Welcome to the Corvette Forums at the Corvette Action Center!

Popping noise from the exhaust at tickover.

A

ashy22

Guest
Hi all
I wonder if you guys have come across this one.
When my 1971 454 LS5 corvette is sat there idling on tickover I get this popping noise every now and then from the exhaust as though something is missing. Is it an electrical problem or carb?
No problem under acceleration or at constant speed - just at tickover.

Any ideas?
Cheers
Paul :0)
 
A

ashy22

Guest
By tickover I mean at idle speed say 800rpm
Is "tickover" an English (UK) expression?
Cheers
Paul
 

Ken

Gone but not forgotten
Joined
Jan 30, 2001
Messages
8,236
Location
Hermosa Beach, CA
Corvette
1987 Z51 Silver Coupe
ashy22 said:
Is "tickover" an English (UK) expression?

I guess so Paul, I sure never heard of it! But as usual, if you give it some thought it makes sense (sorta). :L

_ken :w
 

69MyWay

Well-known member
Joined
Jul 3, 2001
Messages
4,364
Location
Auburndale, Florida
Corvette
1969 Killer Shark
Okay, so at idle it has a steady pop, pop, pop, coming out of the exhaust?

I would guess you are dead missing on one or more cylinders.

How old are the spark plugs? Are your plug wires fairly new, and fresh?

You may have a plug that is not as hot as the others, and it is skipping and sputtering at low RPM and votage levels.

I would suggest checking that, and at least checking the gap on the plugs.
 
B

Big Fish

Guest
maybe unburned fuel accumulating in the exhaust and detonating? If so, cause could be a "heavy" float, rich mixture adjustment, internal carb leakage, etc.
 

Jack

Well-known member
Joined
Dec 27, 2000
Messages
1,825
Location
Florence, SC (Timmonsville SC)
Corvette
71 War Bonnet Yellow VERT 71 BH Blue CPE (SOLD)
Paul:
I agree with all the others' suggestions ... take a look at ignition first ... then fuel/carb. I have also witnessed a pal chase a miss in a 350 V8 Suburban ... ignition, fuel etc. Turned out that two lobes on camshaft were worn ... fresh wires, plugs & carb were nice but didn't fix ... new cam & lifters did. Again ... start with ignition first ... then fuel/carb ... lastly lifters/cam.
JACK:gap
 
U

UKPaul

Guest
Hi Paul,
A popping sound (almost like it's missing) on tick over ;) could quite simply be an over rich idle mixture. Has it always done it, or did it start doing it after some mods/service/etc?
Paul
 
A

ashy22

Guest
Yes, it has always done it to a degree. It pops intermittently, with the odd one louder than the others. It comes from the passenger side exhaust.
Thanks for all the help - I will investigate further.
:0)
 
S

Shadowing1985v

Guest
maybe its back firing,, out of your exhaust

i had mine do that,,,
 

Corvette Forums

Not a member of the Corvette Action Center?  Join now!  It's free!

Help support the Corvette Action Center!

Supporting Vendors

Dealers:

MacMulkin Chevrolet - The Second Largest Corvette Dealer in the Country!

Parts/Accessories:

Vetteskins

Advertise with the Corvette Action Center!

Double Your Chances!

Partners

Top Bottom