LS1 Noise from Injectors
Thread Starter
Teching In
Joined: Oct 2024
Posts: 5
Likes: 2
LS1 Noise from Injectors I’m new to the Forum and am sure this has been addressed but I’m having trouble finding it. I just put Heads Cam and Lifters in my LS1
After driving for some time it developed a noise similar to lifters but not that metallic. Someone said it was my Injectors. The engine is out of a 2002 Firebird The heads and cam are from Trick Flow that included Harlan Sharp Roller Rockes. The injectors are Stock and came with the engine when I bought it ( it had ~ 40,000 miles) so I have not changed them. This noise also will go away for some time then come back I’m at a lost and with New Hearing Aids its Now Driving me Crazy
After driving for some time it developed a noise similar to lifters but not that metallic. Someone said it was my Injectors. The engine is out of a 2002 Firebird The heads and cam are from Trick Flow that included Harlan Sharp Roller Rockes. The injectors are Stock and came with the engine when I bought it ( it had ~ 40,000 miles) so I have not changed them. This noise also will go away for some time then come back I’m at a lost and with New Hearing Aids its Now Driving me Crazy
TECH Senior Member
Joined: Jun 2016
Posts: 22,295
Likes: 3,617
From: Central Cal.
Then are you sure it's the injectors making noise?
Did you measure for correct pushrods when you did the cam?
If your new cam has a smaller base circle, you do need longer pushrods.
Did you measure for correct pushrods when you did the cam?
If your new cam has a smaller base circle, you do need longer pushrods.
Thread Starter
Teching In
Joined: Oct 2024
Posts: 5
Likes: 2
The Head and Cam Kit came from Trick Flow and came with push rods that matched the base circle
every thing was fine, Great Performance No noise. It was after ~ 500:miles this started plus it comes and goes. If it were a lifter or cam lobe going bad it wouldn’t go away. Performance hasn’t been affected, still runs Great Just sounds like S@#T
not Sure what it is. Wondering if anyone has had Very Loud injectors. When I first fire it off cold it sounds like it’s sucking a lot of air then settles down once warm. I have a long tube from Air filter to throttle body. ~ 2 feet to get cooler air. Sorry for grasping at straws but I’m stumped on where to look
every thing was fine, Great Performance No noise. It was after ~ 500:miles this started plus it comes and goes. If it were a lifter or cam lobe going bad it wouldn’t go away. Performance hasn’t been affected, still runs Great Just sounds like S@#T
not Sure what it is. Wondering if anyone has had Very Loud injectors. When I first fire it off cold it sounds like it’s sucking a lot of air then settles down once warm. I have a long tube from Air filter to throttle body. ~ 2 feet to get cooler air. Sorry for grasping at straws but I’m stumped on where to look
Thread Starter
Teching In
Joined: Oct 2024
Posts: 5
Likes: 2
Also if I put my Stethoscope on each injector I do get one that sounds louder than the rest but not noticeable without
if I were to replace the injectors what’s the best to use. Also will I have to re tune ???
if I were to replace the injectors what’s the best to use. Also will I have to re tune ???
Last edited by Dsah; Oct 2, 2024 at 09:51 PM.
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The Head and Cam Kit came from Trick Flow and came with push rods that matched the base circle
every thing was fine, Great Performance No noise. It was after ~ 500:miles this started plus it comes and goes. If it were a lifter or cam lobe going bad it wouldn’t go away. Performance hasn’t been affected, still runs Great Just sounds like S@#T
not Sure what it is. Wondering if anyone has had Very Loud injectors. When I first fire it off cold it sounds like it’s sucking a lot of air then settles down once warm. I have a long tube from Air filter to throttle body. ~ 2 feet to get cooler air. Sorry for grasping at straws but I’m stumped on where to look
every thing was fine, Great Performance No noise. It was after ~ 500:miles this started plus it comes and goes. If it were a lifter or cam lobe going bad it wouldn’t go away. Performance hasn’t been affected, still runs Great Just sounds like S@#T
not Sure what it is. Wondering if anyone has had Very Loud injectors. When I first fire it off cold it sounds like it’s sucking a lot of air then settles down once warm. I have a long tube from Air filter to throttle body. ~ 2 feet to get cooler air. Sorry for grasping at straws but I’m stumped on where to look
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