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NickP ****
Joined: 07 Jan 2005 Posts: 281 Location: South East
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Posted: Sun Dec 07, 2008 13:06 Post subject: Citroen saxo problem |
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2001 saxo 1100cc mpi. Won't start from cold! Has had,a crank sensor,coolant temp sensor,map sensor,idle control valve/stepper motor,spark plugs,fuel filter and clean fuel. Symptoms: will crank for england but won't fire from cold,no check engine light on,no fault codes present. Will start and ldle if you spray carb cleaner into or cover the inlet so it chokes the engine but if you try and rev it before it's warm it dies! Drives fine when it's warmed up.
Already tried/checked: All of the above components,compression check, fuel pressure,Cam timing,injector cycle,spark at plugs,(getting damp),basically everything that I can think of has been done.
ANY IDEAS/COMMENTS?? |
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Posted: Sun Dec 07, 2008 13:06 Post subject: Google Ads keep this community free to join! |
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markymoan *******
Joined: 25 Jun 2005 Posts: 16267 Location: Naughty Step
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Posted: Sun Dec 07, 2008 13:12 Post subject: |
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I'm no expert but dont they have a cold start system (like a choke) that delivers extra fuel when its cold altering the fuel/air mix ? _________________ |
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NickP ****
Joined: 07 Jan 2005 Posts: 281 Location: South East
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Posted: Sun Dec 07, 2008 13:15 Post subject: |
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markymoan wrote: |
I'm no expert but dont they have a cold start system (like a choke) that delivers extra fuel when its cold altering the fuel/air mix ? |
Nope it's controlled by the ecu that get's it's signal from the coolant temp sensor. |
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markymoan *******
Joined: 25 Jun 2005 Posts: 16267 Location: Naughty Step
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Posted: Sun Dec 07, 2008 13:33 Post subject: |
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That is what I meant, the ecu tells the sytem to deliver more fuel changing the fuel /air mix.
From ucutesting.com
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Fuel Injection engines increase the petrol supply to the injectors for a cold engine
For whatever system if it is suspected that not enough petrol is the cause of the problem then add about a desert spoonfull of petrol down the inlet tract and if starting is then successfull then your suspiscion is confirmed |
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NickP ****
Joined: 07 Jan 2005 Posts: 281 Location: South East
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Posted: Sun Dec 07, 2008 13:52 Post subject: |
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The injector cycle/opening times have been checked |
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eithan h Moderator
Joined: 11 Dec 2005 Posts: 8195 Location: oxfordish
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Posted: Sun Dec 07, 2008 13:56 Post subject: |
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sounds like ecu then |
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NickP ****
Joined: 07 Jan 2005 Posts: 281 Location: South East
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Posted: Mon Dec 08, 2008 18:52 Post subject: |
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SORTED!! It was the coil pack which although giving a spark it obviously wasn't strong enough!! |
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