Maybe I've gone mad...

brownieXR8 · 23-11-2011, 02:33 PM

Over the weekend I changed plugs (BPR6EFS-13), Leads (Eagle Eliminator), coils (MSD) and cam sync. Now for some reason, and maybe it's in my head, but my exhaust seems to have gotten a drone at highway speeds...

Is this even possible? I wouldn't have thought so. The car has standard extractors and cats, but I think has an aftermarket cat back (I've not seen an factory exhaust, so can't be 100% sure).

On a side note, plug 5 is a real pain in the butt to get at. I assume this get worse with after market extractors?

Mr Hardware · 23-11-2011, 02:39 PM

cam sync - as in the cam that opens and closes the exhaust valves?

It's entirely possible.

brownieXR8 · 23-11-2011, 02:49 PM

Cam sync was squealing when cold, as is not unusual from what I've read on here. Unless the sync wasn't functioning at all, surely that wouldn't have an effect on the valves opening / closing. And yes, it was removed and installed with cylinder 1 at TDC and all lined up the same going in as it came out.

I should point out this is on the XR8 220 in case that wasn't clear.

Sox · 23-11-2011, 06:26 PM

I would suspect it's all in your head.

FGII-XR6 · 23-11-2011, 07:51 PM

Quote:

Originally Posted by Mr Hardware

cam sync - as in the cam that opens and closes the exhaust valves?

It's entirely possible.

I think he means he changed the camshaft position sensor that goes in the hole where the distributor would go

**Peuty** · 23-11-2011, 08:09 PM

Quote:

Originally Posted by brownieXR8

On a side note, plug 5 is a real pain in the butt to get at. I assume this get worse with after market extractors?

With Pacies it gets harder, but it's not impossible. Socket with a ring spanner does the trick.

5.0 ED · 23-11-2011, 08:35 PM

Yes it is possible, you have just change components that effect how well the engine run's and its overall tune.

The drone being a result of now running better and smoother, aka more consistant firing of all cylinders.

b2tf · 23-11-2011, 10:47 PM

Quote:

Originally Posted by Peuty

With Pacies it gets harder, but it's not impossible. Socket with a ring spanner does the trick.

Add in lots of swearing. With difillippos it is a real PITA.

brownieXR8 · 24-11-2011, 02:56 PM

Quote:

Originally Posted by au3xr6

I think he means he changed the camshaft position sensor that goes in the hole where the distributor would go

Yeah, that's the one. Couldn't remember the exact name of it.

Quote:

Originally Posted by b2tf

Add in lots of swearing. With difillippos it is a real PITA.

There was already plenty of that. Had to go searching for a socket with a hex on it and then go to the old man's to get a spanner...

While we are on the subject, does anyone have a pic of the factory cat back?

**Peuty** · 24-11-2011, 03:02 PM

No you got the name right. It was the 6cylinder owner that was confused!

needaXYGT · 24-11-2011, 03:38 PM

Quote:

On a side note, plug 5 is a real pain in the butt to get at. I assume this get worse with after market extractors?

I used a normal short socket so it would rub against the header and welded a handel to the side of the socket. worked well.

Mr Hardware · 24-11-2011, 04:33 PM

sigh.

FGII-XR6 · 24-11-2011, 06:01 PM

Quote:

Originally Posted by Peuty

No you got the name right. It was the 6cylinder owner that was confused!

I knew what the correct name was but was trying to explain the function of it