Missfire tickover lumpy (hunting)

2003 Citroen Berlingo 1.4 petrol / lpg van
Car: Citroen Berlingo
Year: 2003
Variant: 1.4 petrol / lpg van
Categories: Running Rough, Starting & Power Loss
when running on petrol .missfire on tickover hunts .had other coil pack ftd.when vacume pipe at far left of inlet manfold is taken off it starts to run fine .if vacume pipe on rocker cover or air intake is removed it makes no diff think might not be getting corect mixture ,seems when it gets more air in vacume hole is runs smooth .runs great on motorway with gas or petrol .driveing me nuts ,whats my fix ,cheers jack
Problem added: Apr 15, 2011 (12 years ago)
Not really familar with that vehicle , but could be engine coolant temp sensor sending wrong info to ECU ?
Answered Apr 15, 2011 (12 years ago)
Ye was thinking ecu might be getn wrong sig ,but where to start did try plug in comp but only read missfire will try new temp sender tmrw .Cheers
Answered Apr 15, 2011 (12 years ago)
could be idle speed control valve blocked so not getting enough air for the amount of fuel going in
Answered Apr 16, 2011 (12 years ago)
Had a bash at a few senders but noth work need to try other ecu unit but will it match the key (does it need to? )
Answered Apr 17, 2011 (12 years ago)

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