(I mentioned this in some thread about engines blowing, but I don't think it's detonation anymore.)
Last week I installed my AWR front motor mount and Kartboy bushings, and the day after, when I was driving to school, I heard this obnoxious "pinging" sound. I found that I would only hear it if I was in gear (it doesn't occur in Neutral), and only if it were in vacuum or boost (like, if I had the throttle where the boost gauge reads close to 0 psi, then the sound goes away). It's very slight, too, so that if I have the window open I cannot hear it, and I think it's coming from either the center or the passenger's side of the engine bay.
I thought it might be detonation, at first, but after a week the car's still driving fine and it would be really weird to have detonation just because of an aftermarket motor mount and/or shifter bushings. I'm thinking it could be something loose and rattling, too, but I don't see that correlates to hearing it only in severe vacuum or in boost.
So I'm thinking it's a leak. I checked the engine bay and I see that there is one vacuum line that is cracked at the opening - see attached picture - and this one is located behind the middle of the intake manifold (does anyone know what size the vacuum hose is, so I can buy a replacement?). I haven't looked closely at all of them though. Also, I tried flooring it in 2nd, and it would spike to 6.0 and then drop quickly to 5.5; I'm pretty sure (but not 100% positive) that I used to boost 6.5 but I know how it fluctuates from car to car.
Edit: Looks like Hosetechniques is having a 25% off sale! Question is, I heard that the lines (for the Protege kit) don't really fit ours that well. What're your recommendations?
Last week I installed my AWR front motor mount and Kartboy bushings, and the day after, when I was driving to school, I heard this obnoxious "pinging" sound. I found that I would only hear it if I was in gear (it doesn't occur in Neutral), and only if it were in vacuum or boost (like, if I had the throttle where the boost gauge reads close to 0 psi, then the sound goes away). It's very slight, too, so that if I have the window open I cannot hear it, and I think it's coming from either the center or the passenger's side of the engine bay.
I thought it might be detonation, at first, but after a week the car's still driving fine and it would be really weird to have detonation just because of an aftermarket motor mount and/or shifter bushings. I'm thinking it could be something loose and rattling, too, but I don't see that correlates to hearing it only in severe vacuum or in boost.
So I'm thinking it's a leak. I checked the engine bay and I see that there is one vacuum line that is cracked at the opening - see attached picture - and this one is located behind the middle of the intake manifold (does anyone know what size the vacuum hose is, so I can buy a replacement?). I haven't looked closely at all of them though. Also, I tried flooring it in 2nd, and it would spike to 6.0 and then drop quickly to 5.5; I'm pretty sure (but not 100% positive) that I used to boost 6.5 but I know how it fluctuates from car to car.
Edit: Looks like Hosetechniques is having a 25% off sale! Question is, I heard that the lines (for the Protege kit) don't really fit ours that well. What're your recommendations?
Attachments
Last edited:
