Toyspeed.org.nz Message Board

by **MRDOCA** » Wed Aug 29, 2012 10:23 am

I dont think the problem with my car us octane related though since running 98 produced the exact same results. someone suggested trying a hotter sparkplug. Thoughts on that?

by **sergei** » Wed Aug 29, 2012 11:17 am

MRDOCA wrote:I dont think the problem with my car us octane related though since running 98 produced the exact same results. someone suggested trying a hotter sparkplug. Thoughts on that?

If the it is pinking, the last thing you want to do is turn up the boost.
The hotter sparkplug will potentially cause more pinking (and detonation). Stick to the correct heat range (stock is the best, NGK BKR6EP-8 or ND PK20R8).

Pinking can caused by excessive carbon build up, incorrect ignition timing, incorrect air fuel mixture..

What spark plugs look like and what are they (ie are they correct)?

by **MRDOCA** » Wed Aug 29, 2012 11:42 am

i'll post them up when i pull them out, anything i can do about mixture and timing though?

by **sergei** » Wed Aug 29, 2012 11:57 am

MRDOCA wrote:i'll post them up when i pull them out, anything i can do about mixture and timing though?

Not a lot. I believe timing is not adjustable, and mixture can be affected by fuelling issue (fuel pump/filter) or by sensor/ECU issue (which is normally picked up by ECU).

by **MRDOCA** » Wed Aug 29, 2012 12:05 pm

yea i'll look into the fueling and see if its that, i really hope its a easy fix, its been doing it since ive owned it

by **sergei** » Wed Aug 29, 2012 12:17 pm

MRDOCA wrote:yea i'll look into the fueling and see if its that, i really hope its a easy fix, its been doing it since ive owned it

Are you sure it is pinking and not leaking exhaust manifold/turbo housing?

by **MRDOCA** » Wed Aug 29, 2012 12:27 pm

thats a good point actually, its a shame i cant record the noise lol ive read about the manifold warping so i'll check that aswell. should be black where its leaking no doubt?

by **MRDOCA** » Wed Aug 29, 2012 1:24 pm

ok so spark plugs arent looking that flash...
they are denso PKR20R8 so either toyota replacements or ????

pic is of the 3rd plug.

by **MRDOCA** » Wed Aug 29, 2012 1:28 pm

also doesnt look like any leaks round exhaust mani and turbo

by **sergei** » Wed Aug 29, 2012 2:08 pm

Plugs are probably original. They don't look too bad either. The oil on them is from leaking valve cover gasket.
Check for blackness under alternator.

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