1985 505 Exec problems
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  1. #1
    Fellow Frogger!
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    1985 505 Exec problems

    Hi all...
    I recently purchased a 1985 Pug 505 exec STi auto off my elderly grandad as a first car. Its's never been driven hard its whole life, and was serviced by a local pug mechanic every 5000km since 1990. Its done about 230K.

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    However, the other day, when i started the pug, it didnt sound to healthy. There is a very loud chugging sound, an there has been a very noticible loss of power. It intermittently stalls on idle, and sounds like an old Mercedes diesel. It also randomly backfires (or so i think...). My suspicion is that it is the head gasket on the engine?????

    Any suggestions as to what it might be and if its going to cost a small fortune to repair? Also, some advice on things i should look out for in future would be nice...

    ...Also, is a 1985 505 exec a series 1 or 2?
    Thanks,
    Jason
    Jason Judd
    <img border="0" alt="[Peugeot Emblem]" title="" src="graemlins/peugeot.gif" /> '85 505 GTi Executive
    <img border="0" alt="[Peugeot Emblem]" title="" src="graemlins/peugeot.gif" /> '88 205 GL 1.1

  2. #2
    Fellow Frogger!
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    Also...

    Pardon my ignorance, but there is some dispute as to wether it is a GTi exec or STi Exec... How do i tell the difference?
    Jason Judd
    <img border="0" alt="[Peugeot Emblem]" title="" src="graemlins/peugeot.gif" /> '85 505 GTi Executive
    <img border="0" alt="[Peugeot Emblem]" title="" src="graemlins/peugeot.gif" /> '88 205 GL 1.1

  3. #3
    1000+ Posts Rod Hagen's Avatar
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    Jason, the symptoms you describe could result from anything from a very minor problem to a very major one.

    I'd be checking the minor ones first.

    Are all the plug leads and the coil to distributor high tension lead properly connected?
    Is the distributor firmly attached or can it "swivel" in its mount?

    Has the car had a bad load of fuel or been run very low in the tank (you could have a blocked fuel filter)?

    Is the "low tension" lead to the distributor shorting anywhere, or is its attachement to coil or distributor loose?

    Are any of the fuel injection control leads loose or corroded?

    have any of the vacuum leads come loose or cracked? (this is a good place to look first in fact with the symptoms you describe)

    Unless you have good reasons to the contrary (overheating, oil in the coolant, coolant in the oil, etc) I'd be suspecting something minor rather than fearing the worst. A compression test should eliminate head gasket issues and other similar things if you are seriously concerned about them.

    Essentially when you run into a problem like this remember that an engine runs on three things, electricity, air and petrol. Try and find out which "system" is causing the problem. If you have good spark at the plug leads, for example, then you can eliminate electricity unless the timing is way out. If you don't have good spark , then focus on the ignition system.

    If you are in the RACV they will probably be able to identify the primary cause very quickly for you. You can then post back with a new query if you want to know how to fix it yourself.
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  4. #4
    Guru davemcbean's Avatar
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    Jason,

    If it's a GTi executive it should have leather seats. If it's an STi it will probably have velour seats.

    Also if you look at the engine and there's a straight piece of square or round metal tubing running along the tops of the fuel injectors, then it has electronic injection and is therefore a GTi.

    Alternatively, if each fuel injector has a separate plastic or rubber tube which goes to a large thing on the driver's side of the engine bay, then it has mechanical injection and is therefore an STi.

    To add to what Rod said, you should regularly check the oil and water (once a week or even once a day) if you haven't already been doing so. Checking once a day may seem like a hassle, but the 60 seconds it takes can save you alot of money, because you're likely to find any problems before they get bad. The only thing is that if you're like me, after you've been checking for years and years and nothing ever goes wrong, you start to expect everything to be OK and you tend to leave it much longer between checks, which is a bit dangerous.

    Dave
    NZ Fleet
    1976 504 Ti
    1984 205 GT twin carb
    1991 205 SI 1.6GTI motor
    1994 106 Xsi
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  5. #5
    Fellow Frogger!
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    Thanks Rod

    I followed youre advice, and checked all of the things you listed. Turns out, it was th very last thing i checked, a small orange vacum lead from the fuel injectos had come off its socket. I think i might have to get some of the lines replaced soon, as many seemed a bit corroded.
    Thanks Again,
    Jason
    Jason Judd
    <img border="0" alt="[Peugeot Emblem]" title="" src="graemlins/peugeot.gif" /> '85 505 GTi Executive
    <img border="0" alt="[Peugeot Emblem]" title="" src="graemlins/peugeot.gif" /> '88 205 GL 1.1

  6. #6
    Fellow Frogger!
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    ...It's definitely a GTi then...
    Jason Judd
    <img border="0" alt="[Peugeot Emblem]" title="" src="graemlins/peugeot.gif" /> '85 505 GTi Executive
    <img border="0" alt="[Peugeot Emblem]" title="" src="graemlins/peugeot.gif" /> '88 205 GL 1.1

  7. #7
    1000+ Posts Rod Hagen's Avatar
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    [quote]Originally posted by Pug505exec:
    <strong>Turns out, it was th very last thing i checked, ) </strong><hr></blockquote>

    This is one of the fundamental laws of nature, Jason. The place where the problem lies is ALWAYS the last thing you check! (unless, of course its the very first thing you check, but you check it wrong)

    Glad you got it going properly again without any major hassles.

    Enjoy

    Rod
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  8. #8
    con
    con is offline
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    Not necessarily a GTI: If my meory serves me correctly, towards the end of 1985 some Australian 505 STIs were fitted out with Ljet injection systems (according to Denis Barbour).


    con....

  9. #9
    Fellow Frogger!
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    T'is a GTi...
    Leather, L-jetronic, & the original rego documents state its a GTi...
    Jason Judd
    <img border="0" alt="[Peugeot Emblem]" title="" src="graemlins/peugeot.gif" /> '85 505 GTi Executive
    <img border="0" alt="[Peugeot Emblem]" title="" src="graemlins/peugeot.gif" /> '88 205 GL 1.1

  10. #10
    Guru davemcbean's Avatar
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    [quote]Originally posted by con:
    <strong>Not necessarily a GTI: If my meory serves me correctly, towards the end of 1985 some Australian 505 STIs were fitted out with Ljet injection systems (according to Denis Barbour).
    </strong><hr></blockquote>

    Con,

    That probably only applies to plain STI's which don't have a sunroof or bolstered seats or GTI suspension ratings. All Executives have a sunroof, bolstered seats and I think uprated suspension, so if you put a GTI engine in an executive, I think it's automatically a GTI. I could be wrong about the suspension though.

    Dave
    NZ Fleet
    1976 504 Ti
    1984 205 GT twin carb
    1991 205 SI 1.6GTI motor
    1994 106 Xsi
    1996 Mondeo V6
    Aus Fleet
    1955 203C
    1997 Civic Cxi (great allrounder- revy, flexible, nimble, comfortable , economical, simple and durable )

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