Fail MAP

[jccorredor96]

Hello everyone!!

I just bought a León Cupra mk2 with 387 hp, BWJ engine, and I have a problem, I bought it knowing that the flow meter was bad... they are not worth much so I didn't give it importance, the issue is that I have already installed 3 flow meters and none of them work... I am attaching photos of the diagnosis to see if someone can give me a hand

Could it be that the map is poorly made? Or do I need a flow meter with a higher flow rate?

Thank you very much in advance

 

[R3k1355]

Have you checked the wiring to make sure it's not a broken wire or damaged connector?

 

[jccorredor96]

Have you checked the wiring to make sure it's not a broken wire or damaged connector?

How do I check? It doesn't understand electricity well, the MAP connector only has 3 wires

 

[mty12345]

How do I check? It doesn't understand electricity well, the MAP connector only has 3 wires

It's the MAF sensor not the MAP sensor, they are 2 different things.

Unplug the plug, use a multimeter to check you have voltage on one of the pins. When you find that pin, try moving the wiring around and checking if the voltage disappears in a certain position. Use thin probes and don't push them into the connector, or you may spread the pins open too far, just rest the probes against them. If you're unsure then maybe just best to take it to a garage.

This video may help you.

 

[jccorredor96]

It's the MAF sensor not the MAP sensor, they are 2 different things.

Unplug the plug, use a multimeter to check you have voltage on one of the pins. When you find that pin, try moving the wiring around and checking if the voltage disappears in a certain position. Use thin probes and don't push them into the connector, or you may spread the pins open too far, just rest the probes against them. If you're unsure then maybe just best to take it to a garage.

This video may help you.

Sorry friend .. MAF sensor I got the wrong letter haha thanks a lot, I will try to test it in the next few days, if not I will go to a workshop as you told me

 

[jccorredor96]

Have you checked the wiring to make sure it's not a broken wire or damaged connector?

It's the MAF sensor not the MAP sensor, they are 2 different things.

Unplug the plug, use a multimeter to check you have voltage on one of the pins. When you find that pin, try moving the wiring around and checking if the voltage disappears in a certain position. Use thin probes and don't push them into the connector, or you may spread the pins open too far, just rest the probes against them. If you're unsure then maybe just best to take it to a garage.

This video may help you.

Friend, I did the tests, with the ignition on and then with the car started, these are the data...There is no big difference in data between the ignition and the car started…

Pin 1 : 5.02

Pin2 : 00.03

Pin 3 : 00.62

 

[mty12345]

The data looks good.

The fault code was set because at some point the 5 volts on pin 1 was not there. If you look at the freeze frame data on your fault code, you can see that the code was set when the engine was hot (89C) When things get hot they expand and it's possible that the fault only shows up when the plug or wiring is hot.

New connectors are not expensive, if it was my car I would try replacing the connector and the wiring with a new one. Try to buy one that is high quality. They are 'Mass air flow harness repair kits' or sometimes called 'MAF pigtails' in english.

You will have to find the right one for your car, but something similar to this example below:

New Mass Air Flow Meter Repair Harness For Most Bosch Mass Air Flow Sensors MAF | eBay

Mass Air Flow Meter Repair Harness Fits Most Bosch Mass Air Flow Sensors MAF . Most Bosch Mass Air Flow Sensors MAF . This part is manufactured to OE specifications and is offered with a 5 year warranty. If your part goes faulty at any point within 5 years of the purchase date. Cross Reference...

www.ebay.co.uk

If you can use a soldering iron then you can do it youself fairly easily. If not then a garage/workshop should be able to fit it in less than 1 hour for you.

 

[jccorredor96]

I found the problem... a ****** fuse... the only thing I didn't look at from the beginning