mazda 6 - mazda 6 diesel not starting

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Sat 8 Jan 2011 19:54
mazda 6 - mazda 6 diesel not starting - Gerry26

hi good people.

my dads 2003 mazda 6 was cutting out at idle for a few months then 1 day it wouldnt start. after some research and recommendations i replaced the scv unit on the fuel pump this has not solved the problem car still wont start has anyone else came across this

thanks for looking

Edited by Gerry26 on 08/01/2011 at 19:55

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Tue 25 Jan 2011 20:49
mazda 6 - mazda 6 diesel not starting - Jetjockey

Hi. I am very surprised the SCV did not cure the problem as your symptoms are classic. I wonder if the new SCV is faulty. Was it a new unit? Don't try to fit a second hand one as these things fail at an unbelievable rate.

BTW, have you checked the obvious, such as blocked diesel filter etc.

Only real advice I can offer is to get a diagnostics chap round to read any fault codes from the car. It will give you an idea of where the problem lies and will be £40 well spent. The problem could lie with any of the sensors on the car for example. Maybe the diesel rail pressure is down?

Just fitted an SCV to my newly aquired stalling, clattering and non starting Mazda 6 and it's now running like a watch.

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Sun 30 Jan 2011 16:36
mazda 6 - mazda 6 diesel not starting - mk53

Hi Gerry.

Just reading your message, I have a simular problem with my car not starting and i have also changed the SCV with no sucess.

Have you been able to resolve your non starting issue?

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Wed 2 Feb 2011 17:31
mazda 6 - mazda 6 diesel not starting - Jetjockey

Hi.

I think the SCV tends to only cause poor starting and stalling. If your vehicle is not starting at all, then you really need to get a diagnostic machine hooked up to your car and try starting it.

You need to know if this is a fuel problem, an air problem, an electrical problem?? Have you for example got 250 bar pressure in the common rail on cranking? Is the MAF sensor giving duff info to the ECU? Is the crank sensor faulty, or the cam sensor?You really need to know. I spent a couple of hours the other day checking out a couple of Peugeot 206's that the local garage could not fix. Neither would start. One was giving no fault codes at all, and the other would not talk to the diagnostic machine. The first had jumped one tooth on the cam belt, the second had a break in one of the electrical wires.

Bottom line is, with the complexity of todays engines, you have to know where to start fault finding. Without any info at all from a fault code reader, where do you start.

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Sun 6 Feb 2011 15:18
mazda 6 - mazda 6 diesel not starting - mk53

Hi

Thanks for your feed back, current status is that the car will start and tick over when the SCV is disconnected from it's imput signal, this allows the flaps to be in a normally open position.

Previous issues that I was experiencing prior to this recent problem was no power and stalling on occassions which would clear it's self after 5-10 minutes of continuously re-starting the car when stalling, or fethering the throttle at 1-2 thousand rev when ticking over.

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Sun 6 Feb 2011 18:12
mazda 6 - mazda 6 diesel not starting - Gerry26
rite the timing/crank sensor/cam sensors where checked and all is fine

was going to scrap the car so removed the scv and refitted the oringinal
so on my way down to the scrappy (car running very bad ) it suddenly dicides to run ok this was a week ago & it hasnt stalled since ive been using it,

the only thing now is , its off a cylinder

really running out of ideas so its booked in with a "mazda specailist" on tuesday ill let you know how it gets on
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Tue 8 Feb 2011 12:21
mazda 6 - mazda 6 diesel not starting - mk53

Gerry

I have being having the same issues with my car, no power or stalling then clearing its self and fine for a number of days/weeks, then the problems comes back.

Will be greatful for any feed back.

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