I have a 93 f130 with a 302, automatic, and a 3.55 rear end. I posted this question before about my trucking pinging. And most of the responces was the gas. I have now ran two tanks of the good gas and I still hear the pinging when I accelerate. I done a compleate tune up about 5 months ago using Borgue Warner wires cap and roater. AC Delco plugs along with a fuel filter and pcv valve. Also a Bosch O2 sensor. Any Ideas? Also could anyone tell me what kinda a tranny I have, it shows over drive and drive on the colum and does not have the push button for over drive? Another question I have does 15 miles per gallon seam about right on the hiway driving about 75 mph? Thanks!

 

I have a 89' f150 302 and my truck pings when it shifts from 2nd to 3rd, regardless if it is in OD or in Drive...I have even added octane booster and it still does it...no one has answered me either...will keep waiting...

 

Check and verify your base timing with a timing light. Factory spec. is 10* btdc at idle. Over advanced timing will cause pinging.

 

Did it ping before you replaced the plugs and wires?

 

You have an AOD trans. If you're sure it's not gas causing the pinging then it's probably your timing. You should be about 10 degrees BTC with the engine warm and the spout connector removed.

 

I also have a 93 with 5.0L, E40D, and 3:55 rear that pings. It started after I had the dealer replace a bad coil along with TB cleaning and a de-carbon process they talked me into at 127K miles; I now have 180K miles. I also noticed the shift points were a few MPH higher than before. I took it back and the dealer said everything was per the spec. I initially just went to 93 octane but it still pinged a little. I retarded the spark and ran it that way for a couple of years still using 93 octane but the performance was off and it was harder to start. I have since reset the timing, replaced plugs, cap, rotor, wires, and pcv a couple of times. I just replaced the egr, evp, and map thinking there might be a vac leak or bad seat in the egr. I have noticed it is OK when cold but as soon as it comes up to temp it will ping under moderate acceleration in the upper gears. It usually does not ping under hard acceleration coming away from a light until it is in second or third gear. I also used a code reader and usually get a system pass but I did get a 212 code one time which indicates a loss of IDM input to ECA or spout circuit grounded. Wiring looks good, I pulled the distributor and it looks OK. At this point I am open for suggestions.

Chuck

 

unplug the vacuum on the fuel pressure reg, installing a adjustable reg. will help.
the computer adjusts the fuel flow thru pulsing of the injectors based on info recieved from O2 sensor i moved my O2 sensor 12'' away from the right exhaust manifold. i installed 1.76 (cleveland) rocker arms on the intake valves this helped quite a bit and boosted performance. set the timing back to 0' but you can play with the timing to see where the ping stops.
Oh ...one more thing a clogged/malfunctioning injector/s will cause ping, due to the reduced fuel flow...

 

I will repeat some of what has already been said.

Modern verhicles run on the lean side so the manufacturers can meet CAFE standards in the release stage of their life-cycle. Often at the dealer the vehicles are adjusted to run richer to avoid customer complaints. Any problem that leans your mixture can put you across the line in the complaint zone, vacuum leaks are common and not always easy to find. Malfunctioning EGR will lean your mixture and cause a ping. Even if the valve opens and closes properly, the passages could be clogged.

If you have a cylinder that is not pulling its load that puts the load on the rest of your cylinders and it is like they are pulling uphill all of the time and you hear the ping. This can be determined by a cylinder balance test. I may not have the name of the test exactly right, check it.

Anything that advances your timing can cause a ping, carbon buildup or anything that raises your compression can cause a ping.

 

I still have that ping also at highway speeds when i try to accellerate (without kicking it into passing gear). It's driving me batty. No codes
So far I have:replaced plugs , cap, rotor, wires O2 sensor, throttle position sensor,checked egr valve, timed 10' before (with spout unplugged) Injector and rail cleaned out at the ford dealership. I use chevron 91 oct gas,no additives, change oil every 3k. Compression tested all cylinders at 155-165....BUT IT'S STILL THERE! when speeding up at 65 or going up hills. the rest of the time it sounds great. 232k miles on original eng. no valve or engine work . any ideas?? please help .. OOPS. I also replaced coil and knock sensor and fuel filter.

 

Did it ping before you replaced the plugs and wires?

 

yes, it was pinging and jerking at around 35mph. I originally took it to a ford dealer to see if any codes. They came up with nothing and suspected it was a burned valve. I drove it for a few days then coil went dead and I thought I would check compression while I went through a tune up. Another post talks about egr might be clogged . I thought it was OK (pulled a vaccuum and held it fine)......

 

I too have a truck that pings, i mean the last motor did!!!! I had to replace it because the pinging was so loud it sounded like i was going to throw a rod. Only higher octane gas fixed it, but not all the way. Check the knock sensor and replace it. Otherwise, plan on chaning the motor. U may have a bad block or head. My head was cracked accross the 2 3 and 6 exhaust valves. Not a good sign. If its a instant ping that stops its no big deal, but if its constant, as was mine, change the motor or the knock sensor.

 

Nothing to do with pinging I'm sure, just wondering, Why would you put AC Delco plugs in a Ford?

If pinging were the result of gas (either octane, bad gas, or just cheap stuff) it could take multiple tankfuls before noticing a difference.

It's possible for you (and those experiencing "years of pinging") the valves could be burned, and/or excessive carbon buildup not allowing proper seating.
The seats could also be effected.

Step one should be verify timing.

 

Thanks for all the input. Racerguy I dont know if it was pinging before I changed the wires. Bought the truck last September with 75K miles on it, drove it straight home and done tune up on it since it looked like it had never been done. I only used the good gas for about two fill ups (both tanks). I will try using the good stuff for a month, but will hurt my check book since I drive 150 miles a day to work and back. As far as using AC Delco plugs that is all I have ever used in my Chevys, this is my first Ford. Would going back to motorcraft help anything? I do have a vaccum leak some where, cause my ac will start blowing out the defrost vents when motor under load. Again thanks for all the good info.

 

try engine cleaning to remove carbon build-up seafoam---you could have excessive carbon in the combustion chambers and this could be the cause of the ping-sounds like you have tried everything else, spend the $5 on a can and see what happens. most of the above responses have 100k+ miles on them. without the advanced timing to burn 90+ octane you could be adding to the carbon buildup-recognizing that you have to burn higher octane to control the ping, these trucks are set for low grade octane (85-87 depending where you live). a couple of posts mention this above. used it on mine (check sig) and made a WORLD OF DIFFERENCE! mine pinged when I put the foot down or towed the boat, bought it at 75K, tune up immediately, same as all the others above, did the seafoam 2 times to engine and 1 time added to tank of gas=NO MORE PING!