Formulals187

iTrader: (3)

I've been noticing that my car has a ticking sound whenever it idles. Whenever I start to accelerate it accelerates kind of jerkily. Whenever I'm cruising in 4th gear (A4) around 40 mph it again starts to run jerkily. There are no misfire codes. I have checked the plugs and wires, no wires touching the headers. Whenever I was at the shop we changed to another coil pack on a cylinder and it ran better, then we switched back to the original and it still ran ok, but now its not. Should I buy a new coil pack for that cylinder or what should I do.

LS6427

iTrader: (2)

Maybe change that coil pack again with another one and see what happens. Could be a leaky injector(s) too. That would cause stumbling and choking.

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Formulals187

iTrader: (3)

Where could I buy a new coil pack from? How do I check for a leaky injector? Would a leaky injector throw any codes?

LS6427

iTrader: (2)

Just remove the rails and leave the injectors mounted to it. Then turn the key on so the fuel pump primes and see if any of them leak. Give it a couple minutes to see.

I guess buy a coil from an auto parts store so you can return it if its not the problem.

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98pontiac

bring it to a shop, they might be able to pick something up on the misfire counter, without it setting a misfire code, and could point you in the right cylinder. I would only buy GM coils, or a set of 8 used ones for that price (I have 8 spares of my own)

Formulals187

iTrader: (3)

I checked the injectors none were leaking so my next thought is that I'm going to get some fuel inejector cleaner and octane booster and see if that helps.

LS6427

iTrader: (2)

Skip the octane booster...its useless.

A full can of Sea Foam in 1/4 tank of gas. If its dirty injectors, that will clean them.

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