Technical Fiat punto mk2 1.2 16V petrol engine

[Matthew01]

Hello all,

I have a fiat punto 1.2 16V petrol engine in my garage and, I want to start it on my engine stand. What is the minimum engine configuration that I need to start it? Starter motor, battery, fuel pump, sensors, etc. I want to order all the components at once, and I need a full list. And how to wire an ECU. A long time ago, I started a carburated engine, but now I am confused about how to do it with the ECU engine.
Thanks in advance.

 

[bugsymike]

Hello all,

I have a fiat punto 1.2 16V petrol engine in my garage and, I want to start it on my engine stand. What is the minimum engine configuration that I need to start it? Starter motor, battery, fuel pump, sensors, etc. I want to order all the components at once, and I need a full list. And how to wire an ECU. A long time ago, I started a carburated engine, but now I am confused about how to do it with the ECU engine.
Thanks in advance.

What engine Series and what ecu, I have some pin outs for the older ones to around 1999, mostly single point injection?

 

[Matthew01]

188A5.000 engine 2001 year

 

[bugsymike]

188A5.000 engine 2001 year

If you are using the correct ECU it should be a Motronic ME7.3H4 in which case it is too new for my books, sorry.

 

[GrandePunto PL]

Check eLearn, wiring diagrams, schematics. For example ECU asks BodyComputer if the immobilizer code is valid.
https://aftersales.fiat.com/elearns...nName=Impianto Elettrico&validityName=1.2 16v
So you probably need "hacked" ECU with "immo off" done.
Still not sure if ECU alone will work (without talking to any other modules via CAN). In theory it should. Worth trying.

 

[Matthew01]

Thanks.

 

[judderbar]

Thanks.

If you look in the Punto guides here you can find the pin outs for the ECU just mentioned.

 

[judderbar]

If you look in the Punto guides here you can find the pin outs for the ECU just mentioned.

Sorry it is in the downloads section of this part of the forum

 

[judderbar]

Sorry it is in the downloads section of this part of the forum

Punto ME73H4 ECU pinout.pdf

.

www.fiatforum.com

 

[Matthew01]

Thank you so much, judderbar. You really helped me.

 

[judderbar]

Thank you so much, judderbar. You really helped me.

I have a 16V engine with that ECU. As far as i know, as far as sensors go, the car is only going to need the crank sensor to start. I have no idea if you will also need the matching body computer but they are easy to find.. The camshaft sensor is only there to help it start a few revolutions quicker or report errors but it will run without it. The car starts cold in a default rich position position without oxygen sensor data so presumably you dont need the MAF sensor either. A missing temperature sensor just causes the fan to run continuously at ignition on.

 

[Matthew01]

I understand. As for the electronics, I only need a crankshaft position sensor and ECU.
For now, the parts to order are:
ECU,
Crankshaft position sensor,
Starter motor,
Battery,
Fuel pumps (1 or 2?) one in the fuel tank and one in the engine bay, Am I right?
Ignition coil
Injectors and rail
Please, if I forgot something, correct me.
Sincerely

 

[varesecrazy]

I understand. As for the electronics, I only need a crankshaft position sensor and ECU.
For now, the parts to order are:
ECU,
Crankshaft position sensor,
Starter motor,
Battery,
Fuel pumps (1 or 2?) one in the fuel tank and one in the engine bay, Am I right?
Ignition coil
Injectors and rail
Please, if I forgot something, correct me.
Sincerely

Fuel pump..
Just one, in the fuel tank

 

[Matthew01]

Okey

 

[judderbar]

I understand. As for the electronics, I only need a crankshaft position sensor and ECU.
For now, the parts to order are:
ECU,
Crankshaft position sensor,
Starter motor,
Battery,
Fuel pumps (1 or 2?) one in the fuel tank and one in the engine bay, Am I right?
Ignition coil
Injectors and rail
Please, if I forgot something, correct me.
Sincerely

As far as the ECU goes we dont know what you need. ***Maybe*** if you can get one with immo off it will start but if you got one that was virgin it would need to communicate with a body computer which would access its key information before it would start. But we know if you get the matching set of keys ecu and body computer and locks for about 100 euro it will start.

 

[Matthew01]

Ok. For now, I will try to find an ECU, body comp, key, and lock from the same vehicle.