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-   -   strange hesitation !!! MG ZT 1.8T (https://www.the75andztclub.co.uk/forum/showthread.php?t=321152)

tony g 30th September 2022 18:21

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 :shrug:

FLYING BANANA 30th September 2022 18:53

My 1.8t had the same issue. Changed the coil packs, checked the plug gaps. Been ok since.

stevestrat 30th September 2022 19:17

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.

tony g 30th September 2022 20:00

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 ;)

gnu 1st October 2022 16:59

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.

tony g 1st October 2022 18:45

Quote:

Originally Posted by gnu (Post 2947323)
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. ;)

tony g 9th October 2022 13:02

well I got round to replacing the 2 coil packs and leads yesterday when it stopped raining :o and its made no difference what so ever :mad: still think its something to do with the turbo :shrug:

Yorkshire GOC 9th October 2022 15:41

Have a read here - symptoms could be Turbo over boosting .

https://the75andztclub.co.uk/forum/s...d.php?t=272997

T-Cut 9th October 2022 16:56

Do you have the FOC fitted? I mean the Fabled Orange Clip. If not get one fitted asap.
TC

tony g 9th October 2022 20:20

Quote:

Originally Posted by Yorkshire GOC (Post 2948079)
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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