Ticking Noise From header!/ Pinging from motor
09-21-2006, 08:55 AM
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Ticking Noise From header!/ Pinging from motor I have a CTS-V with the LS6. I have stainless works headers and magnaflow exhaust. I have a ticking noise that is comming from the collecter in the header. I have been told by my local shop that it's normal. I can't stand it! It makes it sound like I have no oil in the car. They were not Jet coated or anything. If I had them coated would this go away? The guys with kooks headers don't have this problem.
I also have been told I need to upgrade my fuel injectors. How do I tell if I need to do this? I have friends with more HP than me still using stock injectors. I wanted to up my nitrous to a 150 shot. They are always busy at this shop so I feel like they are just busy. They have pulled so much timing out that my RWHP has gone from427 to 406. I still have detanation(pinging) on low RPM starts. All of this is with no spray! Worse thing is car is so loud on WOT with spray I have no idea if I have pinging. Do I need a new shop or make them take the time to do a dyno tune again?
I also have been told I need to upgrade my fuel injectors. How do I tell if I need to do this? I have friends with more HP than me still using stock injectors. I wanted to up my nitrous to a 150 shot. They are always busy at this shop so I feel like they are just busy. They have pulled so much timing out that my RWHP has gone from427 to 406. I still have detanation(pinging) on low RPM starts. All of this is with no spray! Worse thing is car is so loud on WOT with spray I have no idea if I have pinging. Do I need a new shop or make them take the time to do a dyno tune again?
09-21-2006, 10:31 AM
#2
Sounds like.. You need to find a new shop.. fast.
There's no reason for that engine to behave like it is, unless you have "wounded" it.
As for the exh header.. could be a leak at the weld, at the end of the tube[s], where the collector is installed.
I'd take a stethescope, and listen at each exh tube, near the heads, & see if you can pick up an odd noise.
The coating on the headers won't "make" the noise go away.. You need to find the real cause[s].
As for the injectors, is the NOS a dry shot?
Have you done any datalogging with a scan tool, such as EFIlive?
Do you have a fuel pressure gauge? Check FP at WOT, and see what's going on. Could be a pump is going "south"??
Getting a bit more in-depth:
1. Compression check.
2. Leakdown test.
3. Check entire valvetrain.
4. What do the plugs look like?
Here's what you can use as a comparison:
http://cochise.uia.net/pkelley2/sparkplugreading.html
A methodical search will get the corrections made.. Without going back to the "old shop"...
There's no reason for that engine to behave like it is, unless you have "wounded" it.
As for the exh header.. could be a leak at the weld, at the end of the tube[s], where the collector is installed.
I'd take a stethescope, and listen at each exh tube, near the heads, & see if you can pick up an odd noise.
The coating on the headers won't "make" the noise go away.. You need to find the real cause[s].
As for the injectors, is the NOS a dry shot?
Have you done any datalogging with a scan tool, such as EFIlive?
Do you have a fuel pressure gauge? Check FP at WOT, and see what's going on. Could be a pump is going "south"??
Getting a bit more in-depth:
1. Compression check.
2. Leakdown test.
3. Check entire valvetrain.
4. What do the plugs look like?
Here's what you can use as a comparison:
http://cochise.uia.net/pkelley2/sparkplugreading.html
A methodical search will get the corrections made.. Without going back to the "old shop"...
Last edited by Old Geezer; 09-21-2006 at 10:50 AM.
