925 reputation
1513
bio website
location Doha, Qatar
age 27
visits member for 3 years, 2 months
seen 2 days 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)

Aug
14
comment Random Misfiring - Tried All Basic Fixes - Tech Says Engine Ground
How's your vacuum line? Is the rubber hose perished/cracked? The idle-hunting and hissing symptoms definitely make it sound like you have a vacuum leak.
Aug
13
comment What are possible causes for belt tensioner “chatter” at idle?
I can definitely sense that something is amiss with the throttle so the vacuum leak suggestion sounds like a good lead. It's like the throttle plate doesn't want to open as easily as it used to.
Aug
12
revised What are possible causes for belt tensioner “chatter” at idle?
perestroika; action plan added
Aug
12
revised What are possible causes for belt tensioner “chatter” at idle?
added 2 characters in body; edited title
Aug
12
revised What are possible causes for belt tensioner “chatter” at idle?
edited body
Aug
12
revised What are possible causes for belt tensioner “chatter” at idle?
added 39 characters in body
Aug
12
comment What are possible causes for belt tensioner “chatter” at idle?
I wish I could embed videos in the question itself.
Aug
12
comment What are possible causes for belt tensioner “chatter” at idle?
'04 Lumina SS, aka Pontiac GTO/Holden Monaro
Aug
12
revised What are possible causes for belt tensioner “chatter” at idle?
added 35 characters in body
Aug
12
asked What are possible causes for belt tensioner “chatter” at idle?
Aug
12
answered Why would turning on the A/C affect my alternator output voltage?
Aug
11
comment Can I use the same AFR sensor on both banks (bank 1 sensor 1 and bank 2 sensor 1)
AFR woes can be deceptive. If you're getting codes for both banks all of a sudden,b I'm inclined to believe that the issue lies elsewhere.
Aug
10
comment What is causing this terrible grinding/groaning noise when I come to a slow stop sometimes? (but not always!)
So I assume all's well since the brake & rotor replacement?
Aug
10
comment Toyota Hilux Surf 1998 Stuck in Park and speedometer and odometer not working
No, this brake switch is something else.
Aug
10
comment Toyota Hilux Surf 1998 Stuck in Park and speedometer and odometer not working
A malfunctioning brake switch can explain why the gear doesn't want to shift out of "P". This is the switch responsible for activating a solenoid in the gear shifter mechanism to release the parking lock.
Jul
28
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.