I just changed the valve cover gaskets, put everything back together and it wont start. I checked spark and noticed 1 plug was not firing. I decided to change the coil pack and plugs and wires. All cylinders are firing now and there is fuel on the plugs when i pull them but car still wont start. When I turn it over it seems sluggish. Any ideas?
SOURCE: car wont start
these cars go through coil packs regularly as the packs overheat due to their position on the end of the engine. I have 3 lanos and have replaced all coil packs at around 90,000 k's.
Hope this helps.
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: mercedes c200 elegance 1996 model mis-firing on cylinders 1-4
I beleive your firing order is 1 3 4 2. 1 and 4 are companion cylinders-meaning the piston is up or down at the same time i.e. compression and exhaust stroke both pistons are up and even on the exhaust stroke the ignition fires in order to burn unburnt fuel/ h ve you checked your trigger. There is a good coil testing tool that is placed over the coil and has a magnetic pickup that allows you to see if the coil is being triggered-just because you have power doesn't mean that you will have spark. I would replace your ignition wires and look at your wiring harness very carefully- if it is very brittle and you see bare wires exposed that is your most likley problem because the trigger is working for 1 and 3 and has the crank senser input for all for spark plugs and the cam senser is used for ignition advance and your fuel injection system. try wiggling your harness and see if your coils start to work. wireharnesses are a major problem on mercedes benz vehicles of that era. I hope I have been helpful
SOURCE: I changed spark plugs 04 Hyundai Santa fe
Check vacuum and/or electrical connections at the fuel pressure regulator,usually located on the fuel rail near the line from the gas tank. It sounds like your regulator is being held 'wide open' by too much vacuum or no signal from ECU.
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