November 20, 200421 yr It won't stop At 20 btdc it's ok, 23 and up the pinging comes on when I accelarate hard in 2nd 3rd or 4th but only for the first half second then it's gone. Nothing. not even at wot 15 psi 6.5 krpm. I was hoping a quick tune would remedy but no luck. Any suggestions? Intake temps are cool, motors in good shape. Recently looked at heads/pistons and they are still clean. Plugs are good. Coil? it's an accell, my third one, who knows if it's ok. I have an Autometer guage and it doesn't look like theres any boost spikes. It sucks having to lower the advance just so it doesn't ping for a half second at the beginning of each hard shift. I've searched and a few people have talked about this and it would seem it's the pre 87's that have this issue. Any Ideas? :-\
November 20, 200421 yr It won't stop At 20 btdc it's ok, 23 and up the pinging comes on when I accelarate hard in 2nd 3rd or 4th but only for the first half second then it's gone. Nothing. not even at wot 15 psi 6.5 krpm. I was hoping a quick tune would remedy but no luck. Any suggestions? Intake temps are cool, motors in good shape. Recently looked at heads/pistons and they are still clean. Plugs are good. Coil? it's an accell, my third one, who knows if it's ok. Get something that will retard timing just after a shift and then advance it thereafter. Or have more fuel added just at the beginning of each shift (with a fuel computer, aftermarket ECU, etc) and keep adding it until the pinging is gone. After this point, reduce fuel to where you have it at now further up the rpm range. I'm just throwing things out there until you get some more concrete answers. In the meantime, you should either reduce your boost or retard the timing until you get that squared away. Oh yeah, you can go with higher octane fuel also if it's available to see if it helps. What octane of fuel are you using anyways?
November 20, 200421 yr wot at 6.5k should never ping, its when the turbo starts to boost, and the motor is working hard, or lugging.
November 20, 200421 yr Author Make sure the EGR system is in good working order. Checked. EGR system is screwed. Looks like the plastic where the vac hose goes into EGR solenoid is cracked/broken. I'm going to replace it ASAP junks permitting. I run 92 octane. If the new solenoid stops the pinging maybe I can go back to 25 btdc. Cheers.
November 20, 200421 yr anybody think .... a colder spark plug higher octane fuel different fuel company would help? How about a PO doing the insolater under the knock sensor mod?
November 20, 200421 yr Author anybody think .... a colder spark plug higher octane fuel different fuel company would help? How about a PO doing the insolater under the knock sensor mod? I've tried 94 and it was a bit better. I use platinum plugs with a .045 gap Tried different fuels, no luck. I think I remember a thread about the knock sensor mod. but I'd like to try and find what's wrong. It didn't always do this. What's a PO? EGR cuts out at positive pressure so I'm thinking the problem lies elsewhere. I recently cleaned and lubed my disty and that fixed the surging at cruise but not the pinging that starts as soon as I mat it and then stops .5 sec later. :-\
November 21, 200421 yr i personaly have had bad luck with platinum and high compression, and turbos. maybe go ngk conventional, or nippon desno! sorry that word deserves a !!!!!!!!
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