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Oh no, I am pinging.........

Elwood 2000

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Elwood 2000 Senior Enthusiast

Elwood 2000

Posted
Posted

The past month, my 5.3 has been pinging under acceleration. I have tried every octane of fuel known to mankind, an "injector cleaner" and still no help. I have inspected all fluids, mainly water and around the intake gasket and saw nothing that looks out of line.

 

Please tell me that I am dreaming or something, but please do not tell me my intake gasket is going. :confused: I have been told that once the original one goes, getting the new one on and torqued properly is next to impossible and it will be an ongoing problem for the life of the truck.

 

My truck has 61k and I was hoping for a lot more time before problems like this came up.

 

 

Thoughts anyone?

 

:fume:

jhm Senior Enthusiast

jhm

Posted
Posted

I have the same pinging that started at 16k and only happened rarely. Now with 34k, it is there whenever I accelerate. They tested everything, replaced knock sensors, cleaned the top end and it is getting worse. They told me "piston slap" and it is a-ok because it is normal! At least I got a free 6 yr 100k warranty on the engine. If you find a fix for this, thousands of people will be thanking you!

Butch 02 Denali Enthusiast

Butch 02 Denali

Posted
Posted

75% chance it's a dirty MAFS. take it out and spray it from both ends to clean the little wires inside with a plastics safe and non residue spray cleaner. I use electronic parts cleaner. Let dry and re-install.

If that doesn't do it, but I bet it will, check the fuel pressure and look at fuel filter, fuel pressure regulator or fuel pump.

 

Butch 02 Sierra Denali

Taaaaaaahoe? Enthusiast

Taaaaaaahoe?

Posted
Posted
75% chance it's a dirty MAFS. take it out and spray it from both ends to clean the little wires inside with a plastics safe and non residue spray cleaner. I use electronic parts cleaner. Let dry and re-install.

  If that doesn't do it, but I bet it will, check the fuel pressure and look at fuel filter, fuel pressure regulator or fuel pump.

 

Butch 02 Sierra Denali

at the risk of sounding stupid,

Where is the MAFS?

 

MIke

Shaners Senior Enthusiast

Shaners

Posted
Posted
at the risk of sounding stupid,

Where is the MAFS?

 

MIke

The MAFS is connected to the airbox on one side and the air intake tube on the other. It has a modular plug in it, and a wire running out of it. It is round and hollow except for the screen inside) and the air flows through it as it's on it's way to the intake...

frdfandc Enthusiast

frdfandc

Posted
Posted

Just a FYI reguarding the MAF. The little wire can break very easily, even when just using a spray cleaner. I have never cleaned a MAF before, because its very, very rare for buildup to occur so close to the air cleaner. I probably would replace the fuel filter if you haven't done so in a while. They need to be replaced at least every 30k miles. Somestimes earlier, like every 15k.

Butch 02 Denali Enthusiast

Butch 02 Denali

Posted
Posted

Actually it's getting to be a common problem. The #1 culprit are the oiled filters like the K&N, people tend to over-oil them and bring a slight oil mist on to the wires making the very fine dust that the filter misses stick. It does happen to stock paper filters too, just not as frequent. The wires aren't that fragile. No problem at all spraying with a solvent. Most that do clean their MAFS feel an improvement in performance and smoothness, along with ping reduction. I clean mine every 6 months because I run a K&N. I have cleaned 2 buddies trucks for them, with the stock filter, and could see the dust sticking to the wires. Afterwards one said he had more power and the other one stopped pinging.

 

Butch 02 Sierra Denali

knightrider2000 Enthusiast

knightrider2000

Posted
Posted

I'm a firm believer in the Sea Foam.. Have run it through my vacuum lines to clean the top end, and also added it to the fuel tank.. Got rid of my pinging on acceleration.

 

Matt

ril850 Enthusiast

ril850

Posted
Posted

:withstupid: Hey Butch 02 Denali:

Can you tell me exactly what you use to clean the MAFS since I also run a K&N FIPK I think it would a good a idea to give mine a spray. Can you find this stuff at a lets say "Radio Shack"?

Butch 02 Denali Enthusiast

Butch 02 Denali

Posted
Posted
:withstupid: Hey Butch 02 Denali:

Can you tell me exactly what you use to clean the MAFS since I also run a K&N FIPK I think it would a good a idea to give mine a spray. Can you find this stuff at a lets say "Radio Shack"?

I forgot what brand I got but I found it at AutoZone. It is "Electronic Parts Cleaner"

and it says no-residue and plastics safe on the can, I think it was only 3 bucks. Radio Shack should have it too. Some guys use BrakeKleen but I feel safer with what I use!

 

Butch 02 Sierra Denali

joeman2199 Enthusiast

joeman2199

Posted
Posted

hey, i have some pinging i just noticed at WOT, have a k&n, and am planning to do the MAF clean up, but i want to go over this again, just so i dont break nuthin...

 

your using this electronic spray cleaner, and you just spray it onto the wires on the MAF sensor and clean w/ a q-tip, and should i leave the MAFS in place, and just take off the hose?

 

also, has anyone else noticed this problem since installing the k&n?

 

sorry for asking such simple questions, but i want to do this right

 

thanks for the help :withstupid:

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