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Thread: Starting issues

  1. #1
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    Default Starting issues

    My 2007 vectra cdti 120bhp has we problems starting sometimes. the first start in the morning no bother at all but when i stop for a short time then try to start again it takes some time to turn over. we cloud of diesel smoke form the rear then. No faults being shown.

    any ideas?

    cheers in advance

  2. #2
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    Default

    Firstly, chances are it's nothing like what I experienced (scare-mongering alert!), and some other guys will come up with something far more simple like a coolant sensor fault or something.
    However, I had similar symptoms on my 1.9cdti 120 vectra, but accompanied by a fair few other tell-tale signs.
    1) Noticed small loss of engine oil with mixed journey lengths, which was unusual as my car usually burns no oil at all between services (8-10k miles).
    2) Small weep of oil from the transmission side of the sump - couldn't see exactly where from, but turns out it was from the crank seal.
    3) Gas build up in the camshaft cover after even only a little running - could see smoke when I opened the oil filler cap.
    I had notice that the car would struggle to start if warm although it would be fine in the morning with only a puff of smoke for a few seconds.
    My car ended up suddenly using vast amounts of oil if I did a trip of over 50-75 miles (like 1L in one trip!), but I had managed 20 separate journeys of 25 miles without noticeably losing oil, so only lost oil when fully warm.
    This car is now currently having it's engine replaced as something has caused the piston to eat a 2mm chunk out of the cylinder bore on 2 cyls - car still drove ok apart from this!
    Now, this is unlikely to be your problem, but it's really easy to check the condition of the inside of the large inlet hose into the throttle body (1x7mm hex on a jubilee clip). Mine was noticeably wet with oil, not dried up carbon, but wet oil. If you have oil here, then you may have a problem similar to mine where a build up of pressure in the sump (hence the leak I noticed) and in the camshaft cover due to piston leakage forces oil into the turbo inlet. Could just be blown turbo seals of course.

    Anyway, the result was car drove ok, some smoke at startup, but didn't like starting from warm.

    I'm only telling you this because it's so easy to check and no-one else has replied with a simple reason yet!

    Good luck, fingers crossed it's something simple and cheap to remedy.

  3. #3
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    Default

    Great info there. slightly worrying though cause mine was in getting a timing belt at my vaux dealer and they noted a slight oil weep from the sump. so i need to have a look at that and see. The pipe u talk about is it on the right hand side above a coolant hose?

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    Default

    The throttle body inlet hose is the really large diameter hose (40mm ish diameter at a guess) on the right hand side of the engine bay as you like in on it. It almost touches the battery cover as it bends around into the throttle housing. It has a built-in jubilee clip (on mine at least) which has a 7mm hex nut for tightening/loosening.
    When you check for oil, make sure you look into the throttle housing - they can be dirty, but mine was literally dribbling with wet black oil. Also, if I started the engine with this hose detached, smoke would puff out of the hose. A gentle rev of 2000rpm or so sent oil splattering across the top of the engine as the turbo threw oil from the intercooler.
    Seriously though, I'm sure there are many more reasons for the symptoms you're seeing that are nowhere near as disastrous as what I experienced. Minor oil sump leaks are not unusual, so don't panic yet, but an easy check may at least help diagnose the problem.
    Good luck.

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    Default

    Eventually got the hose off todat. it was slightly damp.with oil and some sort of grime or dirt or something. any ideas?

  6. #6
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    Vehicle : vectra c 1.9cdti 120 estate

    Trim : design



    Default

    Quote Originally Posted by jonny_adams60 View Post
    Eventually got the hose off todat. it was slightly damp.with oil and some sort of grime or dirt or something. any ideas?
    Sounds about right - wouldn't worry too much about that

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    Default

    Right.ok. no probs. wot is the gunge type stuff? Where do i go from here?

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    Default

    I would check:-
    1) EGR - thoroughly clean and make sure solenoid is free moving (How2 on this site)
    2) Throttle body - clean & make sure electrical unit is free of oil (again How 2 I think)

    I suggest these first as they're relatively easy to do and cost nothing except for a few new gaskets and your time but if they make no difference and no-one comes up with a better idea, maybe the crank sensor is playing up? I've heard they can cause problems when warm if faulty.
    Sorry jonny, maybe one of the more experienced members can help you more.

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    Default

    Thats smashing mate. all advice is well recieved. done the egr valve a few weeks back so will look at the throttle body this week. is the crank sensor a big job?

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    Default

    Thats smashing mate. all advice is well recieved. done the egr valve a few weeks back so will look at the throttle body this week. is the crank sensor a big job?

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