Help engine still runs after I take key out of ignition

Bdwarb1 · Dec 4, 2018

Hi
I have a another Puma problem! When I take the key out of the ignition the engine still runs until I put my foot in the break......has the ignition switch changed last week and it’s done it again! Any ideas please????

My Old Landy · Dec 4, 2018

Would that not be the fuel solenoid? I am not familiar with the newer engines but I believe all diesels will run on without a fuel shut off as no ignition is required....

Earl · Dec 4, 2018

How funny, I found this out by accident myself just the other week. Started the car then took keys out as i had forgotten the pedal lock.... still running! Thought it was a bit odd!!

The Mad Hat Man · Dec 4, 2018

fuel solenoid or running on own oil.

keep a co2 extinguisher to hand

Earl · Dec 4, 2018

The Mad Hat Man said:
fuel solenoid or running on own oil.

keep a co2 extinguisher to hand

Running on own oil? not sure what you mean. Right - either way it needs sorting - I shall investigate, thanks for narrowing it down.

The Mad Hat Man · Dec 4, 2018

do a you tube search for "engine runaway"

Turboman · Dec 4, 2018

Earl said:
Running on own oil? not sure what you mean. Right - either way it needs sorting - I shall investigate, thanks for narrowing it down.

A compression ignition engine will run on any heavy oil that finds it's way into the cylinders, including it's own engine oil.

My Old Landy · Dec 4, 2018

This might help
https://en.wikipedia.org/wiki/Diesel_engine_runaway

Edit: too slow....

Bdwarb1 · Dec 4, 2018

My Old Landy said:
Would that not be the fuel solenoid? I am not familiar with the newer engines but I believe all diesels will run on without a fuel shut off as no ignition is required....

Hi
Don’t think the Puma has a solenoid - I had someone suggest a wiring problem....perhaps in the break lights

Earl · Dec 4, 2018

oh crap - that sounds serious!? Its only done 72K miles - is this one of those 'dont drive unless you have to' deals? any known causes for this engine?

Earl · Dec 4, 2018

Bdwarb1 said:
Hi
Don’t think the Puma has a solenoid - I had someone suggest a wiring problem....perhaps in the break lights

Thanks, that is helpful. Will take to garage man. Just what i need at the moment!

Turboman · Dec 4, 2018

Earl said:
oh crap - that sounds serious!? Its only done 72K miles - is this one of those 'dont drive unless you have to' deals? any known causes for this engine?

It is usually caused by engine oil entering the intake tract from worn turbo seals, or by overfilling, or by oil getting into the intake tract via breathers.

Bdwarb1 · Dec 4, 2018

Not a runaway either - this is an electrical fault. I have seen loads of people with a similar issue.....runaways are rare.

Earl · Dec 4, 2018

Bdwarb1 said:
Not a runaway either - this is an electrical fault. I have seen loads of people with a similar issue.....runaways are rare.

I have had the EGR valve stick and then fix itself. Had a break light go, but was just a bulb and have replaced it.

Bdwarb1 · Dec 4, 2018

Earl said:
Thanks, that is helpful. Will take to garage man. Just what i need at the moment!

Hi
Let me know what he says....I had mine in and the garage changed the ignition switch. Did it again today! I’m going back anyway as I’m having a problem with the drive belt. So will be asking them to check wiring - someone informed me to check the break wiring.

The Mad Hat Man · Dec 4, 2018

Earl said:
I have had the EGR valve stick and then fix itself. Had a break light go, but was just a bulb and have replaced it.

egr can be disabled thru remap.

Bdwarb1 · Dec 4, 2018

Earl said:
oh crap - that sounds serious!? Its only done 72K miles - is this one of those 'dont drive unless you have to' deals? any known causes for this engine?

My defender has done 67000. It seems a common problem but it’s different wiring issues. Some scary comments on here! I am driving still. A runaway does not need the ignition and it’s not about the electrics but other problems.....also rare! It’s easy to scare.

Wimblowdriver · Dec 4, 2018

The brake pedal has two switches, one for the brake light and one connected to the ECM. Not sure what the one connected to the ECM does, but half recollect that it reduces engine power when the brakes are applied (as said, not sure). I suspect this switch is faulty enabling the engine to run on until the brake pedal is pushed. Its a possibility.

The Mad Hat Man · Dec 4, 2018

Bdwarb1 said:
My defender has done 67000. It seems a common problem but it’s different wiring issues. Some scary comments on here! I am driving still. A runaway does not need the ignition and it’s not about the electrics but other problems.....also rare! It’s easy to scare.

not scaring - just making aware.

Bdwarb1 · Dec 4, 2018

Wimblowdriver said:
The brake pedal has two switches, one for the brake light and one connected to the ECM. Not sure what the one connected to the ECM does, but half recollect that it reduces engine power when the brakes are applied (as said, not sure). I suspect this switch is faulty enabling the engine to run on until the brake pedal is pushed. Its a possibility.

Cheers sounds sensible
What are You thoughts about the runaway comments?

Help engine still runs after I take key out of ignition

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