Engine Knock
Thread Starter
Melting Slicks
Joined: Oct 2001
Posts: 2,561
Likes: 162
From: Louisville KY
2020 Corvette of the Year Finalist (performance mods)
C6 of Year Winner (performance mods) 2019
Engine Knock
Today was the first time I ever heard my engine knock. :eek: I keep 93 octane in it, so I was racking my brain why it was knocking. It could be only heard intermittently during hard acceleration. After wondering if I should get the engine analyzed I realized it was about 90 degrees outside. Anyone think thats the problem?
Melting Slicks
Joined: Mar 2002
Posts: 2,931
Likes: 2
From: Tx
Re: Engine Knock (pjazz)
Higher temps will make it worse! Try a few more tanks of gas or some octain boost and see if it goes away. If it's still there, you may need to tune for more fule in PE mode.
I've also heard that new plugs can help! Not sure if this is true.
[Modified by QuickSilver2002, 6:52 AM 6/11/2002]
I've also heard that new plugs can help! Not sure if this is true.
[Modified by QuickSilver2002, 6:52 AM 6/11/2002]
Drifting
Joined: Dec 2000
Posts: 1,516
Likes: 0
From: Shelton CT
Cruise-In II Veteran
Re: Engine Knock (pjazz)
Hi there,
There are a few different reprogrammings for the computers for spark knock issues.
Also, there is some revised diagnostics for the condition.
There is a newer bulletin, however, it is if there is a check engine light.
I would take the car in, and have it checked.
Besttoyou, c4c5
There are a few different reprogrammings for the computers for spark knock issues.
Also, there is some revised diagnostics for the condition.
There is a newer bulletin, however, it is if there is a check engine light.
I would take the car in, and have it checked.
Besttoyou, c4c5
Melting Slicks
Joined: Nov 2001
Posts: 3,088
Likes: 1
From: NC
Re: Engine Knock (c4c5specialist)
c4c5specialist
Question:
Is there a definitive test or procedure to determine the presence
of psiton slap? Several times to my dealer and some tell me they
hear the noise and others don't. The last visit the service manager
says "That's a can of worms you might not want to open."
Okay, that's may be right, but after 9000 miles, I'm getting tired
of hearing this noise. And it doesn't really go away. It may minimize
depending on the temp but is always evident, at least to me and my GF.
I was at a show last weekend and heard a dozen (all years)
c5's and not one had the similar noise, slap, knock...Whatever.
Though I don't really want my engined torn apart, but I would rather get to
bottom of it and fix it. Again, my original question...Is there a real test or
is it merely subjective.
Any help...GeorgeC
:confused:
Question:
Is there a definitive test or procedure to determine the presence
of psiton slap? Several times to my dealer and some tell me they
hear the noise and others don't. The last visit the service manager
says "That's a can of worms you might not want to open."
Okay, that's may be right, but after 9000 miles, I'm getting tired
of hearing this noise. And it doesn't really go away. It may minimize
depending on the temp but is always evident, at least to me and my GF.
I was at a show last weekend and heard a dozen (all years)
c5's and not one had the similar noise, slap, knock...Whatever.
Though I don't really want my engined torn apart, but I would rather get to
bottom of it and fix it. Again, my original question...Is there a real test or
is it merely subjective.
Any help...GeorgeC
:confused:
