rebuild, in low boost, chattering metal/ceramic sound? WTF?
10-08-02, 02:21 PM
#1
what 7
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rebuild, in low boost, chattering metal/ceramic sound? WTF?
Well, I just got my rebuild in a couple weekends ago, and turned over 1000 miles. I have started giving it 1 or 2 psi just to feel the power. 
Anyways, I seem to be getting a similar sound to detonation at anything above 2 psi. It doesn't sound as LOUD as my last bout with detonation, but very similar.
I just got my injectors back from Marren Fuel Injection. I have an upgraded fuel pump, rewired too. The motor has a streetport, TB mod, TID mod, and I ported the wastegate and turbo inlet like on RETed's site. My turbo is now spitting oil and I have a good amount of shaft play. One of my friends asked if maybe my compressor was rubbing on the compressor housing. The sound doesn't have a rythem, but it gets louder with more boost.
The last time I had detonation, it was because my boost sensor signal wasn't getting to the ECU, so I rewired it. I'm going to check it this afternoon, after I take a test.
Any other suggestions?
Anyways, I seem to be getting a similar sound to detonation at anything above 2 psi. It doesn't sound as LOUD as my last bout with detonation, but very similar. I just got my injectors back from Marren Fuel Injection. I have an upgraded fuel pump, rewired too. The motor has a streetport, TB mod, TID mod, and I ported the wastegate and turbo inlet like on RETed's site. My turbo is now spitting oil and I have a good amount of shaft play. One of my friends asked if maybe my compressor was rubbing on the compressor housing. The sound doesn't have a rythem, but it gets louder with more boost.
The last time I had detonation, it was because my boost sensor signal wasn't getting to the ECU, so I rewired it. I'm going to check it this afternoon, after I take a test.
Any other suggestions?
10-08-02, 03:31 PM
#3
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have you checked the timing?
mike
mike
10-08-02, 05:29 PM
#4
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Yeah, I wish they were crossed, but they aren't, unless L doesn't go on the bottom plugs and T doesn't go on the top. I may be losing my sanity? I switched em for the helluvit, and the car ran about the same. I got the same noise though, so it must be detonation :o
I set my timing a few days ago dead on the yellow mark to pin to leading coil. It was at about 800 rpms.
I set my timing a few days ago dead on the yellow mark to pin to leading coil. It was at about 800 rpms.
10-08-02, 05:34 PM
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Originally posted by Piranha
Yeah, I wish they were crossed, but they aren't, unless L doesn't go on the bottom plugs and T doesn't go on the top. I may be losing my sanity? I switched em for the helluvit, and the car ran about the same. I got the same noise though, so it must be detonation :o
I set my timing a few days ago dead on the yellow mark to pin to leading coil. It was at about 800 rpms.
Yeah, I wish they were crossed, but they aren't, unless L doesn't go on the bottom plugs and T doesn't go on the top. I may be losing my sanity? I switched em for the helluvit, and the car ran about the same. I got the same noise though, so it must be detonation :o
I set my timing a few days ago dead on the yellow mark to pin to leading coil. It was at about 800 rpms.
10-09-02, 01:54 PM
#7
what 7
Thread Starter
Okay... heres another clue. When the engine is cold (not THAT cold...) and I rev the engine from 2K to 3K somewhat quickly, I hear the chirp sound that is... Detonation. To me, this all seems to point to timing. But I set it with a timing light, the way one is supposed to. Argh...
Mike
Mike
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