid too, as normal made in Faisalabad pipes collapse under suction.

Ports are clean and pipes i am using are thick ones not local.

The issue is the return pipe from VSV if I dissconect it the rpm gets better.

So i did a experiment.

If you give ac1 positive not only the rpm drops from 800 to 600 without a/c and if on a/c same things happens even when ac1 got positive my els raise of 100rpm also stops working.

So i tried hot wiring it again the way it was without ac1 and rpm is normal now raises to 1000 when a/c is on.

Hmmm strange issue btw we tried to check if ac1 pin positive have any effect on timing and there was none.

[zesti]

Thanks again for your reply.
The PM I sent you should be on this thread. Any way, my problem is to find any knowledgeable electrician. Who can check and fix all the sensors. My car is in CNG fitting stage. Will look into wiring by myself tomorrow.
There are all kind of issues like idle rpm not stable, car acceleration is not up to performance. So far one electrician tweaked with TPS to satisfy my complain about low pickup. Now it also clear to me that I have to something my self. I'm basically electronics engineer and can clearly understand the terms. I'm trying to collect as much information about EFI system and surely will share with all you guys.

[zesti]

Hi all,
I've got a valuable document for the serious researchers of Toyota EFI system. Send a PM to me whoever require it. It's quite technical that's why I asked only to serious researchers also with technical know how or background.

[Vaqas1]

If you scroll back you will find how to adjust TPS properly. I hope no one played with your throttle stop screw.

First thing you must do is if you have check engine light you must connect its wire to W pin of the ECU. Than you must short E1 and TE1 on your diagnosis plug (that will be with wiring in engine bay)to get codes out of your ecu. Than you can figour out which sensors are not present or not working.

Swaps are not easy and as you can see this big thread is all about the problems I faced.

If you dont know about your ecu pins open up the ECU you will see each pin with clearly mentioned function on the board.

First few things you must do is make sure your ECU Batt and +B are with individual fuse of 15 Amp. BATT must have a live wire coming from battery positive (So ECU remembers its settings) +B should have power with Ignition switch coming from ignition relay.

Your Fuel pump I am sure must be wired with IGN switch now it should be with Circuit Opening Relay you can scroll back and find how to do it. When you switch to CNG get a relay installed so Fuel pump stops working when your car is on CNG.

Did you work on your exhaust? that also plays a role Maybe you got a Diesel so pipe size might be good enough for this engine.

TPS of this engine is very sensitive i adjusted it in my way I mean the proper way didnt work for me. even slightest of adjustment u can do will have a lot of effect on RPM. I remember even very slight adjustment use to drop my rpm to 500 from 900.

Make sure the MAP sensor you are using is the correct one. you can also see the correct ones mentioned in this thread.

These engines usually dont need tappet adjustments this early but you can get it checked.

Baki you will have to slowly get things right one by one.

Its been 7 months i swapped my engine still working on small issues lol thanks to people like Farrukh and Xulfiqar learned so much from them

[Xulfiqar]

Ports are clean and pipes i am using are thick ones not local.

The issue is the return pipe from VSV if I dissconect it the rpm gets better.

So i did a experiment.

If you give ac1 positive not only the rpm drops from 800 to 600 without a/c and if on a/c same things happens even when ac1 got positive my els raise of 100rpm also stops working.

So i tried hot wiring it again the way it was without ac1 and rpm is normal now raises to 1000 when a/c is on.

Hmmm strange issue btw we tried to check if ac1 pin positive have any effect on timing and there was none.

The timing change cannot be checked with a timing light. Anyway - your issue is very very odd, the rpm should remain constant with or without hot wire or ecu.