with Vader86. Listen at the valve covers and to each injector to isolate the noise.
C4 ticking noise
Thread Starter
2nd Gear
Joined: Jan 2015
Posts: 2
Likes: 0
From: NY
C4 ticking noise
My C4 wasn't running because it wasn't getting power to the fuel pump (ended up being a fusible link). Now that I've fired it up there is a noticeable ticking noise coming from the engine compartment that wasn;t there before. The sound does not get louder when I open the oil filler cap, so I think it is an injector or my EGR. My brother and I think the sound is due to cranking the engine without gas in the system a few times. Does anyone have a similar experience or advice on how to find/fix the problem?
8th Gear
Joined: Oct 2014
Posts: 8
Likes: 0
From: las vegas nv
My C4 wasn't running because it wasn't getting power to the fuel pump (ended up being a fusible link). Now that I've fired it up there is a noticeable ticking noise coming from the engine compartment that wasn;t there before. The sound does not get louder when I open the oil filler cap, so I think it is an injector or my EGR. My brother and I think the sound is due to cranking the engine without gas in the system a few times. Does anyone have a similar experience or advice on how to find/fix the problem?
Team Owner
Joined: Sep 2001
Posts: 62,146
Likes: 1,730
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
I often got a persistent injector tick on my original engine. Are you sure you had not heard this before?
The only other thing I can recommend is to get an engine stethoscope and listen around the injectors and valve covers to pinpoint what it might be.
The only other thing I can recommend is to get an engine stethoscope and listen around the injectors and valve covers to pinpoint what it might be.
Intermediate
Joined: Feb 2013
Posts: 29
Likes: 3
From: San Antonio Texas
My C4 wasn't running because it wasn't getting power to the fuel pump (ended up being a fusible link). Now that I've fired it up there is a noticeable ticking noise coming from the engine compartment that wasn;t there before. The sound does not get louder when I open the oil filler cap, so I think it is an injector or my EGR. My brother and I think the sound is due to cranking the engine without gas in the system a few times. Does anyone have a similar experience or advice on how to find/fix the problem?
If so, I had a similar ticking noise on my '90. I had originally thought it was a lifter tick but it turned out to be an exhaust leak where the weld for the EGR pipe and passenger exhaust manifold met. Had to get an EGR pipe off a junked C4 and had to buy headers since no company is manufacturing OEM exhaust manifolds. Gotta love forced upgrades!
Oil Producer
Joined: Apr 2014
Posts: 9,368
Likes: 2,735
My C4 wasn't running because it wasn't getting power to the fuel pump (ended up being a fusible link). Now that I've fired it up there is a noticeable ticking noise coming from the engine compartment that wasn;t there before. The sound does not get louder when I open the oil filler cap, so I think it is an injector or my EGR. My brother and I think the sound is due to cranking the engine without gas in the system a few times. Does anyone have a similar experience or advice on how to find/fix the problem?
christian, i have an 85 and the injector noise is LOUD.
do this around your engine to zero in on your source for the noise.
its actually pretty cool to do. you will hear the tick...but when you put your "stethoscope" onto the part actually making the noise...it will be LOUD. Y used a normal screwdriver with a rubber handle. You don't need a monster like this. BE VERY CAREFUL there are moving things in there and you could get sucked in!
after doing this with a screwdriver, i bought a 5$ used mechanics stethoscope off craigslist. amazing how different things sound.
Last edited by VikingTrad3r; Jan 21, 2015 at 04:59 PM.
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Le Mans Master
Joined: Aug 2007
Posts: 8,735
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From: WV
Just unplug the injectors one at a time, if the noise stops you have pinpointed your loud injector, if the noise persists it's not an injector causing the noise....No need for stetoscopes or screwdrivers....
..WW
..WW
Last edited by WW7; Jan 24, 2015 at 09:54 AM.