Ziggy1024

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Ziggy1024 last won the day on February 20

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About Ziggy1024

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  • First Name
    Jon
  • Lexus Model
    GS450h
  • Year of Lexus
    2010
  • UK/Ireland Location
    Hampshire

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  1. I suspect you're right - it's just the memory of having to do the job twice on the Jag (second time in the dark and the rain!) that makes me hesitate! You're right though; 'you get what you pay for' just isn't always true these days... We had a 7 seat 626 back in the day - a 1990 626 'GT'. My old man had another 626 before that too - 1985 'lx' in blue with blue velour interior. 😎
  2. Thanks John. So you've tried the non-name-brand ones then? They are certainly tempting at that price, but do they last more than 5 minutes? Bad memories of fitting cheap pattern wheel bearings on my XJ6 a few years ago...
  3. Hopefully an easy one for someone - 3rd gen GS (mines a 2010 450h) front hubs: Are they all the same? I.e. gs300,430,450h etc.? Are NSF and OSF actually the same part? Are they the same as on the IS too? Just trying to find out what I'm looking for! Cheers all.
  4. Proof that the spanner fits: @Farqui Yes, I decided that as it seems nobody else has ever seen one go wrong, a used one would be a safe enough bet! I believe a lot of GR-engined cars (is250, gs300 etc.) use the same pump, but as I didn't find definitive proof on that, mine came from another 450h!
  5. So without wanting to count too many chickens just yet... The HP fuel pump is easy to replace. Lexus quoted 1.3 hours which I guess is fair enough as everyone needs a tea break at some point (I don't actually have any complaint about their estimate - I understand what they need to cover!). Remove the air hose from the throttle body, or you can't get at some of the below - 10mm for the jubilee clip 2x 12mm nuts (pump flange to top end of engine) - no access problems for those, but you'll need a deep socket and an extension. 2x E8 studs - there is other pipework in the way if you try to remove the pump without taking the studs out 19mm spanner for the fuel connection closest to the back of the engine. You can get a spanner on there with enough clearance to turn it - persevere! Spring clip on the small fuel hose, quick (squeeze!) release on the remaining one and one electrical connector Total about an hour including getting tools out, 'help' from a 7-year old and tidying up afterwards. And yes, it seems to be working so far. 😎
  6. I was only joking @Farqui ! I'm pretty sure that the issue is with the HP side. Dealer had identified the same candidates as Chris @Mihanicos above, but as far as I can tell concluded that the pump was more likely than the valve/relay based on previous experience. Swapping the pump doesn't look too difficult (quoted at 1.3h labour) so given that I should be able to get a used one easily enough, I'm tempted to give that a go...
  7. Oi, @Farqui ! Whatya doing, 'liking' my misfortune?! 🤣
  8. @Mihanicos Chris, Lexus have come back as saying it's the HP fuel pump. I've not got their reasoning yet (and I'll do whatever I can to confirm it as per your recommendations above), but my initial thought is that I'll source a used one - they don't seem a common failure so at least they should be available and relatively affordable... Any thoughts? Next task is to research compatibility between years, or even other models.
  9. Thanks again Chris! I've actually just left the car with Lexus for a pre-arranged appointment (on another issue that they've been trying to resolve since the car was covered by the extended warranty!) - having a courtesy car for tomorrow will save me a lot of hassle, so I didn't want to cancel that. Clearly they'll have a look at this issue too, but if/when they want to start randomly replacing expensive parts, I'll get stuck back into your suggestions... Cheers, Jon
  10. Is the 'fuel press' (kPag) that I've seen in techstream actually the low side reading?
  11. Thank you Chris! I can stop looking at the low pressure side at least, and looking for leaks is something I can manage! I do have techstream, although I'm definitely not an expert at using it yet... Are there some specific tests you'd run?
  12. So who knows anything about what I should expect to see in the way of fuel pressure? According to techstream, "Fuel Press" (kPag) is <200 when running, but when the engine (and fuel pump) shut itself off (after the hybrid battery charged sufficiently), the value started gradually climbing. It went as far as 5200 after about 6 minutes, then started dropping again... Is this increase normal, explained by e.g. heat soak into the now-stationary fuel at the rail, or is it potentially a sign that the sensor is playing up? What should fuel pressure be with the engine running? Anyone else who could take a look at what their car (any 6-cyl GS/IS I guess) would be a hero!
  13. The pump's under the seat - the filter is buried inside the pump assembly...
  14. Well if nothing else, I've ascertained that changing the in-tank pump would take about 10 minutes! Popped it out for a look - hard to tell without dismantling it completely, but what I can see of the filter in the bottom looks fine, and the inside of the tank certainly looks clean. No great surprise given that the car's only done 60,000 miles, mind...
  15. Yes, I appreciated that's what you meant - I just don't know how to go about testing it! Does anyone have any reference fuel pressures? What should I be seeing? WRT the number of pumps, there's also the high pressure pump (you might call it something else?) in the engine bay - I think (correct me, anyone?!) the engine can run on direct or port injection depending on circumstances, and wondered whether the problem could therefore be with whichever of those systems isn't used under light load. E.G: is the high pressure pump only used for the direct injectors?