Solutions for engine pinging/detonation?
#1
Solutions for engine pinging/detonation?
This isn't on a Honda, it's on my wife's 1996 Toyota Corolla, which has a 1.8L engine, pretty similar in technology to the early OBD-2 B18B engines, except it just rotates the opposite way
Anyway, it's been having a problem with pinging when lightly pressing the gas pedal for awhile now. I tried running some Seafoam through one of the vacuum hoses, but the problem still persists. I may try it again because I think I didn't use enough of it last time.
But is there anything else I can do short of pulling the head off and cleaning out the carbon? I even tried running some 89 octane fuel for a couple of months instead of regular 87, and even that didn't help.
Anyway, it's been having a problem with pinging when lightly pressing the gas pedal for awhile now. I tried running some Seafoam through one of the vacuum hoses, but the problem still persists. I may try it again because I think I didn't use enough of it last time.
But is there anything else I can do short of pulling the head off and cleaning out the carbon? I even tried running some 89 octane fuel for a couple of months instead of regular 87, and even that didn't help.
#2
This isn't on a Honda, it's on my wife's 1996 Toyota Corolla, which has a 1.8L engine, pretty similar in technology to the early OBD-2 B18B engines, except it just rotates the opposite way
Anyway, it's been having a problem with pinging when lightly pressing the gas pedal for awhile now. I tried running some Seafoam through one of the vacuum hoses, but the problem still persists. I may try it again because I think I didn't use enough of it last time.
But is there anything else I can do short of pulling the head off and cleaning out the carbon? I even tried running some 89 octane fuel for a couple of months instead of regular 87, and even that didn't help.
Anyway, it's been having a problem with pinging when lightly pressing the gas pedal for awhile now. I tried running some Seafoam through one of the vacuum hoses, but the problem still persists. I may try it again because I think I didn't use enough of it last time.
But is there anything else I can do short of pulling the head off and cleaning out the carbon? I even tried running some 89 octane fuel for a couple of months instead of regular 87, and even that didn't help.
#3
This isn't on a Honda, it's on my wife's 1996 Toyota Corolla, which has a 1.8L engine, pretty similar in technology to the early OBD-2 B18B engines, except it just rotates the opposite way
Anyway, it's been having a problem with pinging when lightly pressing the gas pedal for awhile now. I tried running some Seafoam through one of the vacuum hoses, but the problem still persists. I may try it again because I think I didn't use enough of it last time.
But is there anything else I can do short of pulling the head off and cleaning out the carbon? I even tried running some 89 octane fuel for a couple of months instead of regular 87, and even that didn't help.
Anyway, it's been having a problem with pinging when lightly pressing the gas pedal for awhile now. I tried running some Seafoam through one of the vacuum hoses, but the problem still persists. I may try it again because I think I didn't use enough of it last time.
But is there anything else I can do short of pulling the head off and cleaning out the carbon? I even tried running some 89 octane fuel for a couple of months instead of regular 87, and even that didn't help.
Run a compression check first to see if your compression ratio is in spec.
All 4 cylinders. Try adding gumout or injector cleaner to your fuel or fill it with real high test (high octane) gas. If the pinging is still there you may have a spark plug problem or a ignition advance too far. That means first adjusting the advance to spec or perhaps 2 degrees retarded. Then R&R the plugs.
If the knock goes away you probably do have carbon buildup to the extent that compression is too high for regular.
If it doesn't, you either have a lot of carbon buildup or...
If that doesn't do it then you need to check for leaking head gasket. Water or oil into the cylinder will reduce your octane rating. Especially if carbon buildup is enough to raise your compression beyond help.
Try those first... After that it gets tougher.
good luck.
#5
According to the Haynes Repair manual for Corolla years 1993-2002 that I kept when I had the 2000 corolla...
Trouble shooting #16 : Pinging or knocking enging sounds during acceration or uphill
Possible causes:
1. Incorrect grade of fuel
2. Ignition timing incorrect
3. Fuel injection system faulty
4. Improper or damaged spark plugs/wires
5. Worn or damaged distributor components
6. EGR valve not functioning
7. Vacuum leak
I once had serious pinging problems at all speeds because aftermarket spark plugs were out of spec. It was fixed when I got OEM spark plugs from toyota. Unfortunatly, dealer sells for more expensive. Maybe you should check timing or drivebelt to see if timing isn't off or uneven tensioned.
Trouble shooting #16 : Pinging or knocking enging sounds during acceration or uphill
Possible causes:
1. Incorrect grade of fuel
2. Ignition timing incorrect
3. Fuel injection system faulty
4. Improper or damaged spark plugs/wires
5. Worn or damaged distributor components
6. EGR valve not functioning
7. Vacuum leak
I once had serious pinging problems at all speeds because aftermarket spark plugs were out of spec. It was fixed when I got OEM spark plugs from toyota. Unfortunatly, dealer sells for more expensive. Maybe you should check timing or drivebelt to see if timing isn't off or uneven tensioned.
#6
Check the EGR valve and associated hoses. I've had them go bad before but I've never owned a Corolla. Vacuum leak is another good place to start, especially if your car has a vacuum spark advance.
When working through lists like these, I usually start with the least expensive items first.
When working through lists like these, I usually start with the least expensive items first.
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