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faulty ignition

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16 Jul 2021 15:44 #50044 by Fino
faulty ignition was created by Fino
hello I am Fino from Mauritius, very glad to make part of your group.
 I like very much diy.in various fields.
 Having difficulties to close the doors of my VW Bora 2000 (1399cc petrol engine nu ahw302414),  I decided to open the panel of the driver's door. Having found nothing suspect.  After this operation, the car start and shut down after one or two seconds.
I  have good sparks,  injectors clean, pump  ok.  
I have no wiring diagrams, can anyone helps me in the following step to take.
 Hoping to hear  soon good advice,  thanks a lot in advance

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19 Jul 2021 02:37 - 19 Jul 2021 02:38 #50099 by juergen.scholl
Replied by juergen.scholl on topic faulty ignition
Fino,

when the car shuts down after a couple of seconds this may be an immobilizer issue. Does the key symbol in the dash go out when you open the switch or does it stay on. Do you have a second key (programmed) you can try to start the car?

An expert is someone who knows each time more on each time less, until he finally knows absolutely everything about absolutely nothing.
Last edit: 19 Jul 2021 02:38 by juergen.scholl.
The following user(s) said Thank You: Noah

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20 Jul 2021 15:28 #50107 by Fino
Replied by Fino on topic faulty ignition
Hye thanks you very much for your reply
I have only one key .
The key symbol stay on when switch is on ,
A private key manufactuer put it on test and told that the key is ok .
In this case shall i do the five volts check ?
If yes the switch must be on or off ?
thank you very much for my first reply .

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20 Jul 2021 20:36 - 20 Jul 2021 20:37 #50108 by juergen.scholl
Replied by juergen.scholl on topic faulty ignition
When the key symbol stays on thhen the key is NOT recognized and there is no start permisson!

The key may be good but the antenna could be bad, a wire might be broken.......there are many possibilities.
With a capable scanner -VCDS, Launch, Autel etc, you can enter address 17 - instrument cluster. The immobilizer is part of the cluster and MVB 21 to 24 will show you information on this system.

If you´re not familiar with immobilizers and how they work it may be easier to contact a locksmith. On this car it is easy to erase the immobilizer, manipulating the ecm.

An expert is someone who knows each time more on each time less, until he finally knows absolutely everything about absolutely nothing.
Last edit: 20 Jul 2021 20:37 by juergen.scholl.
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21 Jul 2021 22:01 #50117 by Fino
Replied by Fino on topic faulty ignition
Good morning thanks for your reply .
In the mean time waiting for the vcds , how can i test if the antenna is functionning?
Also where can i get a wiring diagram ?,
On two sensor the 5 volts is missing ,
Thank you very much for very precious advice ,

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22 Jul 2021 02:27 #50118 by chief eaglebear
Replied by chief eaglebear on topic faulty ignition
hi fino whats your fuel pressure

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22 Jul 2021 16:41 #50124 by Fino
Replied by Fino on topic faulty ignition
Hi good evening thanks for your reply .
I have no instrument for measuring the fuel pressure but i can hear the pump switch on
I also already clean the injectors .
Thank you very much hoping to hear from you soon .

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