Power steering issue

James93

Member
Hoping someone can help/had a similar issue. My problems started about 2 weeks ago when the car failed to start round at the corner shop. I replaced the battery the next day, fired up fine and drove it round the corner back home. The next day it wouldn’t start again so I called the AA a few days later, the car then fired up fine and the bloke reckoned I’d flooded it when it wouldn’t start before (apparently in an injection car). He said to let the engine warm up properly when I start it otherwise I risk flooding it. Anyway a few days later I park it at my parents, have too much to drink and leave it there. Mum moves it on the drive (letting a cold engine run for only a few seconds). I pick it up the next day and drive it home but the day after that it doesn’t start again (I’m thinking because my mum started it up briefly). I call the AA out again and this time they can’t start it and the bloke reckoned it was the fuel pump. I’ve booked it in with my mechanic but in the meantime I’ve been able to start the car every time and on 3 occasions I’ve taken it out for a long run just hoping it would sort itself out. Yesterday after a long run I take it the petrol station and after filling up the power steering warning light is on (only the one steering light). I drove it home with no power steering and turned it off and on but the issue remains. Just explaining all of that in case the someone thinks the issue could be linked in some way. Thanks in advance.
 
There is only one power steering light on the dash. I’ve had the power steering fail on a previous Z4 but none of the starting issues you’ve had.

Sometimes a low battery can cause it but you’ve changed it. Maybe check the voltage on the new one .

The first thing worth checking is the fuses. You also try turning the steering wheel lock to lock.

Mind needed the eps motor fixing and was sent to ecutesting who repaired it.
 
I cannot see how these are related tbh.
I've also never heard of flooding these cars on start up.

I reckon the faults are unrelated and it sounds as though you need to get your EPS motor fixed as already suggested.
I've done a few of these now and it's pretty straightforward once you know how.
A dealer will want to fit a whole new rack and that'll set you back well over £2k.
For me now it's around two hours total work time and £295 for the repair. You get your own motor back so the car has to sit for a few days.
But ECU Testing usually turn them around in 48 hours or so.

Depending where you are, I'm happy to help.
 
In 2016 this happened to my car. BMW wanted £2500 for a new column. Very different now thankfully. https://www.ebay.co.uk/itm/394485388672?var=0&mkevt=1&mkcid=1&mkrid=710-53481-19255-0&campid=5338268676&toolid=10044&_trkparms=ispr=1&amdata=enc:1umhpFOimRwGgl9TOi4egvw91&customid=e08bb6a1-eec9-4339-bea0-8cfccdabb397
 
raymond.harper said:
In 2016 this happened to my car. BMW wanted £2500 for a new column. Very different now thankfully. https://www.ebay.co.uk/itm/394485388672?var=0&mkevt=1&mkcid=1&mkrid=710-53481-19255-0&campid=5338268676&toolid=10044&_trkparms=ispr=1&amdata=enc:1umhpFOimRwGgl9TOi4egvw91&customid=e08bb6a1-eec9-4339-bea0-8cfccdabb397

Not seen that one before, but I suspect they are all much the same.

For reference, the ECU Testing one I always use is: https://www.ebay.co.uk/itm/401352168863
 
Several separate issues. Fuel injected engines don't flood but, if started and stopped within, say, a minute bore wash can be engendered. The oil gets sloshed off the rings and, next time round, there's no compression for a while. So driving to the shops will be far enough to let things settle and, for that, I'd say fuel pump, or the fuel pump relay if it has one.

Any which way, for all of these, it needs the codes reading or it's guesswork.
 
smorris_12 said:
Several separate issues. Fuel injected engines don't flood but, if started and stopped within, say, a minute bore wash can be engendered. The oil gets sloshed off the rings and, next time round, there's no compression for a while. So driving to the shops will be far enough to let things settle and, for that, I'd say fuel pump, or the fuel pump relay if it has one.

Any which way, for all of these, it needs the codes reading or it's guesswork.
Agree with all of this except...................... if the EPS motor ECU has failed and there is no Sport button working then you will in all likelihood find that the ECU won't talk to the code reader at all, therefore no faults shown.

So before you dive into the motor refurb you need to check if the sport button works. If it still lights up with the steering failed then you could be looking at a steering angle sensor issue.
 
As above, when my eps failed, my code reader could not communicate and stated to that effect and my sports button was stuck permanently on (better than off :D )
 
enuff_zed said:
smorris_12 said:
Several separate issues. Fuel injected engines don't flood but, if started and stopped within, say, a minute bore wash can be engendered. The oil gets sloshed off the rings and, next time round, there's no compression for a while. So driving to the shops will be far enough to let things settle and, for that, I'd say fuel pump, or the fuel pump relay if it has one.

Any which way, for all of these, it needs the codes reading or it's guesswork.
Agree with all of this except...................... if the EPS motor ECU has failed and there is no Sport button working then you will in all likelihood find that the ECU won't talk to the code reader at all, therefore no faults shown.

So before you dive into the motor refurb you need to check if the sport button works. If it still lights up with the steering failed then you could be looking at a steering angle sensor issue.

Thanks for that, when I drive it to the garage on Wednesday I’ll check the sport button but don’t want to start it up before than just in case I jinx it. Funny you say about the sport button because I never use it and I happened to be in sport mode before the steering went, so thinking it could’ve been some kind of change in stiffness of steering that caused something to break. About the ECU motor, guessing you have to remove that yourself and requires taking the column out? I’m in Southend, Essex by the way
 
enuff_zed said:
smorris_12 said:
Several separate issues. Fuel injected engines don't flood but, if started and stopped within, say, a minute bore wash can be engendered. The oil gets sloshed off the rings and, next time round, there's no compression for a while. So driving to the shops will be far enough to let things settle and, for that, I'd say fuel pump, or the fuel pump relay if it has one.

Any which way, for all of these, it needs the codes reading or it's guesswork.
Agree with all of this except...................... if the EPS motor ECU has failed and there is no Sport button working then you will in all likelihood find that the ECU won't talk to the code reader at all, therefore no faults shown.

So before you dive into the motor refurb you need to check if the sport button works. If it still lights up with the steering failed then you could be looking at a steering angle sensor issue.

Thanks for that, when I drive it to the garage on Wednesday I’ll check the sport button but don’t want to start it up before than just in case I jinx it. Funny you say about the sport button because I never use it and I happened to be in sport mode before the steering went, so thinking it could’ve been some kind of change in stiffness of steering that caused something to break. About the ECU motor, guessing you have to remove that yourself and requires taking the column out? I’m in Southend, Essex by the way
 
[ref]James93[/ref], you don’t need to remove any part of the column. I take the seat and steering wheel out as I’m too old to fit into the footwell.
Then it’s lower column shroud and footwell panel out.
You can then remove the motor without disturbing anything else.
If you pm me your number I can talk you through it.
Or check the distance from me to you. If you’re happy to cover my fuel costs I’ll do it for you but would need two trips and the car is immobilised in the meantime.
 
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