Engine pinging
#1
Driver
Thread Starter
Engine pinging
I've got a 90' LS400 with around 180k on it that has been pinging for some time. It does it almost exsclusively under light acceleration. Se***s to be worse in the summer with the AC on. I've tried lot's of fuel treatments, put in a new air filter, no engine codes, I use premium gas. Any ideas?? Thanks.
#2
Pole Position
Originally Posted by dry-fly
I've got a 90' LS400 with around 180k on it that has been pinging for some time. It does it almost exsclusively under light acceleration. Se***s to be worse in the summer with the AC on. I've tried lot's of fuel treatments, put in a new air filter, no engine codes, I use premium gas. Any ideas?? Thanks.
#3
Lexus Champion
A common cause of engine pinging is carbon deposit. Many top brand gas treatment like Techron or STP claim to remove it. From my own personal experience with my last car, only the Berryman Chemtool B-12 worked. You can find it at AutoZone. Just one bottle will do.
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#8
Lexus Champion
iTrader: (2)
Pinging means detonation usually. Common causes are carbon deposits as mentioned already, but also faulty fuel pump/filter, timing. Pull your plugs and see if they are black (normal depending on how old they are), or have a sheen of silver on them (bad). That will show you how serious the problem is. Full tune up is in order.
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