low rpm knock with e85
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low rpm knock with e85
weird phenomenon.
Evo VIII on e85 getting high knock counts, with evoscan in low rpms 2800-3200 rpms....
Above 3200 I can rip on the car without a count... below and gradually rises.
Tried changing the timing, both down then up. Nothing happened, same response, Leaned it out a bit, and nothing happened. back to timing and nothing.
I'm just stumped... Only other issue I hear is my power steering pump, which wines like a dying bird... thought that could be setting it off but I won't know till I replace it.
Got M2's, 16g, and fullrace header.
Evo VIII on e85 getting high knock counts, with evoscan in low rpms 2800-3200 rpms....
Above 3200 I can rip on the car without a count... below and gradually rises.
Tried changing the timing, both down then up. Nothing happened, same response, Leaned it out a bit, and nothing happened. back to timing and nothing.
I'm just stumped... Only other issue I hear is my power steering pump, which wines like a dying bird... thought that could be setting it off but I won't know till I replace it.
Got M2's, 16g, and fullrace header.
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Well I've been reading threads for the last two hours and could be a number of issues.
Here's just a few mechanical issues that could be the problem:
- Cam not lined up properaly
- Jumped timing - valve train
- clutch, exhaust, header vibrating
Here's just a few mechanical issues that could be the problem:
- Cam not lined up properaly
- Jumped timing - valve train
- clutch, exhaust, header vibrating
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If he jumped timing then he'd have bigger issues then low RPm knock....more then likely something is setting the knock count off and at lower RPM's your cams might cause it vibrate more then normal (You might be on to something with the power steering making noise). If your exhause is hitting something and making a metal on metal sound I've seen that give phantom knock as well.
What count? 2-3?
What count? 2-3?
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count goes all over the place, sometimes hitting as high as 30 counts. This only happens between 2900 - and 3300 rpms. It's a very small narrow band.
I definitely might have rattling issues with my exhaust, I know it almost if not does vibrated against my cusco underbrace. I've also been told it could be from my fullrace headers. Clutch is getting old and there's more chatter than before.
I definitely might have rattling issues with my exhaust, I know it almost if not does vibrated against my cusco underbrace. I've also been told it could be from my fullrace headers. Clutch is getting old and there's more chatter than before.
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I'm not throwing any codes at all.
So weird, it only shows knock at really low load... and only in the 3000 - 3500 rpm range.
today on my way to work I'm cruising in 5th gear and it still does it around 3400 rpms.
Replaced my spark plugs this wkend, and no signs on the plugs of detonation...
Thinking of turning down my knock sensor sensitivity in this region...
So weird, it only shows knock at really low load... and only in the 3000 - 3500 rpm range.
today on my way to work I'm cruising in 5th gear and it still does it around 3400 rpms.
Replaced my spark plugs this wkend, and no signs on the plugs of detonation...
Thinking of turning down my knock sensor sensitivity in this region...
#9
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I'm not throwing any codes at all.
So weird, it only shows knock at really low load... and only in the 3000 - 3500 rpm range.
today on my way to work I'm cruising in 5th gear and it still does it around 3400 rpms.
Replaced my spark plugs this wkend, and no signs on the plugs of detonation...
Thinking of turning down my knock sensor sensitivity in this region...
So weird, it only shows knock at really low load... and only in the 3000 - 3500 rpm range.
today on my way to work I'm cruising in 5th gear and it still does it around 3400 rpms.
Replaced my spark plugs this wkend, and no signs on the plugs of detonation...
Thinking of turning down my knock sensor sensitivity in this region...
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So I turned down the knock sensor sensitivity. Now only seeing maybe 1 count of knock in the lower rpms. Car pulls amazing, no more falling on it's face. Like you Roadspike, I'm thinking my M2 cams are what's setting it off.
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