Flat spot 3000 revs no warning lights

1999 Ford Fiesta 12.5 zetec
Car: Ford Fiesta
Year: 1999
Variant: 12.5 zetec
Categories: Running Rough, Starting & Power Loss
no fault codes on snap on machine,changed plugs,leads,coilpack,fuel filter,maf sensor,accelerator sensor.starts ok runs ok until 3000 revs under load can drive though by dropping down gear and accelerating HELP
Problem added: Nov 21, 2011 (12 years ago)
Check all vacuum pipes are secure and not cracked or perished...
Answered Nov 21, 2011 (12 years ago)

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