Starting issues

[Jod T5]

Originally Posted by coldfield

Jod, my engine was turning over but would not start, somtimes it did start ,but for only a split second, then it would die on me.

This was my understanding of how it operated, ie car starts normally but cuts out just after starting....

Jod

[grass hopper]

Originally Posted by Jod T5

Incidentally how does the immob/antenna ring effect this model...
If there total cranking cut...
Does it just crank and crank..
Does the engine fire for a moment or two and then cut out?...

Jod

Hi,got this thread mixed up with another (toplights941) i should read from the begining,the antena ring if faulty allows cranking but cuts the fuel/spark,can fire for a split second then die.

[Jod T5]

Originally Posted by grass hopper

Hi,got this thread mixed up with another (toplights941) i should read from the begining,the antena ring if faulty allows cranking but cuts the fuel/spark,can fire for a split second then die.

Is there no definite answer tho, having never had this issue i would be keen to know whether by design the car starts and then cuts out or if the fuel and spark are cut as there is no communication between the key and ring as soon as the car is cranked thus stopping the car from starting at all...

Maybe it works on a time basis, ie if there is no continual communication for X time the fuel and spark are cut. This may explain why with a ring issue sometimes the cars start albeit momentarily....??

Jod

[Toplights]

Good afternoon to you all,Dont know if my explinations where a bit vague,at the present time I think my problem is spark (electrics) related.I have proved i have fuel at the fuel rail and its under pressure,so i assume thats ok.
I have replaced Coil (2nd hand).
Cleaned all electrical plugs i can find including the one on top of the gearbox.
Cleaned all the earthing points i could find.
Taken out the two ECU units in the engine bay checked them for signs of water or corrosion,all ok.
I have no issues with lights, indicators,horns,the alarm system works as it should.
Its as if the car thinks everythings ok as there are no fault codes being logged.
Its as if it thinks i'm trying to nick it,the more i think of it the more it points to an Imobiliser problem.
I have a cps on the way will try that,then go for the imobiliser ring,if that doesent work she could be off to the Volvo grave yuard in the sky.I hope not cause up to now its been the best car i have ever had.

[grass hopper]

Originally Posted by Jod T5

Is there no definite answer tho, having never had this issue i would be keen to know whether by design the car starts and then cuts out or if the fuel and spark are cut as there is no communication between the key and ring as soon as the car is cranked thus stopping the car from starting at all...

Maybe it works on a time basis, ie if there is no continual communication for X time the fuel and spark are cut. This may explain why with a ring issue sometimes the cars start albeit momentarily....??

Jod

changed approx 10 over the years,one was for non start,but usually the customer says the car wont fire intermitantly,usually a fault code is stored,ie no comunication from key to imobiliser module,not sure what starts to fail in the antenna ring,probably loses the plot due to old age like me but its not on a timer,just guess the signal dont get there now and then.also 2 ignition keys close by and cars parked in airport car parks (due to the radar) can cause interference with the signal from key to antenna ring.