Engine concerns - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

HeyZeus · 02-01-2023, 06:17 PM

So the last few days, I’ve heard a tapping noise coming from my engine, and it speeds up as I accelerate. I’m experiencing occasional lag and a knock when idle. I’m thinking either a misfiring cylinder or maybe the MAF sensor. Any pointers on what I should do until I can get it into the mechanic? I don’t want to blow my engine up but have no backup car for work

Valkyrie14 · 02-01-2023, 06:31 PM

Might be a lifter. Take a long screwdriver and put the tip on your valve cover over each cylinder, and your ear on the handle of the screwdriver. If it is a lifter is should be pretty loud when you are over it.

PhantomBlack · 02-02-2023, 11:35 AM

When I bought my camaro it had a tapping noise coming from the engine that also speed up when I accelerate. I wasn't concerned because I was throwing a cam in it. I thought it was a lifter, but in my situation it turned out the needle bearings from a few rocker arms fell out. I put 10,000 miles on the car with it being like that before I fixed it. Of course your situation may be different. I'm hoping it's not valvetrain related since this is your daily. No check engine light I assume?

HeyZeus · 02-02-2023, 01:26 PM

There was briefly for about 30 seconds and then it disappeared the rest of the drive. I’m going to put my code reader on it tonight and take it for a drive to see if anything comes up

FasNuf · 02-02-2023, 02:56 PM

You said it speeds up as the car accelerates. Does it still make noise with the engine running but the car stopped? I guess we're assuming it's the engine but...

HeyZeus · 02-02-2023, 03:25 PM

The noise is very slow at idle, there is more of a full vehicle knock that you can physically feel.

gtstorey · 02-02-2023, 03:32 PM

Mileage? Modifications?

HeyZeus · 02-02-2023, 08:45 PM

193k, CAI, axle back exhaust otherwise stock

gtstorey · 02-02-2023, 09:01 PM

Check engine lit? Enough misfire to really fill will typically throw a code. With that mileage it could be rod nock or a bad lifter. Next to impossible to diagnose a noise without hearing in person though. Anything we suggest based on your description is pretty much just a guess.

No reason to expect the MAF.

morepowerjoe · 02-03-2023, 05:32 AM

Is there anyway that you can post a video of it?

02-01-2023, 06:17 PM	#1
HeyZeus Drives: 2010 Chevrolet Camaro 2SS RS Join Date: Jan 2020 Location: South Carolina Posts: 62	Engine concerns So the last few days, I’ve heard a tapping noise coming from my engine, and it speeds up as I accelerate. I’m experiencing occasional lag and a knock when idle. I’m thinking either a misfiring cylinder or maybe the MAF sensor. Any pointers on what I should do until I can get it into the mechanic? I don’t want to blow my engine up but have no backup car for work

02-01-2023, 06:31 PM	#2
Valkyrie14 Valkyrie14 Drives: Chevrolet Camaro SS Join Date: Mar 2020 Location: Eau Claire, Wisconsin Posts: 962	Might be a lifter. Take a long screwdriver and put the tip on your valve cover over each cylinder, and your ear on the handle of the screwdriver. If it is a lifter is should be pretty loud when you are over it. __________________ 2014 SS LS3/LSA Supercharger, 10% Super Damper, 2.55 upper, AGP Dual Pump, ID 1050 injectors, Pegasus solid rear cradle bushings, LT Headers, Roto-Fab CAI, Elite E2 catch can, E85 corn fed, 160 Thermostat, Monster Twin Disk, MGW Short Throw shifter, Tick Clutch Master Cylinder, HP Tuners, JL Audio system.

02-02-2023, 11:35 AM	#3
PhantomBlack Drives: 2014 Camaro 2SS Join Date: Oct 2017 Location: Brooksville, FL Posts: 181	When I bought my camaro it had a tapping noise coming from the engine that also speed up when I accelerate. I wasn't concerned because I was throwing a cam in it. I thought it was a lifter, but in my situation it turned out the needle bearings from a few rocker arms fell out. I put 10,000 miles on the car with it being like that before I fixed it. Of course your situation may be different. I'm hoping it's not valvetrain related since this is your daily. No check engine light I assume? __________________ Mods: GPI SS1 VVT cam, TSP long tube headers, LSA conversion, ZL1 fuel pump, ADM FPCM, DW 700cc injectors, Lingenfelter solid isolator, Dedicated Motorsports ZL1 reinforced brick, ADM Griptech 2.5 pulley, JLT CAI, Phastek intake scoop, NPP cat-back, GM 3.91 gears, Eaton Truetrac, Tuned by Chris @ CHenry Motorsports.

02-02-2023, 02:56 PM	#5
FasNuf Drives: 2014 Camaro ZL1 Join Date: Jul 2019 Location: Oregon Posts: 1,617 View My Garage	You said it speeds up as the car accelerates. Does it still make noise with the engine running but the car stopped? I guess we're assuming it's the engine but... __________________ . . . . https://www.youtube.com/channel/UCgN...etl17hA/videos

02-03-2023, 05:32 AM	#10
morepowerjoe Drives: 2012 Chevrolet Camaro l99 Join Date: Aug 2020 Location: Austin, TX Posts: 2,105	Is there anyway that you can post a video of it? __________________ DSS FX Forged Pistons, Eagle ESP L19 Forged Rods, ARP Head and Main Studs, TSP PRC 260 CNC Ported Heads milled .030, Cometic .040 Head Gaskets, GPI SS3 VVT Camshaft, GM Performance Racing Lifters, CHE Trunnions , Molly Pushrods, Melling 10355HV Oil Pump, Cold Air Inductions CAI, Fast LSXR Intake Manifold, Nick Williams 103 TB, TSP 1 7/8" Longtubes with 3" TSP Exhaust, ZL1 Fuel Pump, Mishimoto Radiator, Mishimoto Oil Cooler, Tru Cool 40k Tranny Cooler, 3600 Circle D Converter, Fluid Dynamics Balancer Build Thread https://www.camaro5.com/forums/showthread.php?t=609817

02-02-2023, 01:26 PM	#4
HeyZeus Drives: 2010 Chevrolet Camaro 2SS RS Join Date: Jan 2020 Location: South Carolina Posts: 62	There was briefly for about 30 seconds and then it disappeared the rest of the drive. I’m going to put my code reader on it tonight and take it for a drive to see if anything comes up

02-02-2023, 03:25 PM	#6
HeyZeus Drives: 2010 Chevrolet Camaro 2SS RS Join Date: Jan 2020 Location: South Carolina Posts: 62	The noise is very slow at idle, there is more of a full vehicle knock that you can physically feel.

02-02-2023, 03:32 PM	#7
gtstorey Drives: 2010 Camaro SS2,L99, LSA SC Join Date: Aug 2017 Location: Huntsville, AL Posts: 2,155	Mileage? Modifications?

02-02-2023, 08:45 PM	#8
HeyZeus Drives: 2010 Chevrolet Camaro 2SS RS Join Date: Jan 2020 Location: South Carolina Posts: 62	193k, CAI, axle back exhaust otherwise stock

02-02-2023, 09:01 PM	#9
gtstorey Drives: 2010 Camaro SS2,L99, LSA SC Join Date: Aug 2017 Location: Huntsville, AL Posts: 2,155	Check engine lit? Enough misfire to really fill will typically throw a code. With that mileage it could be rod nock or a bad lifter. Next to impossible to diagnose a noise without hearing in person though. Anything we suggest based on your description is pretty much just a guess. No reason to expect the MAF.