2005 Citroen Xsara Picasso 1.6 twin cam petrol
Backfiring

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lyron
Driver
10 points

Problem added: Aug 1, 2017 (3 years ago)
been told this could be due to an air leak on the intake manifold. how difficult is it to change said gaskets. or could there be another reason for it.

ron.

Car details
Car: Citroen Xsara Picasso
Variant: 1.6 twin cam petrol
Model Year: 2005
Category: Engine & Drivetrain
Replies and Fixes
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whittingehame
Legend
14,861 points

Aug 1, 2017 (3 years ago)
Could also be caused by timing being out .
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1/4drive
Legend
1,890 points

Aug 2, 2017 (3 years ago)
Or the exhaust manifold!
when leaking it draws fresh air in and the hot exhaust gasses detonate it.
Or excess carbon build up in the combustion chamber.
There's quite a few possible causes.
I'd start with a smoke test of the induction system.
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lyron
Driver
10 points

Aug 2, 2017 (3 years ago)
many thanks for the quick response. new timing belt recently fitted but will re- check
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1/4drive
Legend
1,890 points

Aug 2, 2017 (3 years ago)
Get an exhaust gas check done at your local MOT station and post the results.
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lyron
Driver
10 points

Aug 3, 2017 (3 years ago)
problem now solved. according to the service history ( so called)quick fit auto services did the servicing on it for the past three years. during that time they had done work on intake manifold and exhaust front pipe ,so that rang alarm bells. removed intake manifold .NO GASKETS!!!! just sealant. two 10 mm nuts missing so sorted that mess out and then went to exhaust front pipe / manifold. two studs snapped . so thoroughly enjoyed sorting that out .runs fine now. many thanks for the very sound advice,,,,,ron.
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