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HI guys

I have a 98 156 1.8 TS which drives like a dream. However in the last couple of days, I feel a change in Sound when I start the car and when its in Idle speed waiting to warm up and it sthe same when I accelerate the car in first or second gear. It sounds more like a sport car to be honest and it does sound like i have a sporty exhaust or something!( So I Kinda like the sound, but I m sure something is not right)..The sporty sound seems coming more through the exhaust than the engine itself..But I m not so sure on this one..Maybe the engine sound is different and thats why the sound from the exhaust sounds different?

Its not the diesel sound bcos of the faulty variator.. I know how it is...During Summer times, I do have problems with my MAF, but I hardly doubt if this is the case..

I checked the oil level and its bit lower than I thought. SO i wil be changing it in 2days and if the sound doesnt go back to normal, then I m lost..

I am a lil bit worried . Please help me if you have some tips or ideas..Oil, Timing belt? anything?
 

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I agree with GhostDog, A small hole in the exhaust system could make it sound different at lower revs.

If it is the case it will over time possibly get noise from the hole geting bigger. Had much exprience of this with my old escort :lol:
 

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I agree, check the resonator, thats the thing that looks like a muffler just in front of the rear wheels.. just before the rear muffler... they tend to rust... the rest of the system is stainless steel (the pipe anyway), so wont rust.
 
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Using a thick workman's type leather glove, place your hand over the end of the exhaust to seal it temporarily and cause some back pressure... Any hole, no matter how small will become quickly apparent.

If all is well with the exhaust then the other two common causes of "sporty gruffness" are:

The induction consertina that attaches to the throttle body could be split and perished... Remove it. Use two to three latex/ rubber inspection gloves with rubber bands to seal it up and place it underwater in a bowl....
Any air bubbles that escape will confirm this. Use vulcanising fluid from a bicycle tyre repair kit to repair any tiny splits and the area will be stronger than it was before :thumbs:

Or

The black plastic swirl cone that fits onto the underside of the airbox lid has come loose....

Nothing major but as long as you can remove the airbox lid bolts freely, worth checking and refitting it back on... If not, don't worry too much, it will run ok without it being attached properly until you need to change the air filter on the next service:thumbs:
 

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Discussion Starter #6
Hey guys,

Thanks for ur feedback, yes I will certainly focus my attention now to the exhaust and the silencer area.. i hope to find out something today.. will keep u guys posted....
 
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