High Pressure Fuel Pump Tick- GM bulletin but does not include 2010 models
11-18-2012, 08:42 PM
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High Pressure Fuel Pump Tick- GM bulletin but does not include 2010 models
Recently I noticed a tick that I never heard before.
I could not hear it when it is in open loop but once has been running for a few minutes the idle drops and you could hear a loud tick every 1-1.5 seconds. I used a mechanic's stethoscope to confirm it was the high pressure fuel pump.
I took it to the dealer, and they said the tick is normal due to GM Bulletin #06-06-93-001G, which included 2008-2009 Cobalt SS/HHR SS.
A few days later I compared the tick with a 08 HHR SS with 30,000 more miles and the tick was less apparent.
Also the bulletin does not include 2010 models, Was the fuel pump changed in 2010?
Any guess why my tick is quieter than other models with more miles?
I could not hear it when it is in open loop but once has been running for a few minutes the idle drops and you could hear a loud tick every 1-1.5 seconds. I used a mechanic's stethoscope to confirm it was the high pressure fuel pump.
I took it to the dealer, and they said the tick is normal due to GM Bulletin #06-06-93-001G, which included 2008-2009 Cobalt SS/HHR SS.
A few days later I compared the tick with a 08 HHR SS with 30,000 more miles and the tick was less apparent.
Also the bulletin does not include 2010 models, Was the fuel pump changed in 2010?
Any guess why my tick is quieter than other models with more miles?
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armcclure (11-16-2018)
11-18-2012, 11:27 PM
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i think he's talking about this:
https://www.cobaltss.net/forums/reca...l-pump-287209/
I deal with GM Alot and haven't heard anything about the HPFP having a recall.
https://www.cobaltss.net/forums/reca...l-pump-287209/
I deal with GM Alot and haven't heard anything about the HPFP having a recall.
11-19-2012, 12:11 AM
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i freaked out the first time i herd my car do the same thing i posted vids and read up on it every one sead it was normal and a few ppl even sent me vids of there cars doing the same thing
there cars had about 15k and 35k my car has 73K
there cars had about 15k and 35k my car has 73K
11-19-2012, 01:42 AM
#13
The HHR you listened to may have had the HPFP noise cover in place.
I can't remember if mine came with one or if it was a service visit installed item, but at some point I ended up with a noise cover over my HPFP. I later took it off so I could get to stuff easier.
I can't remember if mine came with one or if it was a service visit installed item, but at some point I ended up with a noise cover over my HPFP. I later took it off so I could get to stuff easier.
11-19-2012, 11:22 PM
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i think he's talking about this:
https://www.cobaltss.net/forums/reca...l-pump-287209/
I deal with GM Alot and haven't heard anything about the HPFP having a recall.
https://www.cobaltss.net/forums/reca...l-pump-287209/
I deal with GM Alot and haven't heard anything about the HPFP having a recall.
11-26-2012, 09:42 PM
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Recently I noticed a tick that I never heard before.
I could not hear it when it is in open loop but once has been running for a few minutes the idle drops and you could hear a loud tick every 1-1.5 seconds. I used a mechanic's stethoscope to confirm it was the high pressure fuel pump.
I took it to the dealer, and they said the tick is normal due to GM Bulletin #06-06-93-001G, which included 2008-2009 Cobalt SS/HHR SS.
A few days later I compared the tick with a 08 HHR SS with 30,000 more miles and the tick was less apparent.
Also the bulletin does not include 2010 models, Was the fuel pump changed in 2010?
Any guess why my tick is quieter than other models with more miles?
I could not hear it when it is in open loop but once has been running for a few minutes the idle drops and you could hear a loud tick every 1-1.5 seconds. I used a mechanic's stethoscope to confirm it was the high pressure fuel pump.
I took it to the dealer, and they said the tick is normal due to GM Bulletin #06-06-93-001G, which included 2008-2009 Cobalt SS/HHR SS.
A few days later I compared the tick with a 08 HHR SS with 30,000 more miles and the tick was less apparent.
Also the bulletin does not include 2010 models, Was the fuel pump changed in 2010?
Any guess why my tick is quieter than other models with more miles?
11-16-2018, 04:27 PM
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11-16-2018, 04:34 PM
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Thread from the dead 
but the rubber cover he is talking about is actually a molded foam piece that goes over the pump. Lemme look up the gm part number real quick.
Edit: the part number is 12628069, you will remove the metal shield around the hpfp and this foam section is molded to fit on one way around the pump and lines. Then you put the metal shield back on. Gm calls it a insulator so when you look it up it may say insulator or silencer or cover depending where you buy it from.
This is about what it looks like
May look slightly different now, they use basically the same one on everything with the di ecotec after 2010.
but the rubber cover he is talking about is actually a molded foam piece that goes over the pump. Lemme look up the gm part number real quick.Edit: the part number is 12628069, you will remove the metal shield around the hpfp and this foam section is molded to fit on one way around the pump and lines. Then you put the metal shield back on. Gm calls it a insulator so when you look it up it may say insulator or silencer or cover depending where you buy it from.
This is about what it looks like
May look slightly different now, they use basically the same one on everything with the di ecotec after 2010.
Last edited by Kolt; 11-16-2018 at 04:40 PM.
11-16-2018, 06:01 PM
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Thread from the dead but the rubber cover he is talking about is actually a molded foam piece that goes over the pump. Lemme look up the gm part number real quick.
Edit: the part number is 12628069, you will remove the metal shield around the hpfp and this foam section is molded to fit on one way around the pump and lines. Then you put the metal shield back on. Gm calls it a insulator so when you look it up it may say insulator or silencer or cover depending where you buy it from.
This is about what it looks like
May look slightly different now, they use basically the same one on everything with the di ecotec after 2010.
but the rubber cover he is talking about is actually a molded foam piece that goes over the pump. Lemme look up the gm part number real quick.Edit: the part number is 12628069, you will remove the metal shield around the hpfp and this foam section is molded to fit on one way around the pump and lines. Then you put the metal shield back on. Gm calls it a insulator so when you look it up it may say insulator or silencer or cover depending where you buy it from.
This is about what it looks like
May look slightly different now, they use basically the same one on everything with the di ecotec after 2010.
EDIT: the two pumps are very different I will explore other options and possibly make my own.
Last edited by cynistersix; 11-16-2018 at 06:07 PM. Reason: Investigated my question
11-16-2018, 07:13 PM
#25
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Fuel pump part number for a lnf? There wasn't a bulletin for replacing the pump specifically for noise. What does a lf4 go into.