Peugeot 607 slow to start

Could check any relevant fuses , check battery is correct CCA . Also check all earths ,especially from engine / power unit to body . Check starter motor draw .


Fuse Layout Peugeot 607 2000-2010
2005, 2006


Dashboard Fuse box
Instrument panel fuse box diagram: Peugeot 607 (2005, 2006)

Assignment of the fuses in the Dashboard Fuse box (2005, 2006)
N° Rating Functions
F1 15 A Front wash-wipe pump and wash-wipe fluid level sensor.
F2 30 A Locking and deadlocking earth.
F3 5 A Air bags.
F4 10 A Clutch switch, brake dual-function switch, diagnostic connector, ESP sensor, air bags and pre-tensioners unit, air conditioning BCP3 relay, electrochromatic mirror.
F5 30 A Front electric windows and sunroof supply.
F6 30 A Rear electric windows supply.
F7 5 A Glove box switch, courtesy lights, map reading lights, courtesy mirrors.
F8 20 A Multifunction display supply, steering wheel control, alarm siren, trailer fusebox supply.
F9 30 A Front and rear lighters (100 W max.)..
F10 15 A Additive reservoir control unit supply.
F11 15 A Automatic gearbox control unit automatic gearbox positions selection switch, ignition switch.
F12 15 A Trailer fusebox supply, hands-free kit, seats relay, seat memory unit, rain and brightness sensor.
F13 5 A Engine fusebox supply, headlamp adjustment supply.
F14 15 A Parking assistance control unit supply, headlamp adjustment switch, instrument panel, air conditioning, air bags and pre-tensioners unit.
F15 30 A Locking and deadlocking supply.
F17 40 A Heated rear screen and heated mirrors.
F31 5 A Right-hand brake light.
F32 5 A Left-hand brake light.
F33 5 A Third brake light.
F34 5 A Audio/telephone supply.
F35 5 A Tyre under-inflation detection control unit, CD changer.
F36 30 A Passenger seat relay.
F37 30 A Passenger and rear right heated seats.
F38 30 A Driver’s and rear left heated seats.
F39 30 A Driver’s seat relay.
F40 5 A Diagnostics socket.
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Engine compartment
Under-hood fuse box diagram: Peugeot 607 (2005, 2006)

Assignment of the fuses in the engine compartment (2005, 2006)
N° Rating Functions
F1 20 A Fan assembly relay control, additional fan assembly (2.7 litre V6 HDI 24V), engine control unit power relay.
F2 15 A Horn.
F3 10 A Front and rear wash-wipe.
F4 20 A Headlamp wash.
F5 15 A Fuel pump and purge canister solenoid valve.
F6 10 A Power steering, suspension control unit, automatic gearbox.
F7 10 A Engine control unit, ESP control unit.
F8 15 A Starter coil.
F9 10 A Level sensor, passenger compartment heating (HDI), STOP switch.
F10 30 A Engine management actuators (ignition coil, solenoid valves, oxygen sensors, control units, injectors).
F11 40 A Air conditioning blower relay.
F12 30 A Windscreen wipers relay.
F13 40 A Built-in system interface supply (ignition positive).
F14 30 A Air pump (petrol).

Could also try some injector cleaner additive .