Engine continues to run after ignition switches off

[James]

Hi all,


So I’ve recently put my car back on the road - it involved a bit of rewiring to neaten up the MS install I did back in 2010 or so.

After putting it back together the engine continues to run after the ignition key has been switched off - it does this for ten seconds or so and then stops.

If I pull the fuse for the MS the engine stops straight away.

I thought it might be something to do with the fan delay after ignition off - but checked that and switched it off and it still carries on running.

The Brantz trip meter I have installed also continues to be on after I switch off - but with very dim LED digits.

A couple of years away and all the MS knowledge I built up has withered away.

Anyone with any ideas?

James

[grom_e30]

check to see if any thing the ms controls like a fan relay ect has 12v when the key is off

[Matt Cramer]

Something is backfeeding power. Make sure all devices that use 12 volt power (injectors, fuel pump relay, IAC valve, etc) lose power with the key off.

[James]

To answer my own question — it was a voltage regulator fitted backwards that was the issue.

(thanks for the suggestions!)


James