Could this be a boost leak ?

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Bizzy55
Posts: 7
Joined: 19 Jul 2025, 10:28

Could this be a boost leak ?

Unread post by Bizzy55 »

2013 1.6 HDI Partner

SYMPTOMS
  • Occasionally cold engine will not start on first ignition. Engine light comes on. Wait 30 seconds and it starts.
  • Occasional pulsing loss of power - sometimes when going up hills.
I read someone on the forum reporting a similar loss of power on hills being caused by a boost leak. Could it also explain faulty starting ?
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RichardW
Forum Treasurer
Posts: 12445
Joined: 07 Aug 2002, 17:12
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Re: Could this be a boost leak ?

Unread post by RichardW »

Unlikely, no boost at cranking speed! Sounds more like the EGR valve to me.
Richard W
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Bizzy55
Posts: 7
Joined: 19 Jul 2025, 10:28

Re: Could this be a boost leak ?

Unread post by Bizzy55 »

RichardW wrote: 14 Sep 2025, 12:08 Unlikely, no boost at cranking speed! Sounds more like the EGR valve to me.
Thanks OBD fault codes don't mention the EGR valve. Most recently I am getting :

P0100 - MAF sensor
P0001
P0003 - both fuel volume regulator
P0245 - Turbocharger wastegate valve
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RichardW
Forum Treasurer
Posts: 12445
Joined: 07 Aug 2002, 17:12
x 1431

Re: Could this be a boost leak ?

Unread post by RichardW »

They all look like circuit faults - what are you reading it with? Suggestive of something pulling the 5v reference down, but I'd be surprised if they are permanent, as otherwise it wouldn't run at all! Really you need to get it on something that can read live data and have a look at crank signal and fuel pressure while it's being cranked. I would also look to see if the EGR valve is tightly following the requested position once it's running.
Richard W
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