How do you get rid of Pinging?

[Diameg]

Okay,

The more I think about it, the more I am getting convinced that my car is pinging.

Problem is, it is with and without the LPM/80mm.

What causes it and how do you get rid of it?

Is it fuel pump related? (I suspect my fuel pump could stand to be replaced, just a hunch).

I suspect I'll get the bad news tomorrow from Josh and Mark that it is pinging, and I better stop driving it.
Damn.

Mike

 

[PROPHET]

IVE been hearing its the knock sensor.

 

[Mr Anonymous]

Knocking is generally a result of preignition (premature or spontaneous combustion of the gasses in the cylinder).

Have you ran the codes yet? It could possibly be as simple as a bad knock sensor, or even the gas you're using. Higher octane fuels have higher anti-knock properties. It could also be a restriction in the fuel system, like a partially clogged filter or a failing pump causing the engine to run lean. It could also be a timing probalem or a problem with the plugs. There are lots of potential causes. Considering your idle problems along with the knocking, I would definitely place the fuel system high on the list of things to check first.

As I mentioned in a previous thread, since you have these problems both with and without the MAF/LPM combo, that combo probably isn't responsible for the problems.

The bottom line is you need to take a systematic approach to isolating and correcting the problems you're having. Since your 60K hasn't been done yet, this would be a good place to start. Aside from the overall benefits from such comprehensive maintenance in the 60K, you will eliminate a number of the potential causes of your problems in the course of the 60K. At the very least you should check fuel system pressure, change the fuel filter and check for any codes.

FWIW, knocking by itself isn't necessarily cause to pull the car off the road. You just might want to avoid alot of WOT runs until you can isolate and correct the problem. You might try a different brand and higher octane gas too.

 

[Diameg]

SHOooo,

Okay, thanks for the great info. Perhaps some background will help you guys (and therefore me) diagnose my problem.

I check the codes on a regular basis. Nothing about knock sensor or lean conditions, but I don't put much stock in the codes anyways.

I always use the highest octane I can get and currently have 104+ octane boost in there as well.

Fuel filter was replaced recently (1000 miles or so).

Plugs were changed within approximately 8000 miles, along with wires, and TPS.

The poor idle condition is only present with the LPM/80mm MAF. The possible pinging is present with and without.

I am anxiously awaiting to do the 60K. Just need a few more parts. All I really need to do for the 60K anyways is the timing belt/waterpump, and valve lash adjustment.
Wires, plugs, T-stat, plug well seals, valve cover gaskets were all replaced within 8000 miles.

I am going to add fuel pump and knock sensor to my list, since the intake will be off anyways (from my understanding the knock sensor is just under the fuel rails?).

Fuel pump......I keep narrowing down to this thing. I hear it whining but I've been told that you can hear it. Somehow, I feel I hear it more now than before, but it could be my imagination. Funny thing, yesterday, for the first time ever, I turned the key to the on position and did not hear the fuel pump come on. It was the oddest thing as it has always primed before.
Car still started, but that worried me.

Well, hopefully I'm narrowing it down anyways. I'm so sick of replacing parts hoping it fixes a problem only to find that I have to replace more parts.

I'll get that fuel pump near the top of my list.

Any suggestions on which kind? I guess 155lph is okay for me?
Do all parts come with the pump? I have heard the check valve or something does not??

Mike

 

[Slo-Sho]

I'm wondering if your car has so much carbon built up in the cylinders. I would do the Decarbon procedure twice if I had your car. Good luck.

 

[BeatDaSHO]

yo man. I have a little bit of pinging also. I have replaced my knock sensor because it came up in my codes but my car still pings a little. I use 93 all of the time and I change stations to try different gas. I have tried octane boosters but they don't work. I'm not worried about it too much now. A little pinging isn't bad for an engine. Don't worry if it's a little ping.

Greg

 

[SHODUDE]

slosho:
I'm wondering if your car has so much carbon built up in the cylinders. I would do the Decarbon procedure twice if I had your car. Good luck.

I second that. Its not a normal thing for most SHOs to have this problem, but it still happens once in a while.

Also, you said that it happens with or without the 80MAF and LPM. Have you been resetting the computer after removing them?

 

[Diameg]

Yes, I reset the computer now whenever I do anything on it.

I will check on Shotimes about the decarbon procedure.
Is it a possibility that carbon buildup is causing it to fire too early?

I'm willing to try anything to get rid of it.

Thanks.

Mike

 

[Dave Kegel]

Vacuum leaks can cause pinging. Any unmetered air that's getting injested will lean out the mixture. Is it possible you have a vaccum leak? Maybe intake gaskets or loose rubber connectors on the intake?

Dave Kegel

 

[MeShoHorny]

Diameg:
Yes, I reset the computer now whenever I do anything on it.

I will check on Shotimes about the decarbon procedure.
Is it a possibility that carbon buildup is causing it to fire too early?

I'm willing to try anything to get rid of it.

Thanks.

Mike

The carbon buildup raises the CR usually in the cylinder heads. By raising the CR you can get the pinging problem you have described.