Car Juddering after changing Spark Plugs?
The squeachy noise is the fan the drive belts either the PAS or the alternator. Change them and make sure the belt's are correctly adjusted.
The 306 has a known problem with the coil pack, its located on top of the engine on the r/h side. Over time the heat from the engine results in a break down of the insulation on the pack.
Strange that it only started when you overfilled the engine oil.
If I was you I would start from the spark plugs, remove them, clean them and check the gap on them.
Then replace the HT leads, again over time they can break down through the heat of the engine and after removing them to change the spark plugs you and aggravate there condition.
If this does not cure the problem then I would try your local scrap yard for a replacement coil pack.
Car Juddering after changing Spark Plugs?
I have a Nissan Micra which used to bunny hop along the road. The engine also used to keep cutting out. It is an automatic. Eventually a test showed that it was an air sensor on the throttle housing unit and the whole unit had to be replaced.
You may need to get the car thoroughly overhauled by a reputable garage (I was towed to one by automania) and they can fully investigate and give you a diagnosis. Won't be cheap though. Hope this helps.
I haven't delved under the bonnet of a car in years but remember:----
The screechy screaming noise sounds like a fan belt is slipping.
The juddering noise if it happens when you turn the engine off and it seems like it wants to keep going is called pinking or pre-ignition.
The juddering would most be due to your clutch plate which may be contaminated with oil or grease. Therefore you are not getting full contact with the flywheel when driven.
To make sure you don't have an ignition misfire, install new spark plug wires if they've never been changed. Also a new distributor cap and rotor if they have over 30000 miles on them and your vehicle is so equipped.
Ok, a bit surprised your %26quot;ex mechanic%26quot; did not advise you to clear your engine breather. Pressure builds in the crankcase during normal operation, this pressure is vented through the engine breather pipe. High pressure would cause the problem you discribe. Over filling your engine with oil can block this pipe. Usually it is a pipe leading from your air filter housing down to you engine block. Remove the pipe and clear it, you need to also clear the metal pipe attached to the block. As far as the squealing, you belts need replacing.
Jez.
Hi
The screeching noise is almost definitely the drivebelt slipping, and unfortunately, I have a gut feeling you need to have a cylinder compression test carried out because it sounds as though you've popped the head gasket (unless of course you didn't gap the plugs properly, but I doubt it).
Very best regards
Geordie
the screach noise could be your fan belt or water pump, as for the juddering did you replace your HT leads properly, did you check the space on the bottom of your plugs (there should be a small gap about 2-3 mm), without looking at your car its hard to tell the problems.
the noise is likely to be the fan belt.
Soz mate but sounds like it's ready for the scrappers!
