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Author Topic: 2.5 V6 - Difficult to start  (Read 3009 times)

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Webby the Bear

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2.5 V6 - Difficult to start
« on: 06 August 2014, 11:22:45 »

Hi guys,

Went to drive the Omega this morning and it just cranked over. I cycled the key a couple of times to prime it with fuel. Then started straight away. This is strange cos the Omega never misses a beat.

No cutting out or anything like that.

I did have the inlets out at the weekend but I'm thinking it cant be that cos i only undid fuel lines and remopved them from the valley.... i left it plugged in while i sorted my coolant leak (leaking at the coolant bridge washers).

So ill go back and make sure those fuel lines to the inlets aren't leaking.

But do we think this is early CPS failure?  ::)
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Re: 2.5 V6 - Difficult to start
« Reply #1 on: 06 August 2014, 11:30:21 »

I did have the inlets out at the weekend but I'm thinking it cant be that cos i only undid fuel lines and remopved them from the valley.... i left it plugged in while i sorted my coolant leak (leaking at the coolant bridge washers).

Had you started it since then?
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Webby the Bear

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Re: 2.5 V6 - Difficult to start
« Reply #2 on: 06 August 2014, 11:32:59 »

I did have the inlets out at the weekend but I'm thinking it cant be that cos i only undid fuel lines and remopved them from the valley.... i left it plugged in while i sorted my coolant leak (leaking at the coolant bridge washers).

Had you started it since then?

Yes mate. Put it all back together. Been running fine. Until this morn...
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Re: 2.5 V6 - Difficult to start
« Reply #3 on: 06 August 2014, 11:53:03 »

Could well be CPS then. Early stages...  :)

You will of course have a spare in the boot and the tools to fit it should you come to a grinding halt  :y

The last one that failed (on my 3.2 - 85K original sensor) fortunately got me round London and halfway back before it spat it's dummy out, which fortunately was on the A40 as I'd dived off the M40 to drive down the proper chicken shit canyon.

No codes at all and just a couple of poor starts the day before.
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Webby the Bear

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Re: 2.5 V6 - Difficult to start
« Reply #4 on: 06 August 2014, 11:53:22 »

Sorry, just to add, it also didnt start (cranked but didnt fire) when i first started it after putting the inlets back. but i put this down to the fact that i'd de-pressurised the fuel system and it had to ''refill''............. like this morning, once primed with a couple of cycles of the key it fired straight away.

sorry for any confusion :)

any ideas would be great
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Re: 2.5 V6 - Difficult to start
« Reply #5 on: 06 August 2014, 11:54:21 »

Could well be CPS then. Early stages...  :)

You will of course have a spare in the boot and the tools to fit it should you come to a grinding halt  :y

The last one that failed (on my 3.2 - 85K original sensor) fortunately got me round London and halfway back before it spat it's dummy out, which fortunately was on the A40 as I'd dived off the M40 to drive down the proper chicken shit canyon.

No codes at all and just a couple of poor starts the day before.

Thanks mate. I'll certainly be keeping an eye on this!  :y
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Re: 2.5 V6 - Difficult to start
« Reply #6 on: 06 August 2014, 21:51:17 »

Hasn't played up at all tonight (touch wood).

Here's a question though....

When my cambelt went BANG a year ago shortly before the check engine light came on. This I assume will be because the crank and cam positions would have been outta whack.

When me and Martin did the rebuild and got her running again the check engine light stayed on for a few starts and then finally went out when it realised all was once again well.

My question..... if I do the pedal trick to se if I have a crank sensor code (for the couple of poor starts recently) am I going to get the CPS code 19 from the previous explosion..... or would those codes hae disappeared on their own by now and anything new will be of late?

 :)
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Re: 2.5 V6 - Difficult to start
« Reply #7 on: 06 August 2014, 23:23:02 »

Hasn't played up at all tonight (touch wood).

Here's a question though....

When my cambelt went BANG a year ago shortly before the check engine light came on. This I assume will be because the crank and cam positions would have been outta whack.

When me and Martin did the rebuild and got her running again the check engine light stayed on for a few starts and then finally went out when it realised all was once again well.

My question..... if I do the pedal trick to se if I have a crank sensor code (for the couple of poor starts recently) am I going to get the CPS code 19 from the previous explosion..... or would those codes hae disappeared on their own by now and anything new will be of late?

 :)

Old cps code 19 should have disappeared after a year ;)
Sounds like you have a leak on an injector or on fuel rail ;)
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Webby the Bear

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Re: 2.5 V6 - Difficult to start
« Reply #8 on: 07 August 2014, 10:13:48 »

Thanks Dbug!  :y

That would be strange though. When I removed the inlets all I did was depressurise the system by pressing the Schrader valve and then undo the two fuel pipes (17mm and 19mm). Everything else stayed in tact!

I've since looked at the two unions and there's definitely no leaking there!

Luckily for me I have two spare inlets with injectors so if it persists ill simply swap it out and see what I get  :y
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Re: 2.5 V6 - Difficult to start
« Reply #9 on: 07 August 2014, 10:14:59 »

*edit* when I say everything stayed in tact I mean I only removed the bolts to be able to lift the inlets out so I could get to coolant bridge  :y
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05omegav6

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Re: 2.5 V6 - Difficult to start
« Reply #10 on: 07 August 2014, 11:05:58 »

You'd know if you had a fuel leak, even in this heat...

Crank sensor is the likely culprit, and doesn't always produce a code on the v6 :y
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Webby the Bear

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Re: 2.5 V6 - Difficult to start
« Reply #11 on: 07 August 2014, 11:10:41 »

You'd know if you had a fuel leak, even in this heat...

Crank sensor is the likely culprit, and doesn't always produce a code on the v6 :y

Thanks Al  :y

Does seem strange though that it's timing with the inlet/fuel rail removal acting up straight after.

Who knows. if it persists theres no problem in swapping that out. And in the mean time I can do the pedal trick to check for CPS codes.

Wonder if perhaps the Schrader valve's leaking also?  :-\
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05omegav6

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Re: 2.5 V6 - Difficult to start
« Reply #12 on: 07 August 2014, 11:15:54 »

Any leaks from the fuel rail assembly collects in the V before evaporating. You would smell it in the car if it leaked whilst driving. If you can see it or smell it then it isn't leaking, simples :y

Double check any plugs that you moved just to be sure, but likely to be coincidence...
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Webby the Bear

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Re: 2.5 V6 - Difficult to start
« Reply #13 on: 07 August 2014, 11:17:40 »

Any leaks from the fuel rail assembly collects in the V before evaporating. You would smell it in the car if it leaked whilst driving. If you can see it or smell it then it isn't leaking, simples :y

Double check any plugs that you moved just to be sure, but likely to be coincidence...

Thanks buddy. Defo no smell of fuel  :y :y :y :y :y :y
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cem_devecioglu

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Re: 2.5 V6 - Difficult to start
« Reply #14 on: 07 August 2014, 12:56:11 »

2 weeks ago my miggy also started to show similiar symptoms


if you cant see code 19 (which you may not) the only way to be sure is to purchase a new one :-\








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