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Jan 18, 2010 | 06:35 PM

Formulals187

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What to do

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.

Jan 18, 2010 | 06:53 PM

LS6427

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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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Jan 18, 2010 | 07:46 PM

Formulals187

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

Jan 18, 2010 | 08:18 PM

LS6427

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Quote:

Originally Posted by Formulals187

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

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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Jan 18, 2010 | 11:41 PM

98pontiac

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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)

Jan 20, 2010 | 05:30 PM

Formulals187

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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.

Jan 20, 2010 | 05:33 PM

LS6427

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Quote:

Originally Posted by Formulals187

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.

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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