Not starting since engine swap
2008 Peugeot 308 1.6hdi

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Jon
Driver
1 points

Problem added: Oct 6, 2020 (8 months ago)
Swapped a blown engine out. Did the usual servicing, all ok. Scanner reports no fuel pressure. Changed the fuel pressure sensor, still no fuel pressure. cracked the pipe at an injector and plenty of pressure. Engine won't start.

Car details
Car: Peugeot 308
Variant: 1.6hdi
Model Year: 2008
Category: Engine & Drivetrain
Electrics, ECU, Warnings & Lights
Replies and Fixes
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bustedknuckles
Legend
2,304 points

Oct 6, 2020 (8 months ago)
Possible faulty injector ?or is filter restricting the flow or is pipe work correct feed and return?
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whittingehame
Legend
19,293 points

Oct 6, 2020 (8 months ago)
Crack ALL the pipes to bleed / check supply ok?
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Jon
Driver
1 points

Oct 6, 2020 (8 months ago)
Replying to post by bustedknuckles:
Possible faulty injector ?or is filter restricting the flow or is pipe work correct feed and return?
New fuel filter fitted. 1 faulty injector I could understand but not all 4. Engine was out of a runner.
It's as if the ECU doesn't see the fuel pressure in the rail and therefore doesn't open the injectors.
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Jon
Driver
1 points

Oct 6, 2020 (8 months ago)
Replying to post by whittingehame:
Crack ALL the pipes to bleed / check supply ok?
Supply is ok. Cracked all the injector pipes. Common rail engine so cracking 1 means I have to build the pressure again before the next.
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bustedknuckles
Legend
2,304 points

Oct 6, 2020 (8 months ago)
Possibly then fuel pressure regulator or sensor not plugged in or plug not fully home ,causing insufficient pressure in rail and if one injectors faulty causing fuel to be lost return spill,or maybe pump not producing sufficient pressure ,would be looking at fuel pressure readings first
Avatar
Jon
Driver
1 points

Oct 6, 2020 (8 months ago)
Replying to post by bustedknuckles:
Possibly then fuel pressure regulator or sensor not plugged in or plug not fully home ,causing insufficient pressure in rail and if one injectors faulty causing fuel to be lost return spill,or maybe pump not producing sufficient pressure ,would be looking at fuel pressure readings first
Live data showed zero fuel pressure. We changed the sensor and it still shows zero pressure at rail when we know there is pressure (fuel spurts when injector pipe is cracked)
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bustedknuckles
Legend
2,304 points

Oct 7, 2020 (8 months ago)
You probably just have residual pressure ,not enough for fine spray ,so you need to work out if the pumps working correctly ,was it timed /pinned up with timing ,as there’s a critical point of operation or is it the pressure regulator that’s faulty and telling the ecm false information,then there’s the pressure regulator is it plugged in reading ok.please update with findings
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paulieone
Legend
1,786 points

Oct 7, 2020 (8 months ago)
Did you get just a bare engine and swapped over all ancillaries and wiring etc.
Not good practice cracking pipes off....over 250 bar of pressure required in rail for starting!!
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Peugeotowner
Driver
15 points

Jan 11, 2021 (5 months ago)
its possible your ecu does not recognise your engine set up in such a case it wont start your engine
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whittingehame
Legend
19,293 points

Jan 11, 2021 (5 months ago)
Probably got it fixed by now whatever the fault was as the post is over 3 months old
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Jon
Driver
1 points

Jan 11, 2021 (5 months ago)
Problem turned out to be massive airlock caused by a faulty new fuel filter (it had a hole)
Sent it to a mate in the trade, he put a high pressure sender pump temporarily in from a VW. Fired right up. New fuel filter and a good bleed up and touch wood it's running great.
Thanks for all your help.
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whittingehame
Legend
19,293 points

Jan 11, 2021 (5 months ago)
Thanks for updating the forum . Good you got it fixed
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