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If the coil pack has a four wire connector, one wire is primary voltage, the other three wires are ground, one ground for each coil, one coil fires two spark plugs. If problem with coil or ground, you would lose spark for two spark plugs. Did you visually check for spark, everywhere? What about the spark plug wire or the spark plug, itself?
If it also happens when you put it in drive with the brakes on and try to accelerate, it's not a rolling problem. Sometimes as the engine accelerates, it lifts up against the motor mounts, and wires going to the firewall may lose connections. Try gently pulling on the wires behind the motor while it's idling to see if it gets rough. Think simple!
Given everything you have already done to it I would suggest checking for a faulty distributor or coil. Have you checked the timing? I had almost the exact problem in a previous vehicle and it ended up that the top of the coil wire was arching onto the exaust manifold intead of firing the cylinders. I found this out by having someone rev the engine while I inspected all the plug wires and coil wire for external sparks. Good Luck keep me posted.
I would check your coil packs and plug wires. These newer motors even the spark plug gap will cause problems. Change your fuel filter. A easy way to check for misfires have your codes read but if there is no codes it has to be something simple like plugs or wires.
Hi, I think you have not connected the proper electrical wirings it needs to feed the coil, starter motor and distributor, Try retrace your step again you must have missed some wire connection.
You're running with the twin turbo ones I assume. So by way of description you have done all the right thing except power the motor propperly. Cheers
heh, you might want to change the title here as I am pretty sure you cant idle under heavy acceleration. However I think you were on the right track with the plugs and wires. You didnt mention the cap though and that is usually the biggest culprit in damp weather. Put a new cap and rotor on it and see if that doesnt do the trick.
My guess is that the engine is misfiring. A good old fasioned tune up, spark plugs and wires, is cheap and simple enough to do if you have the basic tools to do it and if you havent had that done it is probably overdue anyway so it cant hurt. I have also seen a lot of bad coils on the Neon but in most cases new plugs and wires cures them.
It's your call but I think I'd do the Tune up first and if that doesnt fix it take it to a shop for further diagnosis.
try checking fuel pump presure & delivery
id say its starving or has a blockage
im in AUSTARLIA mate so i dont know the engine but doesnt matterif its efi you may need bigger injectors aswell
if carbs try re jetting
CHEERS
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