dr_mat
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Everything posted by dr_mat
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Jeez, take some happy pills Kev. I was only asking cos I didn't know the answer! I'd never assumed the main throttle butterfly was totally air-tight, but that it was more or less closed. I'd assumed the ISV's role was to totally control the idle airflow, which it does using it's own solenoid-activated valve. Was I wrong?
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is that true? SOURCE or LINK please . . . .[/quote:4b09d] You haven't noticed it? My VR does it. Mate's 328i does it. Every car I've ever seen started from cold smells of fuel for a short while (to varying degrees). You try walking off a business park in the afternoon. Every big executive saloon that comes past whiffs of petrol.. And it's obvious from the MPG calculations that it's heinously inefficient from cold starts. This is a well known truism.
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Every car with a large engine produces a certain amount of fuel smell when cold. It should be coming from the exhaust though .. There's massive overfuelling on cold starts, particularly with big older engines. Newer ones are better but still do it to some extent.
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Thought the ISV bypassed the main throttle butterfly. Or are you (not) saying that the Golf does it differently? When I stumble across a Golf throttle in my cupboard under the stairs I will indeed work it out for myself.
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What do you want, a .. medal? ;)
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How can a throttle body effect torque at idle? I though zero throttle = closed throttle?
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Cheers, Nick. :) Was good to natter to you about the motor too, not many people will put up with the sustained Corrado story for too long without looking at their watch ... :) Yeah, the alignment is well worth it, isn't it? Pity it went out so badly in the first place, but unfortunately with all the work Stealth (and others) have done on my suspension in the past, it looks like it wasn't possible to get everything spot on with the tools they had at the time..
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Nice one Nick. You had a busy Friday afternoon then! Did your cast/camber figures come out spot on then? My castor is out still, though it's the same both sides, and the only thing I can think of is the bottom ball joints position as culprit.
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Dinkus has the right point here: you can say what you like as long as you either a) state that you do not know any facts, and it's just rumour or hearsay or b) you actually had the experience first hand and therefore you recount it (without being too sensationalist, of course, this isn't the daily mail) :) .
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I've never heard anyone say it takes 4 hours to bleed a Corrado's braking system ... Maybe on the ultra-smart Mk4 ABS system, yes, but not a bog standard C VR6 job.
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00532 is 12V + voltage problems, iirc. You had a flat battery at some point?
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It's in the manual. The standard VR says 36/32 f/r. If your new tyres are the same WIDTH as standard then I don't believe you have any reason to vary these recommended pressures. And since the Corrado has a *good* chassis you will KNOW when the tyre pressures are right. It will feel poised, balanced and grippy and have good turn in. You start to lose that responsiveness and your front tyres are down a couple of PSI.
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I *think* this fault actually indicates an electrical failure in the valve's actuator, not a sticky valve as such. The stickiness of the valves doesn't get tested until you hit 10km/h from the first start, as do the mechanical operation of the wheel sensors and so on.
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standard 0-60 times... mines weird but good!
dr_mat replied to chris CORRADO's topic in General Car Chat
Bet they're not really 1 year old then ..! :) -
£100? hose kit = £75+VAT, leaving exactly £11.87 budget for fitting .. sounds like Mate's Rates to me!! :)
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Pity no-one built a proper rear-wheel-drive Corrado .. Perhaps I should get the spanners out and show you how it's all done... ;) (Mainly by loaning them to a mechanic and giving him lots of cash I would imagine :) )
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Hoses are application-specific, given that engine bays are all subtly different shapes. You MAY be lucky with something like the Galaxy VR6, but be very careful ...
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My VR pulled 155 at the wheels at Stealth, that was on a 201.1 bhp run. 50-ish bhp drivetrain losses seems high to me, but it's consistent with what everyone else is seeing, so your 140 may not be wildly wrong ..
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What size are your buckets ffs?! Didnt mention bucket. :roll: I should not have to be telling a qualified doctor to reread the post carefully. :wink: LOL, and your speedlines^wsolitudes are immune from an attack of pedantry I assume.. ;) Anyway, most tyre places DO have a big wheel-sized bucket to look for leaks. And does it really matter!!
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I suspect that if you hold it at a constant 56 mph and reset the mpg computer you'll see it settle to about 35 mpg ...
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I've heard of a couple of people hear saying they have slow leaks due to corrosion around the inner rim where the tyre is supposed to sit. My old set included. But - I haven't heard of anyone who actually tested it in a bucket of water ..
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There's also the EGR valve on some LHD VRs, mainly in the US though I thought. Not sure whether this assembly might be related to that or not though - I've never seen an EGR on a Corrado!
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The old 12v VR has to read it's fuelling data from right by the catalyst, so that's a lot of time away from the cylinder, by comparison. Every few milliseconds helps when they're doing closed loop part throttle economy in the ECU. I mean, those MPG figures you're talking about would not have embarrassed a 1.6 carb engine from 20 years ago, and now we can do that with a 2.8!
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How many lambdas on the 24v? Where are they? BMW get big economy (for it's size) out of their big sixes by using lambdas VERY close to the cylinders, therefore giving much quicker reacting fuelling adjustment feedback. I'm sure my sticky brakes crippled my fuel economy, even on a run I rarely see an average greater than 32mpg...
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You can certainly use the ABS light (or lack of) as leverage cos that MOT certificate isn't legal if the ABS light didn't work when it was written out ..