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Old 31st May 2020, 17:54   #1
sjc
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MG ZT-T 180 Sports +, 2007 completely restored XJ 4.2 LWB Sovereign,Noble M400,LR Discovery 3

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Default Sold my car to a friend .... typical !!

Having acquired my ZT-T, I offered my ultra reliable 2004/54 75 V6 with 130k miles to one of my very good friends for £650, even included the Navall! I even gave him 28 days to give it back if anything broke such was my confidence in it in true Sodís law fashion,14 days in and for the first time ever the EML light has started flashing !! He said itís a little bit hesitant as well. I was thinking first stop plugs, and go from there ( only got a generic code reader), but heís now mentioned that it started after heíd gone up a kerb stone and parked, so Iím now wondering if he may have knocked the cat or a sensor ?
Any thoughts much appreciated, and if thereís a forum member in the Harlow area that people recommend then please fire away.
Thanks in advance to any contributors
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Old 31st May 2020, 18:51   #2
Ched
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Have a look at the first heat shield, there's a lamda sensor there and he could have caught / chaffed the wiring to it.
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Old 1st June 2020, 02:41   #3
marinabrian
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Quote:
Originally Posted by Ched View Post
Have a look at the first heat shield, there's a lamda sensor there and he could have caught / chaffed the wiring to it.
Good shout Dave

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Old 1st June 2020, 08:42   #4
first-things-first
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If you / they need assistance you have chelmer repair service in Chelmsford, surprisingly or Kevin at Wickford. See the T4 location map for details.
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Old 1st June 2020, 12:59   #5
egremont
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Default Fractured cable insulation

A friendís ZT developed an erratic engine a while ago Ė would accelerate, then slow down to the point he wouldnít allow his wife to drive his car.

I canít claim any credit for the solution as Marinabrian mentioned that the harness may have been damaged Ė cable insulation had fractures that allowed the voltage to vary. His damaged harness gave the ECM false readings that in turn sent various messages to his message centre in his IPK and to other areas.

Obtaining that harness link from Rimmer Bros. fixed the problem.

I am not sure whether that part is still procurable, as Rimmers has deleted most of the harness links from their page. Another reason why I would love to purchase a 75/ZT parts catalogue.
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Old 1st June 2020, 14:13   #6
genpk
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Had a similar issue,the wiring for the o2 sensor, the one just in front of the cat, wrapped around
the drive shaft , ran fine without it connected as the ecu reverts to a default fuel map.
Went to replace the sensor with new one , car would start off fine but all of a sudden the engine became erratic, no acceleration etc.
Turned out that new sensor was faulty.
Was surprised how much the faulty sensor affected the car.
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