Myles Posted February 19, 2006 Share Posted February 19, 2006 I've been doing a 640-mile round-trip from the midlands to Edinburgh each w/e for the last couple of weeks. Last w/e, I checked the tintop tyre pressures and at a very low ambient temp (approx. freezing), I set them to the correct 32psi. One week later - and with a fairly heavily-laden car, I checked them again for the trip oop north. They were all down to 22-23psi!The ambient temp was probably around 7 deg C this time (so I'd expect something slightly higher than 32psi - especially given the increased vehicle load...) After finding the first one that low, I thought I must have had a puncture or similar - but they were all the same. All were pumped up by the same forecourt machine - and then checked with my digital tyre gauge - so there's nothing different in terms of how I filled or measured the pressures. What is/was going on? Project Scope-Creep is live... Alcester Racing 7's Equipe - 🙆🏻™ Alcester-Racing-Sevens.com Link to comment Share on other sites More sharing options...
Tom_C Posted February 19, 2006 Share Posted February 19, 2006 Is it a Ford with alloys Myles? Ford rims cam often not seal properly onto the tyres, causing this kind of thing. I had it intermittently on a Puma, and I know people who had the same on Escorts and early Focus models. Cheers Tom FH54WLX - only the car supports ManU, honest! Link to comment Share on other sites More sharing options...
Stijn LUYCK 1 Posted February 20, 2006 Share Posted February 20, 2006 >All were pumped up by the same forecourt machine - and then checked with my digital tyre >gauge - so there's nothing different in terms of how I filled or measured the pressures. So you must made 4 times the same mistake, doubt that all 4 wheels would have the same problem. It is not something silly like you held the guage upside down or so? I've been there before with indicators on a X-ray generator, 999 out of a thousand there is no problem reading them upside down and then once, being in a hurry or god knows why, suddenly your brain does not invert the numbers. Link to comment Share on other sites More sharing options...
Myles Posted February 20, 2006 Author Share Posted February 20, 2006 The forecourt machine is one where you set the pressure using a digital readout on the machine - and it then automatically fills to that pressure. The gauge I used to check the pressure is a simple digital gauge from Halfords - it is hard to mess it all up four times. The gauge read to within half a psi of the figure set on the machine - and that gives/gave me confidence. I am at a loss to explain it. If the pressure had gone *up* - then fine. The ambient temp was higher the second time round. Project Scope-Creep is live... Alcester Racing 7's Equipe - 🙆🏻™ Alcester-Racing-Sevens.com Link to comment Share on other sites More sharing options...
Myles Posted February 20, 2006 Author Share Posted February 20, 2006 IC where you are coming from with the inverted numbers bit though - bit of a coincidence that the pressure was close to that if I'd inverted the digits (23 instead of 32), but I'd have had to make the same mistake on the pump - and I only hold the gauge one way round so I always look at it from the same angle. Odd. Project Scope-Creep is live... Alcester Racing 7's Equipe - 🙆🏻™ Alcester-Racing-Sevens.com Link to comment Share on other sites More sharing options...
Phil Bishop Posted February 20, 2006 Share Posted February 20, 2006 Kids? Link to comment Share on other sites More sharing options...
Stijn LUYCK 1 Posted February 20, 2006 Share Posted February 20, 2006 Drinks? 😬 Link to comment Share on other sites More sharing options...
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