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-   -   2 Noises (http://www.focusfanatics.com/forum/showthread.php?t=303862)

Neptune15 12-07-2012 12:14 PM

2 Noises
 
2007 ZX3 2.0 Manual

First Noise:

This has been there for about a year, but it doesn't really affect performance (just hope it's not a safety hazard) so i haven't looked into it. I hear a popopop sound when going slow over bumps, and it sounds like it's coming from the left front. I can feel a little bit of vibration through the cabin when this happens. Sometimes when I clutch down and the pedal hits the firewall, it makes a similar noise. The latter is a newly developing issue.

Upgrading the shocks/struts didn't affect this noise.

When I poke around, everything seems tight except for the stabilizer bar endlinks, which have a little give. I'm not sure if they are supposed to have a little give or not. The sound is coming from one side, and the endlink feels the same on both front corners. I can rotate the endlink about the y axis, not sure if this is normal?

Second Noise:

This is a newly developing problem. Might have to do with the cold. When coming to a stop, I hear a groaning/creaking. The last thing I did to the car was swap the brake lines for SS lines, but I'm not sure how that can be the culprit.

The car still has a year left on the warranty, but I'd like to get some idea of what could be the problem before bringing it in.

Thanks for any feedback.

EDIT: Bonus problem:
One morning, when it was really cold out, my car would start fine, but immediately die. It wouldn't hold an idle. I warmed up the car with my foot, and tried again, but still no idle. I disconnected/reconnected the IACV, still no idle. I cycled the key a couple times and it worked. This only happened once, but I'm wondering if I should be concerned.

elsolo 12-07-2012 01:31 PM

Just my $.02 and a couple guesses

Quote:

Originally Posted by Neptune15 (Post 4488306)
2007 ZX3 2.0 Manual

First Noise:

This has been there for about a year, but it doesn't really affect performance (just hope it's not a safety hazard) so i haven't looked into it. I hear a popopop sound when going slow over bumps, and it sounds like it's coming from the left front. I can feel a little bit of vibration through the cabin when this happens. Sometimes when I clutch down and the pedal hits the firewall, it makes a similar noise. The latter is a newly developing issue.

Upgrading the shocks/struts didn't affect this noise.

When I poke around, everything seems tight except for the stabilizer bar endlinks, which have a little give. I'm not sure if they are supposed to have a little give or not. The sound is coming from one side, and the endlink feels the same on both front corners. I can rotate the endlink about the y axis, not sure if this is normal?

When you replaced the struts, did you replace the plastic "strut bearing" rings at the mounts? If the struts can't rotate a little bit during spring compression, they can make a spring popping noise.

Endlinks should have no play, but you can get them to rotate a little around the vertical axis if you grab them and twist. It should be firm and tight, not sloppy and loose.

If you can get the front wheels off the ground and check for sloppy ball joints, tie rod ends, etc.

Quote:

Originally Posted by Neptune15 (Post 4488306)
Second Noise:

This is a newly developing problem. Might have to do with the cold. When coming to a stop, I hear a groaning/creaking. The last thing I did to the car was swap the brake lines for SS lines, but I'm not sure how that can be the culprit.

The car still has a year left on the warranty, but I'd like to get some idea of what could be the problem before bringing it in.

Thanks for any feedback.

Some brake pad friction material is just noisy on some cars. Sometimes, perfectly fine aftermarket brake pads and rotors make a horrible moaning sound that can only be rectified by swapping to OEM or equivalent.

The pads on my focus make a bad groaning noise when they are cold or the rotors have flash rust on them, goes away after one stop every time. I don't know what kind of pad they are, they stop just fine so I will wear them out.

Quote:

Originally Posted by Neptune15 (Post 4488306)
EDIT: Bonus problem:
One morning, when it was really cold out, my car would start fine, but immediately die. It wouldn't hold an idle. I warmed up the car with my foot, and tried again, but still no idle. I disconnected/reconnected the IACV, still no idle. I cycled the key a couple times and it worked. This only happened once, but I'm wondering if I should be concerned.

Maybe it was gunked up with deposits, or one pole of the stepper motor is dead, or it was just too cold, or who knows. If it happens again, I would be more concerned, if it never replicates, meh.

Neptune15 12-08-2012 11:52 AM

Thanks.

The strut bearings are new too. I think it's not something with the struts or springs because the noise was there before and after I replaced them.

The brake pads are Motorcraft brake pads, on original rotors, so it's odd that they'd be making the noise. It's not a big deal anyway.

Last I checked for play around the suspension components, everything felt solid.

Could the popping noise be from a bad transmission mount? It kind of does sound like two things banging into each other. It makes the noise when going over bumps and sometimes when I use the clutch pedal. If I'm in neutral and I use the clutch pedal while standing still, there is no noise. It's only when I'm moving and changing gear.

elsolo 12-08-2012 06:32 PM

Yeah, if your engine/transmission is flopping around due to a worn out mount, noises may be heard.

I was thinking about your IAC issue yesterday while washing my car, I wonder if some condensed moisture in the IAC froze up overnight.

Neptune15 12-09-2012 12:09 PM

I was thinking the same thing. I have an FSWerks CAI, not sure if that has to do with it.


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