i have a 2000 Ford Expedition, min did the same thing....twice. first time had a bad O2 sensor replaced that ran fine. second time was plugs Would help to know make and model of vehicle. But the most likely cause is an engine miss due to a bad plug wire or plug or a dead cylinder [no compression]. Other causes could be a vacuum leak or the fuel/air mixture may be way off. The engine is still missing at higher speeds you just don't notice it as the higher engine speed simply covers it up. This is why engine misses are usually diagnosed only at idle or under load while the vehicle is stationary. bestalucktoyou Check passenger side motor mount. A bad one will make the car vibrate at idle. The car very much may be out of time. At higher engine speeds you will not notice it. If you recently had the timing belt done or your timing belt jumped, would cause this. But first try a tune up.
Yes, when idling and driving.
spark plug gap Can also be a vacuum leak.
The engine is not hitting on all cylinders or the distributor (electronic or manual) needs adjustment.
Sounds like a misfire caused by electric supply to plugs.
Maybe its your motor mounts.
Loose motor mounts.
A miss or A collapsed engine mount or A imbalance caused by a failing component, harmonic balancers and torque converters are common.
Maybe engine misfire.
A clogged muffler can.
It might be a broken motor mount or transmission mount.
Because even when its just idling, there are 100 small explosions every second inside of it with a powerful heavy metal crankshaft rotating 1500 times per minute. You could have a bad engine mount.
The "check engine" light should be illuminated. Start with investigating the code(s). They may lead you to the cause.
check your timing and motor mounts and make sure all cylinders are igniting when needed these will most likely be the answer to your problems!
check your motor mounts if not than it might not be your motor but the pavment your driving on.
need to replace the intake manifold gasket
There are a few reasons why a car shakes when idling at a red light. Some reasons could be the ignition coil, motor mounts, or spark plug problems.
.039 to .045-----i preffered .041 it seemed to make the engine shake less. but its hard to get them to run nice and smooth. your engine might be different , i did several gap ranges . .041 worked for me, ran fairly smooth.
It could be a bad motor mount or mounts. Motor mounts have rubber in them and go between the engine and the frame. Over time the rubber gets brittle and wears out, causing the engine to shake.
Need new motor mounts..... That's what was wrong with mine.
It could if the battery was so weak as to not be providing enough voltage to run the engine. But if that were the case you could not rev the engine without it missing badly. Drive to your nearest auto parts store and they will be happy to check your charging system free of charge.
if while driving you need wheel alignment an/or wheel balancing. if it s just while idling it can be a few things like worn motor mounts clogged fuel injectors causing low or ramping rpms
Yes, either can cause a shake while driving.
I wish someone would post an answer to this one as my 1996 4 cyl Contour has this problem aslo. It paases smog with room to spare but has the idle problem. Also I wsh postings would give more info such as: what engine -4 or 6 cyl & be more specific as it makes a huge difference on getting an answer
Bad catalytic convertor. Egg smell is a dead giveaway.
Your power steering pump and or steering box may be about to give out on you.