I own a 2k Lincoln LS V6 5spd. In the past few months ive noticed a very noticable ping. Its not the gas because ive tried at least 10 different types of 93 octane. I understand that pinging is usually suppose to occur during heavy load or cheapper gas. My LS pings under normal driving conditions. It doesn't do it in first gear but only gets worst with every gear, especially in 3rd and 4th between 1800 and 2500 RPM's. Cruising at around 40MPH in 4th gear makes the loudest ping. It completly stops pinging if I gas it a little which is totaly backwards!? All 6 coils were changed 6 months ago as well as a vacuum leak which was causing the engine to run lean. I was thinking maybe the knock sensor is bad but I don't have CEL. Im stumped.
Weird pinging
- Thread starter dannyum89
- Start date
2001LS8Sport
Dedicated LVC Member
A hot spot...a lean injector...bad EGR...and a couple of other things can cause detonation like you describe. This can be a VERY serious problem and should be looked at immediately by a qualified tech.
Jim Henderson
Dedicated LVC Member
One thing you might try is a good fuel system cleaner like Techron, not the Proguard which I think is diluted techron. Those 99 cent cleaners really don't help. Use something that is good and usually expensive. Years back the magazines did some tests and said only the Techron really does anything noticable in one tankful.
You might have carbon deposits in the system. Also if you are a "grandma drives it to church on Sunday" driver, you may need to romp on it once in awhile to clean it out.
It sounds like you have a bigger problem than just carbon deposits tho. Sounds like a timing or fuel mix issue.
But my solutions are relatively cheap to try.
Good Luck,
Jim Henderson
You might have carbon deposits in the system. Also if you are a "grandma drives it to church on Sunday" driver, you may need to romp on it once in awhile to clean it out.
It sounds like you have a bigger problem than just carbon deposits tho. Sounds like a timing or fuel mix issue.
But my solutions are relatively cheap to try.
Good Luck,
Jim Henderson
SilverLS
Dedicated LVC Member
See I have the same problem I just went down and bought an octane booster and filled it with 93 and octane booster and I have a very very quick and small ping now vs the heavy long from 600-1,800
Next Im going to get the fuel system cleaner and run that threw it ....Ive tried to pull all the timing I could with the x-cal with -14 and there was no difference...so Im not sure its timing....I have not had any other problems....im gonna run a the DTC check again and see if there is any "hidden" codes...
Next Im going to get the fuel system cleaner and run that threw it ....Ive tried to pull all the timing I could with the x-cal with -14 and there was no difference...so Im not sure its timing....I have not had any other problems....im gonna run a the DTC check again and see if there is any "hidden" codes...