Non starting issue(sometimes)
Discussion
As the title sometimes it refuses to turn over.Immobiliser works ,it primes but starter motor remains dead.Now with frantic on and off with the wiper stalk ignition on and off results in the car starting.I've been told by an Vauxhall engineer that the cavalier had a similar story which seemed to link the earth of the wipers with the starter system.Anyone else had this problem,is it the barrel or anything else as I may have to take it to david gerald to sort.
Any help greatly appreciated
Cheers
P
Any help greatly appreciated
Cheers
P
Edited by jvr on Monday 8th November 20:42
jvr said:
As the title sometimes it refuses to turn over.Immobiliser works ,it primes but starter motor.Now with frantic on and off with the wiper stalk ignition on and off results in the car starting.I've been told by an Vauxhall engineer that the cavalier had a similar story which seemed to link the earth of the wipers with the starter system.Anyone else had this problem,is it the barrel or anything else as I may have to take it to david gerald to sort.
Any help greatly appreciated
Cheers
P
One other thing to try is, while the key is in the start position, to slap the underside of the passenger dash. The immobilise is in there and it has relays to enable/disable the fuel pump and the starter motor. The starter motor relay is not really up to spec and can fail. Slapping the dash usually jolts the relay into closing allowing the starter motor to do its thing.Any help greatly appreciated
Cheers
P
If this does reliably work the the next step is to visit Carl at http://www.tvruk.tv/
He replaced my immobiliser when it failed.
My advise is don't guess, to be honest it could be many things.
If you let this post run long enough you will get a list of components as long as your arm.
With this and any other electrical fault for that matter, finding the fault is about being systematic.
The difference between a good mechanic / auto electrician and a bad one is really just down to his diagnostic skills.
You could just guess and replace components until the problem goes away or you could buy a decent meter and do the job properly.
Start by using your meter to test the ignition switch itself and then follow your way to the starter checking all components and connections in the chain.
This way you will find the fault quicker and replace the correct problem component first time.
Doing it any other way will just be guess work.
Good luck and let us all know how you get on.
If you let this post run long enough you will get a list of components as long as your arm.
With this and any other electrical fault for that matter, finding the fault is about being systematic.
The difference between a good mechanic / auto electrician and a bad one is really just down to his diagnostic skills.
You could just guess and replace components until the problem goes away or you could buy a decent meter and do the job properly.
Start by using your meter to test the ignition switch itself and then follow your way to the starter checking all components and connections in the chain.
This way you will find the fault quicker and replace the correct problem component first time.
Doing it any other way will just be guess work.
Good luck and let us all know how you get on.
Well the immobiliser does seem to work because the pump primes,I spoke to david Gerald TVR today and he hadn't come across it before but said the wiper action could be a red herring and to try another switch when it happens again.The trouble is that problem arises just now and again so its not possible to identify the problem when its working.The most likely cause could be a bad earth possibly from the ignition area.
P
P
jvr said:
Well the immobiliser does seem to work because the pump primes,I spoke to david Gerald TVR today and he hadn't come across it before but said the wiper action could be a red herring and to try another switch when it happens again.The trouble is that problem arises just now and again so its not possible to identify the problem when its working.The most likely cause could be a bad earth possibly from the ignition area.
P
The ignition switch is a known weakness, the contacts wear.P
Just a Vauxhall part so it should be cheap.
jvr said:
Well the immobiliser does seem to work because the pump primes,I spoke to david Gerald TVR today and he hadn't come across it before but said the wiper action could be a red herring and to try another switch when it happens again.The trouble is that problem arises just now and again so its not possible to identify the problem when its working.The most likely cause could be a bad earth possibly from the ignition area.
P
As others have said this could be numerous things.and could become expensive to change this, change that etc. First no cost option, clean and check all the earth points, well worth a try.P
TJC46 said:
jvr said:
Well the immobiliser does seem to work because the pump primes,I spoke to david Gerald TVR today and he hadn't come across it before but said the wiper action could be a red herring and to try another switch when it happens again.The trouble is that problem arises just now and again so its not possible to identify the problem when its working.The most likely cause could be a bad earth possibly from the ignition area.
P
As others have said this could be numerous things.and could become expensive to change this, change that etc. First no cost option, clean and check all the earth points, well worth a try.P
P
jvr said:
Well the immobiliser does seem to work because the pump primes,
The immobiliser has separate relays for the fuel pump and the starter motor. On my immobiliser the fuel pump always worked. It was just the starter motor replay that failed. So the immobiliser could still be faulty.bsdnazz said:
jvr said:
Well the immobiliser does seem to work because the pump primes,
The immobiliser has separate relays for the fuel pump and the starter motor. On my immobiliser the fuel pump always worked. It was just the starter motor replay that failed. So the immobiliser could still be faulty.P
jvr said:
bsdnazz said:
jvr said:
Well the immobiliser does seem to work because the pump primes,
The immobiliser has separate relays for the fuel pump and the starter motor. On my immobiliser the fuel pump always worked. It was just the starter motor replay that failed. So the immobiliser could still be faulty.P
I ended up replacing the immobiliser and the starting problem went away.
Caveat - accurate diagnosis is important otherwise you can end up replacing a lot of things and still not fix the problem.
bsdnazz said:
jvr said:
bsdnazz said:
jvr said:
Well the immobiliser does seem to work because the pump primes,
The immobiliser has separate relays for the fuel pump and the starter motor. On my immobiliser the fuel pump always worked. It was just the starter motor replay that failed. So the immobiliser could still be faulty.P
I ended up replacing the immobiliser and the starting problem went away.
Hmmm another thing to try.
P
Caveat - accurate diagnosis is important otherwise you can end up replacing a lot of things and still not fix the problem.
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