Hello, I know this has probably been beat to death, I tried to find some good info using the search, but did not find much. My 02 CC V10, auto, F250 (69K miles) is pinging pretty good. This last weekend I put some injector/top end cleaner in and it helped a little. Basically anytime it is under load it gets a ping. It is especially noticable at 1200-1400PRM, but even at 1800-2000 PRM I can still get it. I am not getting a check engine light so I do not believe that anything is getting stored in the computer. I am thinking about changing out the MAS since I see that this is common issue. I bought the truck used at 60K and it seemes to be in pretty good condition (Mechanic said that it looked like all of the maintenance had been done). Should I think about the knock sensor and is this somthing best left to the dealer (not real comfortable pulling the intake)? Any help is appreciated. StevenG

 

Hey oldrifleman

Create a signature so we can tell a little more about your truck.

Post about where you are and what "clean" air blends of fuel and brands you typically use.

My experience is that you might have one or more things that can screw with this system..... are you running a K&N or other "oiled" filter? If so perhaps the hot wire on the MAF is fouled... this is a very delicate part but must be oil free to work right.

Has the Idle Air Control (IAC) valve ever given you problems, rough idle, or need to elevate idle to keep running?

The way the system id supposed to work the computer will deliberately set the fuel air leaner and leaner until ping happens then back off spark advancement to the point where ping is no longer detected. My understanding is it works this way up through 3/4 throttle but at Wide Open Throttle WOT it decides you need want more power so it richen up the mixture a lot.

The O2 sensors, the CHT, the VSS, the vacuum emissions, the fuel cap and a host of other systems all interact in the PCM decisions on this.

But the easiest bet is that you got crap fuel or your state changed to seasonal clean air fuels and they suck and some motors just don't like it.

Have you experimented with mid grade or premium?

Any warranty left? If so let the techs track it down ... Ford books say a slight pinging will occasionally be noticeable but should go away as the system reacts. If not and constant ...stop driving and get service as severe engine damage can occur.

BTW check you warranty closely there are many components of the emissions system that have a longer than 36/36,000 warranty.

 

Thanks for the reply. The truck is stock, I had a K&N on a Dodge turbo once and that was enough. no idea what was on the truck 5 months ago, it is currently a ford paper filter. I have been using Shell gas most of the time, this last tank was the mid grade. The truck idles fine, no worries there. I was cruising around, a few small hills here and there, and would get the pinging on the way up the hill and force a down shift and the pinging would not be noticable. Yes the truck is a little sensitive to fuel brands (no arco/store brands). I am going to start running premium to see what that does but hate the $2.45/gal around here. I guess I should stop by the dealer and have them check the computer to see if there is anything stored.

 

A year or more ago, there were a lot of posts about pinging, and some of those people got relief from resetting the computer.

Disconnect the battery, leave it overnight, then reconnect in the morning.

It is possible the knock sensor is not working, but the computer usually complains about that.

 

I am sorry I missed noting this but I find a LOT of todays younger people who did not suffer the bad pinging we older folks experienced in the 70s.

A lot of times what some drivers seem to hear as pinging is really some of the weird and annoying resonances from loose vibrating parts.... notably on these V10s is the trans/torque converter inspection shield and some of the exhaust shields.. many times I have diagnosed the problem as these noises when the driver was sure it was pre-ignition "pinging"

Just a thought, and do check all the tinny crap that can make similar noise before you run off and waste a ton of money on premium fuel and diagnostics. Even if premium fixes it you still need to get the system fixed.

 

I had the same problem with pinging. No one has been able to find the cause so I have to use super all the time. The computer reset is worth a try, but probably won't fix it. It's probably the way I drive, you know you have to be taught how to drive a superduty!

 

Again, one to two years ago, a few people on here found a solution in resetting the computer.

It seemed at the time that there is a bug in the computer's software where it would erroneously advance and not pay attention to the knock sensor. Resetting it usually fixed it for quite a few people.

But Fred's right - it could be anything rattling too...

 

When towing at certain speeds, conditions I thought I was hearing a constant light pinging. After jacking around and messing with it, it turned out to be just an exhaust sound. It almost drove me crazy till I figured it out.

 

Yeah I have the exhaust sound as well, but at 1100-1400 PRM under load (slight hill/towing) I almost always get pinging until I force a downshift or the hill ends.

 

oldrifleman When I was out in WA last fall my truck developed a ping, I believe it was low elevation and the quality of the gas. I did find one station that it didn't ping when I used that brand but I can,t remember what it was. I live at 2000 ft and I have had no problem with any pinging until I was close to sea level.

Denny

 

Just run some super in it, if it stops pinging then you know it isnt a rattle.

 

Interesting discussion. My '02 pings as well... and I know it's not an exhaust sound as it goes away when running "high-octane" fuel. Was beginning to think the previous owner had 'chipped' the truck, but it may just be a "normal" '02 thing. Truck sure does run good though.

Detonation isn't severe in my truck, just a bit more than I'm used to. As a matter of procedure on all new-to-me vehicles, I reset the PCM. That's one 'fix' that didn't work for me. Will be reading with interest to see how this discussion goes.

 

Is it possible that your engine ping is being caused by a carbon build up in the combustion chambers? I have a lot of experience with motorcycles and a BMW I have will consume some oil then build up carbon and start to ping. Some guys have resorted to pulling the heads and decarbonizing and this will stop the pinging till it builds up the carborn again. Then it was discovered that a heavy dose of a fuel treatment like techtron will help to just burn out the carbon. I now have found that there is a product called Yamaha ring free that will burn out the carbon in just one tank of fuel. It pretty much stops the pinging and it takes about 6,0000 miles for it to come back again on the bike. I haven't had to try this on my V10 but I would start using a fuel system cleaner if I thought there was a carbon problem. There is also a BG product that is comprable to the Yamaha ring free and I have heard of car guys using the Yamaha product for decrbonizing older car engines and helping to get thru inspection. The ring free is available at any Yamaha motorcycle dealer. Just some thoughts hope it helps. Art