Question about 1986 Renault Sport

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Miss-fire and possible leak?


I know you are a clever guy when it comes to the internal combustion engine so here's me asking your advice!! I have my suspicions as to what's wrong and what may need doing, but before I go off to the garage, tell them and do that thing where they **** the air through their teeth, shake their head and tot up in their minds just how much money can be made from this all simultaneously (is this the only time men multi-task?) I thought I woud ask you.
My car (still the renault!) - I look under the bonnet to do the usual checks for oil/water etc this morning and around the seal on the top of the engine it would appear that oil(?) is seeping through, especially into the 3rd plug from the left. This, I suspect is what is causing the thing to keep missing a beat and if I could find my plug spanner would take it out and look at it, but as I think I left it down at my parents a few months back, I can't do that just now.
So.................what do you think?

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Hi, You need to find out where the oil is coming from for sure before you do anything, it may be just a gasket needeng to be replaced have the engine cleaned and check for those leaks if you dont find nothing outside the engine ,remove the spark plugs and see if thet are wet with oil,if the oil is coming from inside the chamber ,internal repair need to be done,C1

Posted on Dec 02, 2008

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One of the main causes of white exhaust smoke and coolant loss is a cracked or warped cylinder head, a cracked engine block, or head gasket failure caused by overheating. A cracked head may allow coolant to leak into one or more cylinders or into the combustion chamber of the engine. Dirty coolant, a poorly maintained cooling system, a low coolant level, or a non-functioning cooling fan can cause engine overheating. In addition, engine wear can eventually cause the gaskets to lose their capacity to seal properly allowing internal coolant loss. Intake manifold gasket and head gasket failures are two of the most common sources of internal coolant loss caused by engine wear.
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Turns over will not start


Depending upon your level of expertise I would say pull a spark plug and look for a spark.

Any gas combustion engine requires a fuel mixture and spark to "fire" If you know your spark plugs are firing, then the problem is most likely going to be fuel flow.

If it doesn't fire AT ALL. and you are sure you have a good spark, then its probably going to be a computer controlled fuel flow issue.

Are you getting any "service engine soon" lights? Got a really good charge on the battery? Is the engine cold like below freezing? And I gotta ask.... are your sure there is enough gas in the tank? If its low and sitting on a hill its possible its not getting any gas.

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Never remove the radiator cap or coolant reservoir cap while the engine is hot or running as it can cause serious injury; always allow the car to cool down completely first. Checking for a low coolant level in the reservoir is the first step in determining if coolant loss is causing the white exhaust smoke. If the coolant reservoir is at the proper level but excessive white exhaust smoke is present, a cooling system pressure check is required to determine where, if any, coolant leaks are located. THESE LEAKS WILL CAUSE SEVERE ENGINE DAMAGE! Have the car inspected immediately.

I
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Start with a fuel pressure test. check vacuum hoses for leaks, check intake manifold and throttle body assembly for leaks. If you have an exhaust leak at or near the engine, can cause misfires. Air going into the engine is metered by the mass air flow sensor in the big air boot on the throttle body. If extra air gets into the engine through a vacuum leak or a loose hose, the engine computer won't know it, so the air/fuel mixture will be too lean, resulting in misfiring. Several things to check-good luck.



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Thanks for using FixYa - a FixYa rating is appreciated!!

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Time for a new vehicle...

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