Cutting out

Wayne B · 19th January 2024, 19:25

Hi , I have now got a problem with the MG diesel cutting out whilst driving down the road. I think there must be a problem in the relay box under the bonnet because once the car has cut out, I can put my hand under the relay box & push the wires upwards & the car will restart again. If i do not push them up the car will not start. I can sometimes fiddle with relay that feeds the ECU & again, it will start. Anybody have any ideas on solving this issue? is there a corrosion issue in the wiring connectors perhaps?

Regards,

Wayne.

BigRuss · 19th January 2024, 20:16

It is not that uncommon, best thing to do is to undo the underbonnet fuse box ( 1x10 mm bolt and two screws after disconnecting the battery).

Remove the plastic shroud below the fusebox that surrounds the wiring by unclipping it at the front.
Tilt the fusebox over towards the drivers side, then starting at the top disconnect the connectors by pressing the retaining tabs.

Work your way down until all the connectors have been unclipped, then starting at the bottom connect and disconnect each one a couple of times. This should clean up the contacts.
Don't worry the connectors are keyed so will only fit in their designated places

Refit the plastic shroud then reattach the fusebox with the bolt and screws. Reconnect the battery and all should hopefully be ok.

Russ

Wayne B · 19th January 2024, 20:22

Thank you.

I will try this after the weekend as working nights at the moment. I will try to remember to post an update a little while after doing the job just to make sure it works before I reply.

Regards,

Wayne.

Wayne B · 24th January 2024, 13:01

I did as Russ suggested the following day & the car hasn't cut out since. Thank you Russ, for the advice.

Regards,

Wayne.

another_clean_sheet · 24th January 2024, 16:27

Quote:

Originally Posted by Wayne B

I did as Russ suggested the following day & the car hasn't cut out since. Thank you Russ, for the advice.

Regards,

Wayne.

Big Russ sorted me out with the same problem a few years back.

BigRuss · 24th January 2024, 20:40

Quote:

Originally Posted by Wayne B

I did as Russ suggested the following day & the car hasn't cut out since. Thank you Russ, for the advice.

Regards,

Wayne.

Thanks Wayne, you're welcome.
Glad it's now sorted.

Russ

19th January 2024, 19:25	#1
Wayne B Loves to post MGZT Join Date: Oct 2011 Location: Havant Posts: 312 Thanks: 10 Thanked 2 Times in 2 Posts	Cutting out Hi , I have now got a problem with the MG diesel cutting out whilst driving down the road. I think there must be a problem in the relay box under the bonnet because once the car has cut out, I can put my hand under the relay box & push the wires upwards & the car will restart again. If i do not push them up the car will not start. I can sometimes fiddle with relay that feeds the ECU & again, it will start. Anybody have any ideas on solving this issue? is there a corrosion issue in the wiring connectors perhaps? Regards, Wayne. Last edited by Wayne B; 19th January 2024 at 19:27..

19th January 2024, 20:16	#2
BigRuss Premium Trader 75 CDT Tourer,2.5 Launch Saloon, Omipro MG/Rover (T4) Join Date: Jul 2007 Location: Liversedge, West Yorkshire Posts: 5,406 Thanks: 1,105 Thanked 1,340 Times in 661 Posts	It is not that uncommon, best thing to do is to undo the underbonnet fuse box ( 1x10 mm bolt and two screws after disconnecting the battery). Remove the plastic shroud below the fusebox that surrounds the wiring by unclipping it at the front. Tilt the fusebox over towards the drivers side, then starting at the top disconnect the connectors by pressing the retaining tabs. Work your way down until all the connectors have been unclipped, then starting at the bottom connect and disconnect each one a couple of times. This should clean up the contacts. Don't worry the connectors are keyed so will only fit in their designated places Refit the plastic shroud then reattach the fusebox with the bolt and screws. Reconnect the battery and all should hopefully be ok. Russ __________________ Replacement Key Service http://https://the75andztclub.co.uk/...d.php?t=244732 Full T4 Testbook diagnostics available. Diesel ECU repair and replacement. Options enabled or disabled as required. Diesel X-Power 135 and 160bhp, Rover 1.8T 150 to 160 MG 160 V6 to 177 upgrades available P.M. for details.

19th January 2024, 20:22	#3
Wayne B Loves to post MGZT Join Date: Oct 2011 Location: Havant Posts: 312 Thanks: 10 Thanked 2 Times in 2 Posts	Thank you. I will try this after the weekend as working nights at the moment. I will try to remember to post an update a little while after doing the job just to make sure it works before I reply. Regards, Wayne.

24th January 2024, 13:01	#4
Wayne B Loves to post MGZT Join Date: Oct 2011 Location: Havant Posts: 312 Thanks: 10 Thanked 2 Times in 2 Posts	I did as Russ suggested the following day & the car hasn't cut out since. Thank you Russ, for the advice. Regards, Wayne.