04 Taco Engine Ping/Spark knock w/ only 79,000
#1
04 Taco Engine Ping/Spark knock w/ only 79,000
2004 Tacoma 3.4 L 4x4 w/ 79,000 miles.
Truck pings/knocks under any load, through all gears intermittently. It will only do this when at operating temperature and is worse with the A/C on.
Higher octane gas helps a little bit, but not much.
List of things done to the truck recently:
New:
O2 sensors
MAF sensor
Air Filter
Plugs/Wires (plugs about 4-5K miles ago)
Coolant Change
Have run bottles of fuel injector cleaner every once and awhile.
Checked:
Codes/Freeze Frames w/ OBDII Inova Scanner. Nothing shown.
Gas mileage has been very steady, with a slight drop in city driving mileage.
No felt power loss.
Have not checked:
Vacuum lines for leaks
Extra air intake causing a lean condition
I am at a loss gentlemen and/or ladies. Short of taking it in to a mechanic to go through, I don't know what else to look for or check. I really don't think it should be pinging like this. My 94 22re doesn't ping like this unless I'm dropping the throttle in a high gear with the A/C on.
Any ideas would be appreciated.
Truck pings/knocks under any load, through all gears intermittently. It will only do this when at operating temperature and is worse with the A/C on.
Higher octane gas helps a little bit, but not much.
List of things done to the truck recently:
New:
O2 sensors
MAF sensor
Air Filter
Plugs/Wires (plugs about 4-5K miles ago)
Coolant Change
Have run bottles of fuel injector cleaner every once and awhile.
Checked:
Codes/Freeze Frames w/ OBDII Inova Scanner. Nothing shown.
Gas mileage has been very steady, with a slight drop in city driving mileage.
No felt power loss.
Have not checked:
Vacuum lines for leaks
Extra air intake causing a lean condition
I am at a loss gentlemen and/or ladies. Short of taking it in to a mechanic to go through, I don't know what else to look for or check. I really don't think it should be pinging like this. My 94 22re doesn't ping like this unless I'm dropping the throttle in a high gear with the A/C on.
Any ideas would be appreciated.
Thread
Thread Starter
Forum
Replies
Last Post
polo451
General Vehicle Related Topics (Non Year Related)
13
11-20-2016 07:49 PM
Matt16
General Vehicle Related Topics (Non Year Related)
7
08-14-2009 08:37 AM