910 reputation
1513
bio website
location Doha, Qatar
age 27
visits member for 3 years, 1 month
seen 13 hours ago

Mechanical engineer, DIY-enthusiast and owner/maintainer of a 1000+ BHP garage:

  • BMW M5 (E39, MY2000)
  • Chevrolet Lumina SS (MY2004) [ aka Pontiac GTO/Holden Monaro/Vauxhall Monaro ]
  • VW Touareg W12 (MY2006)

2d
comment A/C clutch turns on and off frequently
Well, 25 psi would be considered low for most applications. It should be around 50-60 psi at steady state (when the A/C has been running for some time)
Jul
26
comment A/C clutch turns on and off frequently
One possible reason for the clutch to disengage like that is to protect the compressor from surging. How confident are you that the amount of refrigerant in the system is correct? How much pressure are you seeing on the high side?
Jul
20
comment Why would turning on the A/C affect my alternator output voltage?
@Paulster2 : affirmative on your observation that it is battery voltage, not alternator output (I normally use the OBC secret menu to access battery voltage readout to check the alternator output, hence the confusion on my end :/ )
Jul
20
comment Why would turning on the A/C affect my alternator output voltage?
@Paulster2 : It looks like the rubber's given out since I can rotate the outer ring by hand without turning the inner part of the pulley.
Jul
18
comment Why would turning on the A/C affect my alternator output voltage?
@Paulster2 : Quick update. I popped the hood, started the engine and turned the A/C on. Initially both belts spun, then funny squeaking noises could be heard from (I think) the crank pulley. After about half a minute both belts stopped spinning along with the crank pulley. That explains why I was getting 12V output, but I'm surprised that the crank pulley stopped dead in its tracks even though the engine was turning over.
Jul
18
comment Why would turning on the A/C affect my alternator output voltage?
@Paulster2 : the absolute minimum RPM that the engine ticks over at is set to 650 RPM. The ECU never allows the RPM to drop below this value.
Jul
17
comment Why would turning on the A/C affect my alternator output voltage?
@Paulster2 : I'll have to check the RPM drop, but the issue persists regardless of fan speed. Engaging the A/C switch is enough to cause the voltage to drop.
Jul
17
comment Why would turning on the A/C affect my alternator output voltage?
@Larry, 2004 Chevrolet Lumina SS (aka Pontiac GTO)
Jul
17
asked Why would turning on the A/C affect my alternator output voltage?
Jul
14
comment 2002 VOLKSWAGEN GOLF CL 1.4 - No power for first 3 mins driving
This answer definitely needs elucidation. In the question you mentioned that the lambda sensor was initially thought to be the reason for the issue (and subsequently the issue persisted), yet now you say a new lambda sensor fixed the issue.
Jul
12
answered Car drives great but, after you shut off it won't crank for a few hours
Jul
10
comment What could be the reason and solution to a sudden drop in mileage?
Could you clarify what was done as part of the service?
Jul
10
comment Removing a Viscous Fan without the serpentine belt (1998 Land Rover Discovery)
@NickC : a screwdriver won't do, as you've discovered :) It might be worth it to modify an angle bracket.
Jul
10
revised Lancer 2007 vibrates at 60+ mph
edited title, body grammar
Jul
10
answered Removing a Viscous Fan without the serpentine belt (1998 Land Rover Discovery)
Jul
10
suggested suggested edit on Lancer 2007 vibrates at 60+ mph
Jul
9
comment Removing a Viscous Fan without the serpentine belt (1998 Land Rover Discovery)
Do you have a picture by any chance? If it is anything like my BMW, there may be a bolt head you can use for extra purchase
Jul
9
comment Can an O2 sensor cause faulty spark plugs on driver side only when the spark plugs were just changed?
You say that the O2 sensors tested good. How were they tested?
Jul
9
answered Volvo automatic windows won't stay closed
Jul
9
comment Volvo automatic windows won't stay closed
Many vehicles equipped with remote keys have a "hidden" feature in which the windows roll down when the unlock button is pressed for a few seconds. It may be that the unlock button is stuck and causes your windows to roll down. If this is the case, the windows should not roll down if you use a different, working remote or the existing remote is far away from the vehicle.