My 2008 chevy cobalt has a cylinder 4 misfire i changed all the sparkplugs and the cylinder sensor how to tell if its the coil? It shakes and when i drive it it wants to die takes long to take of dosnt pass 40 mph

SOURCE: 1998 Cavalier No Spark in cylinders 1 & 4

ignition mod. grounds,pcm or timing belt could all be it but, I would have to look at timing first.

SOURCE: Hyundai Sonata 2000 model 4

Hi there. I can solve this dangerous problem you are having. You would loose acceleration at lights and intersections, the engine will shake and revs can go crazy. The issue is the MAF (mass air flow) sensor. It was recalled in 2001 as a safety problem as people died driving this model of sonata. If you connect your comp up to a diagnostic machine you will find its the MAF the problem is a problem that is hard to ctah on a diagnostic machine though as it comes and goes. You will need to replace the MAF ASAP as you can die from this fault and hyundai will not care due to the age of this car.

SOURCE: 2005 Jimmy 4X4, 4.3L, P300 multiple misfire. Have

Try some injector cleaner in the fuel--there might be some water in the fuel also. Check the air cleaner.

SOURCE: 2007 aveo misfire faults

gm has a problem with this from way back. double check your spark plugs and if they are not ac delcos, change them. ive seen this time and time again swearing, myself, that there is no way that the plugs would cause this issue. it always comes up with random misfire and usually another 1 or 2 codes misfire codes. put in ac delco, no more codes. let me know

SOURCE: i have a 99 grand am SE 2.4 4 cylinder and my

A misfire doesn't always have to be ignition... it's just the most common cause. Faulty or plugged injector, low compression. You need to check fuel pressure and test the fuel injector flow. Then check compression. If you don't have tools for these tests, take it to someone who does. Testing is much cheaper than throwing parts at the problem.