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Old 30th September 2022, 18:21   #1
tony g
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Default strange hesitation !!! MG ZT 1.8T

just dropped my daughter off at a party and on the way home on a fast road I put my foot down, rev's got too 3600rpm then nothing for a second, just like you turned the ignition off. but after that second it carried on climbing up the rev range. I slowed down and tried it again and the same thing. on the 3rd attempt it pulled right through but ran out of road to try it a 4th time. I don't think its an electrical misfire but could be turbo ????? anyone had a similar thing
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Old 30th September 2022, 18:53   #2
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My 1.8t had the same issue. Changed the coil packs, checked the plug gaps. Been ok since.
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Old 30th September 2022, 19:17   #3
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Wot Bob said! If the coil packs are past their best you can get a hesitation under "enthusiastic" acceleration. The 1.8T responds best if the plug gap is set to 0.7mm.
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Old 30th September 2022, 20:00   #4
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cheers lads, the plugs are new as the P.O. give the car a service but i'll check em anyway. i was thinking about changing the coil packs just the other day as the idle wonders from 820 to 850 rpm !! I'll get some ordered
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Old 1st October 2022, 16:59   #5
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I agree with the good advice given above. I had similar, some time ago, so renewed the plugs with a reduced gap, cleaned the cam-position sensor and added a dose of Redex, the problem was solved. The plugs I used came out of the box with a 1mm gap; this may have been the main factor.
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Old 1st October 2022, 18:45   #6
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Quote:
Originally Posted by gnu View Post
I agree with the good advice given above. I had similar, some time ago, so renewed the plugs with a reduced gap, cleaned the cam-position sensor and added a dose of Redex, the problem was solved. The plugs I used came out of the box with a 1mm gap; this may have been the main factor.
cheers, ive ordered the coil packs and leads, will check the plug gaps when i fit the coils, i've already checked/cleaned the cam sensor.
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Old 9th October 2022, 13:02   #7
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well I got round to replacing the 2 coil packs and leads yesterday when it stopped raining and its made no difference what so ever still think its something to do with the turbo
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Old 9th October 2022, 15:41   #8
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Have a read here - symptoms could be Turbo over boosting .

https://the75andztclub.co.uk/forum/s...d.php?t=272997
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Old 9th October 2022, 16:56   #9
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Do you have the FOC fitted? I mean the Fabled Orange Clip. If not get one fitted asap.
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Old 9th October 2022, 20:20   #10
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Quote:
Originally Posted by Yorkshire GOC View Post
Have a read here - symptoms could be Turbo over boosting .

https://the75andztclub.co.uk/forum/s...d.php?t=272997
that does sound like my problem
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