weird tapping after throttle is dropped lifters tapping
Thread Starter
Banned
Joined: Jan 2008
Posts: 121
Likes: 0
From: Las Vegas
weird tapping after throttle is dropped lifters tapping SO i can hear what I know too be lifter tapping same thing happened too my uncles SS Truck had the lifters swaped out twice .. could it be the Oem PArts ??is it wise too put the ls6 camshaft in a ls1 ?? Any suggestions on quality lifter parts ? anybody else kno what im talkin
g about ??>?
g about ??>? Thread Starter
Banned
Joined: Jan 2008
Posts: 121
Likes: 0
From: Las Vegas
So0o i Get off the phone with a good friend and i am told that pre dentintion could be the case in which im hearing a tapping after the throttle is relesed (pinginG) how the hell do i stop this mix 100 octane in my tank with the current gas i have ???????
Last edited by un17real; Feb 12, 2008 at 02:15 PM.
first, what modifications have you done to your motor?
second, what is the temperature of the weather where you are at, out of curiousity?
third, explain how you were driving the car, ie, racing, hard, spirited, and for how long before you start hearing these "tapping" sounds?
Pre-detonation will destroy your motor, however your computer is designed to pull timing to compensate for poor fuel or detonation issues. i suppose if you wanted to check and see if the problem was detonation or not, you could try picking up some higher octane fuel and mix it half and half with premium to see if your pinging goes away. if you had someone with a diagnostic computer or efi-live, HP-tuners, etc. etc. or just a data-logger that can read the computer, that would tell you if your knock sensors are picking up detonation.
second, what is the temperature of the weather where you are at, out of curiousity?
third, explain how you were driving the car, ie, racing, hard, spirited, and for how long before you start hearing these "tapping" sounds?
Pre-detonation will destroy your motor, however your computer is designed to pull timing to compensate for poor fuel or detonation issues. i suppose if you wanted to check and see if the problem was detonation or not, you could try picking up some higher octane fuel and mix it half and half with premium to see if your pinging goes away. if you had someone with a diagnostic computer or efi-live, HP-tuners, etc. etc. or just a data-logger that can read the computer, that would tell you if your knock sensors are picking up detonation.
Last edited by nine-eight; Feb 12, 2008 at 02:26 PM.
Ive got the same sound (ping).
Happens Only under full throttle, and only past 4000rpm.
99 TA 150km's with;
Just got a custom tune done (obviously didnt solve problem)
LS6 intake
Wisper Lid
Ported Throttle body
New 180* thermo (stock was 195)
TR55's are about 1yr old
MSD wires are 2 yrs old
Coils -stock origional
91-94 octane.
Cleanned Mass air sensor with Throttle body cleaner spray.
SeaFoamed using vacuum hose tecnique.
Had injectors cleanned at dealership.
Here's another thing: I had a diablo sport Predator Tuner, with it I tried the following; Added 10% more fuel - no change.
Retarded all the timing possible -no change.
Fan On temps I believe are at 200*on
Everything else is stock.
I think Im gonna check the timing chain and replace it with a LS2 versoin and try that before the heads come off.
Any other ideas? I have checked everything it seems.
Happens Only under full throttle, and only past 4000rpm.
99 TA 150km's with;
Just got a custom tune done (obviously didnt solve problem)
LS6 intake
Wisper Lid
Ported Throttle body
New 180* thermo (stock was 195)
TR55's are about 1yr old
MSD wires are 2 yrs old
Coils -stock origional
91-94 octane.
Cleanned Mass air sensor with Throttle body cleaner spray.
SeaFoamed using vacuum hose tecnique.
Had injectors cleanned at dealership.
Here's another thing: I had a diablo sport Predator Tuner, with it I tried the following; Added 10% more fuel - no change.
Retarded all the timing possible -no change.
Fan On temps I believe are at 200*on
Everything else is stock.
I think Im gonna check the timing chain and replace it with a LS2 versoin and try that before the heads come off.
Any other ideas? I have checked everything it seems.
