2 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH996/986 loud "buzz saw" sound at front with solution
Reported or suspected cause
fuel pump
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that report identifying a cause
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Reported cause · Original poster
On further investigation, it turned out to be the fuel pump.
996/986 loud "buzz saw" sound at front with solution
Frequently discussed work
Disconnect two quick-connect fuel lines
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
the battery, the battery tray, the various quick connect hoses and electrical plugs on the top of the fuel tank, remove the retaining ring, carefully remove the fuel level sensor (and disconnect two quick-connect fuel lines from the pump and one electrical connector, then reach in and twist the fuel pump counter-clockwise to disconnect it from the mount at the bottom of the tank.
996/986 loud "buzz saw" sound at front with solution
Read full discussion summary
Leading evidence: 'fuel pump' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'fuel pump' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Disconnect two quick-connect fuel lines' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed · Original poster
It was remarkable that the car even ran with the pump falling apart like this.
996/986 loud "buzz saw" sound at front with solution
Disconnect two quick-connect fuel lines
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
the battery, the battery tray, the various quick connect hoses and electrical plugs on the top of the fuel tank, remove the retaining ring, carefully remove the fuel level sensor (and disconnect two quick-connect fuel lines from the pump and one electrical connector, then reach in and twist the fuel pump counter-clockwise to disconnect it from the mount at the bottom of the tank.
996/986 loud "buzz saw" sound at front with solution
Test of the broken pump
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
Last video is of a test of the broken pump to illustrate the sound it was making
996/986 loud "buzz saw" sound at front with solution
Frequently discussed actions (3)
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Disconnect two quick-connect fuel lines
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
the battery, the battery tray, the various quick connect hoses and electrical plugs on the top of the fuel tank, remove the retaining ring, carefully remove the fuel level sensor (and disconnect two quick-connect fuel lines from the pump and one electrical connector, then reach in and twist the fuel pump counter-clockwise to disconnect it from the mount at the bottom of the tank.
996/986 loud "buzz saw" sound at front with solution
Coverage and how to read this overview
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
2 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261027T184158Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hello everyone,
I had an interesting situation recently with a client bringing in a 1999 Carrera cabriolet with a very loud whine or buzz saw like sound coming from the front of the car. This occurred while idling or when revving the engine and troubleshooting showed it was not any of the fans, the EVAP/charcoal filter system or any other observable system. On further investigation, it turned out to be the fuel pump. Other related details are that the pump sound was most pronounced at less than 1/2 tank of fuel and despite the sound, the car ran normally and fuel pressure was still in the normal range. Upon extracting the fuel pump (located inside the fuel tank), it fell apart into several pieces, mainly due to the failure of the three screw attachment points that hold the assembly together. It was remarkable that the car even ran with the pump falling apart like this.
The videos and photos below are meant to help someone in the future with a similar problem identify the issue and get to a fix quickly. The basic steps are to remove the front compartment plastic cover panels. the battery, the battery tray, the various quick connect hoses and electrical plugs on the top of the fuel tank, remove the retaining ring, carefully remove the fuel level sensor (and disconnect two quick-connect fuel lines from the pump and one electrical connector, then reach in and twist the fuel pump counter-clockwise to disconnect it from the mount at the bottom of the tank. Reassembly is the reverse, but be careful when installing the fuel level sensor to ensure the fuel lines from the fuel pump do not interfere with the level sensor arm.
Hope this helps someone with a similar issue!
checkout more on Instagram at #joeslastchangegarage
First video is what the car sounded like when it arrived
Next set of photos show the removal process of the fuel pump and what the pump looked like when removed (broken into pieces)
Last video is of a test of the broken pump to illustrate the sound it was making
After removing the battery tray, this is what you see
Retaining ring, fuel level sensor removed and looking into the tank
Battery tray, fuel level sensor and rubber gasket
Draining the fuel tank
Here's what the pump looked like when removed ... it fell to pieces
This shows the three main screw mounts that broke ... this is why the assembly fell apart
New Fuel pump ready to install
New fuel pump installed at bottom of tank
Great “how to”!
there is a special tool to remove the retaining ring. I’m sure you have one. But, was just letting others know.
If you are tool junkie like me then you just have to have one “just in case”
This is a source reference. Confirm exact model applicability in the original material.
