Technical rev counter fluctuates

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Technical rev counter fluctuates

Joined
Oct 5, 2010
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Wigton Cumbria
hi all having a odd issue with the 1.2 cinq

driving along the rev counter will fluctuate from say 4k to 2k to back to 3k then to 0k revs its got a slight missfire and the odd poor starting it will turn over and over then thow the injector light on

changed
TB
tps
maf
map
water temp sensor
crank sensor
ecu to another mcrich chipped ecu

realy got me stumped going to change fuel pump next

no vac leak that i can find
 
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