Traction control problem - engine not reving

Fred Wurst · 27th August 2021, 06:53

Hello, I have the problem with the traction control lamp being on very often when driving. The engine stalls and its difficult to accelerate over 3000 rpm. Has anyone else had this problem with the ZT-T KV6? I have changed the MAP-sensor just because I had a new one on the shelf, but that didn't help. So I'm starting to think it has something to do with the traction control and air/fuel mixture.

vitesse · 27th August 2021, 07:41

Quote:

Originally Posted by Fred Wurst

Hello, I have the problem with the traction control lamp being on very often when driving. The engine stalls and its difficult to accelerate over 3000 rpm. Has anyone else had this problem with the ZT-T KV6? I have changed the MAP-sensor just because I had a new one on the shelf, but that didn't help. So I'm starting to think it has something to do with the traction control and air/fuel mixture.

In my experience the traction control being on won't cause the engine to either stall or any difficulty in acceleration. Do you have any fault codes?

Regards

Fred Wurst · 27th August 2021, 07:49

Quote:

Originally Posted by vitesse

In my experience the traction control being on won't cause the engine to either stall or any difficulty in acceleration. Do you have any fault codes?

Regards

No fault codes

vitesse · 27th August 2021, 08:01

OK, first thing that comes to mind is fuel pressure. Your car is a 2003 and the fuel filters sometimes unscrew and you loose pressure, do you know if you have a clip on the filter? Have you checked fuel pressure at the rail is approx. 3.5 bar?

Regards

Fred Wurst · 27th August 2021, 08:23

No haven't checked the fuel pressure yet, but I will. Fuel filter was changed earlier this year by previous owner at a shop. I read somewhere else that it could have something to do with the cable that comes from the traction contol to the throttle assy and not letting air in as it should... The problem occures about 8 times out of 10 when driving the car, the 2 times it drives fine.

SD1too · 27th August 2021, 09:19

Quote:

Originally Posted by Fred Wurst

Fuel filter was changed earlier this year by previous owner at a shop.

Ah ha!

Fred; follow vitesse's advice on this. The fuel filter shouldn't have been touched.

Simon

vitesse · 27th August 2021, 09:43

Quote:

Originally Posted by Fred Wurst

No haven't checked the fuel pressure yet, but I will. Fuel filter was changed earlier this year by previous owner at a shop. I read somewhere else that it could have something to do with the cable that comes from the traction contol to the throttle assy and not letting air in as it should... The problem occures about 8 times out of 10 when driving the car, the 2 times it drives fine.

Easy solution: disconnect the cable and make sure the butterfly flap is fully open, but I have changed quite a few traction control motors and never heard of any negative influence on engine performance.

So check the fuel pressure using the Schraeder valve and if below 3.5 bar then suspect the filter.

You might like to know I have a Rover T4 diagnostic computer in Gävle - bit far on this occasion if your car isn't running well, but perhaps good to know if anything else crops-up.

Regards

ps. Swedish 75 group: https://www.facebook.com/groups/1800705170206717

27th August 2021, 06:53	#1
Fred Wurst Newbie MG ZT Join Date: Jul 2021 Location: Ankarsvik, Sweden Posts: 5 Thanks: 0 Thanked 0 Times in 0 Posts	Traction control problem - engine not reving Hello, I have the problem with the traction control lamp being on very often when driving. The engine stalls and its difficult to accelerate over 3000 rpm. Has anyone else had this problem with the ZT-T KV6? I have changed the MAP-sensor just because I had a new one on the shelf, but that didn't help. So I'm starting to think it has something to do with the traction control and air/fuel mixture.

27th August 2021, 08:01	#4
vitesse I really should get out more....... Rover 75 Saloon Join Date: Jul 2011 Location: Gävle Posts: 2,537 Thanks: 395 Thanked 823 Times in 652 Posts	OK, first thing that comes to mind is fuel pressure. Your car is a 2003 and the fuel filters sometimes unscrew and you loose pressure, do you know if you have a clip on the filter? Have you checked fuel pressure at the rail is approx. 3.5 bar? Regards

27th August 2021, 08:23	#5
Fred Wurst Newbie MG ZT Join Date: Jul 2021 Location: Ankarsvik, Sweden Posts: 5 Thanks: 0 Thanked 0 Times in 0 Posts	No haven't checked the fuel pressure yet, but I will. Fuel filter was changed earlier this year by previous owner at a shop. I read somewhere else that it could have something to do with the cable that comes from the traction contol to the throttle assy and not letting air in as it should... The problem occures about 8 times out of 10 when driving the car, the 2 times it drives fine.