ticking on acceleration

taylor'95 · Aug 30, 2011

I just picked up an 04 GT 133k miles last week. Got it for a steal, but it was throwing codes for the cats. Ordered a Summit O/R H pipe for it and put it on yesterday, and it's running much better now. But the only issue I'm having is that on acceleration it has a pretty loud ticking noise, which gets louder the harder you get on it. I've done some searching and it seems like most of these cars have a ticking at idle, as does mine. But it sounds like it goes away for most people above idle. Is this sound normal and being magnified by not having cats, or is it something I should be worried about?

Maxpowers · Aug 30, 2011

You should not be having a tick on acceleration. That would most likely be detonation due to bad gas or a bad tune.

How did you turn off the CEL after adding the o/r mid pipe?

Lugnuts · Aug 30, 2011

What type of ticking? Was it there before the H-pipe install? Likely an exhaust leak. Fix it and get rid of the tick.

LarsD · Aug 30, 2011

My Cobra does this, and it is an exhaust leak. Like LN asked, did it do it before the H-pipe swap?

taylor'95 · Aug 30, 2011

Maxpowers said:
You should not be having a tick on acceleration. That would most likely be detonation due to bad gas or a bad tune.

How did you turn off the CEL after adding the o/r mid pipe?

Haven't yet, I'm planning on taking care of that when I get a tuner. The light has been on since I got the car so I've gotten used to it. I'll put some 91 in it and see if it goes away, but it's just running the stock tune.

I'm hoping it's just an exhaust leak. It ticked at idle before the H pipe, but I never noticed it accelerating until now.

joshjwc9 · Aug 30, 2011

Ticking is usually attributed to these common issues:

-Exhaust leak
-Loose Spark Plug
-TOB on manual cars. the Throwout Bearing can give a more of a slightly chirping sound without the clutch pressed in, then with slight tension on the clutch it goes away.

Couple of questions to help decide what it is:

Is it more audible from the engine or from underneath the car?

Does the tick increase with RPM's?

Are you sure you used a new gasket on the passenger side manifold with the new midpipe?

HTH,

Deleted member 38176 · Aug 31, 2011

I dont know what kind of research you've done, but ticking at idles is NOT common on these motors.

There are 3 possibilities:

1.) exhaust leak - like others have asked, did the tick exist before you messed with your exhaust? Do you smell any traces of exhaust insde the car?

2.) detonation - do you know how many previous owners the car has had? Any one of them could have had a higher octane tune installed without you knowing about it. Using regular on a tune specific for premium will often produce detonation

3.) a plug is starting to back out (as joshjwc mentioned) - I noticed a ticking noise during accel that became progressively louder over time until my plug finally blew out.

Is it a "tick" or a "rattling" (like a pebble in a tin can) noise?

jibloni · Sep 4, 2012

This year model mustangs and F-150s had a bad problem with blowing out the spark plug because when the heads were made they did not tap the threads correctly.

trinity_gt · Sep 4, 2012

jibloni said:
This year model mustangs and F-150s had a bad problem with blowing out the spark plug because when the heads were made they did not tap the threads correctly.

They were tapped correctly. There just wasn't enough threads provided.

jibloni · Sep 4, 2012

trinity_gt said:
They were tapped correctly. There just wasn't enough threads provided.

my fault bud i stand corrected. but the basic outcome is still the same though.

Kilgore Trout · Sep 4, 2012

But why bump the old thread to say what was already said?

g96v6-250k · Sep 5, 2012

id plates that are tac welded under the res/cat heat shields?

ticking on acceleration

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