Engine Pinging
4th Gear Member
Joined: Dec 2003
Posts: 1,665
From: United States
RE: Engine Pinging
ORIGINAL: mdvaldosta
No the pinging you hear is two separate flame fronts impacting each other in the cylinder.
And if you live up in colder climate locations (below freezing most of the winter) then you will get some heavily "winterized" gas which is more likely to ping. Also in colder weather the ecu adds (or doesn't pull) as much timing due to the cooler intake temps. Run some higher octane gas or octane booster that should help - also only gettin gas from places like Shell & Chevron
ORIGINAL: nemethjames1
when you hear pinging, its the pistons rocking back and forth inside the cylinder due to the gas igniting prematurely
when you hear pinging, its the pistons rocking back and forth inside the cylinder due to the gas igniting prematurely
And if you live up in colder climate locations (below freezing most of the winter) then you will get some heavily "winterized" gas which is more likely to ping. Also in colder weather the ecu adds (or doesn't pull) as much timing due to the cooler intake temps. Run some higher octane gas or octane booster that should help - also only gettin gas from places like Shell & Chevron
i was talking to a tech at the toyota dealer and he was telling me that, it is igniting in cylinders that arent supposed to fire, and the actul ping noise you here is the pistion rocking inside the cyilnder, and if you continue to let it do that it wont be long before something ****s up..... but maybe he's wrong i suppose.... but he sure seemd to know what he was talking about
2nd Gear Member
Joined: Jan 2004
Posts: 165
From: United States
RE: Engine Pinging
I got the same problem on my 95GT. Does yours seem to lose top end power too? It seems to run much better if i disconnect my MAS, so im thinkin that might be the problem. im gonna borrow my friends and see if it helps. If your timing is correct, you may just not be getting enough fuel. Check fuel pressure?
Thread Starter
Joined: Jun 2003
Posts: 36
From: United States
RE: Engine Pinging
Ya the top end seems to be horrible when it is pinging. I allready replaced the MAF and the o2 sensors and all, ill try the octane booster, 91 octane and try lowering my timing. ill let you guys know. thanx for all the info
5th Gear Member
Joined: Oct 2003
Posts: 3,742
From: Mishawaka,Indiana
RE: Engine Pinging
yes it will, and the guy at the Toyota dealer is excactly right
its your timing, set it at 10 then take it out for a WOT test, keep bumping it up a degree, then take it for a test...... bump it up... keep doing this until it start to ping then back it off1 degree, each car is different and the timing that works best fr each car will vary
its your timing, set it at 10 then take it out for a WOT test, keep bumping it up a degree, then take it for a test...... bump it up... keep doing this until it start to ping then back it off1 degree, each car is different and the timing that works best fr each car will vary
5th Gear Member
Joined: Jul 2003
Posts: 3,451
From: United States
RE: Engine Pinging
ORIGINAL: nemethjames1
i was talking to a tech at the toyota dealer and he was telling me that, it is igniting in cylinders that arent supposed to fire, and the actul ping noise you here is the pistion rocking inside the cyilnder, and if you continue to let it do that it wont be long before something ****s up..... but maybe he's wrong i suppose.... but he sure seemd to know what he was talking about
ORIGINAL: mdvaldosta
No the pinging you hear is two separate flame fronts impacting each other in the cylinder.
And if you live up in colder climate locations (below freezing most of the winter) then you will get some heavily "winterized" gas which is more likely to ping. Also in colder weather the ecu adds (or doesn't pull) as much timing due to the cooler intake temps. Run some higher octane gas or octane booster that should help - also only gettin gas from places like Shell & Chevron
ORIGINAL: nemethjames1
when you hear pinging, its the pistons rocking back and forth inside the cylinder due to the gas igniting prematurely
when you hear pinging, its the pistons rocking back and forth inside the cylinder due to the gas igniting prematurely
And if you live up in colder climate locations (below freezing most of the winter) then you will get some heavily "winterized" gas which is more likely to ping. Also in colder weather the ecu adds (or doesn't pull) as much timing due to the cooler intake temps. Run some higher octane gas or octane booster that should help - also only gettin gas from places like Shell & Chevron
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