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Hi Guys, After over 10,000 trouble free miles in a Cobra replica we seem to have a problem with the master relay signal from the ECU. It is fluctuating between 3 and 12 volts which means that sometimes the relays driven by this signal work and sometimes they dont. Is this a common sign...

Whats wrong with the alternator? You can buy a diode set which is simplicity itself to fit for under £30 online. Have a look at http://www.woodauto.com/Component.aspx?Ref=RTF49893 Cheers, Tony

Sorry, i have no ideaof location as I've never had a Ford rack apart. As a second thought, have you got flow and return the right way around? Cheers, Tony

I dont know the pump pressure but as far as I am aware the rack should have a reed valve in it that controils the amount of pressure in the rack. So any excess pressure should just bleed off into the return line. Sounds to me like the reed valve is stuck. Cheers, Tony

Ah, no loom or ECU. I can see why you need an aftermarket one.:) Will you be using the standard lexus knock sensors with your ecu? i believe the standard ecu tune is very conservative so you may well free up some more power with a more aggressive tune. If you could use the standard knock...

Whats the fuel pressure from the mercedes pump ? As long as its not lower than the stock Lexus fuel pump you should be fine and you won't need an aftermarket fpr unless you are looking to up the power of the Lexus engine in which case I'd ask the tuner what he thinks. If you're not looking to...

Found the beggar. http://www.pistonheads.com/gassing/topic.asp?h=0&f=47&t=1095810&mid=39808&nmt=1st+Real+Project%3A+E30+BMW+4.0+V8 Cheers, Tony

Theres a guy on Pistonheads who's put an LS 400 engine and a Toyota manual box into a 3 series Touring. Forum Search isn't working over there or I'd have posted a link. Cheers, Tony

Alan, Could I pick your brains for a mo. What turbo's (and spec) are you using, and what power and torque are you expecting to achieve ? Cheers, Tony

Hi Jason, I'll get in touch after the weekend, and drop by after work one evening if thats ok. If you're robotics guy cannot sort out a system ATP Electronics at Cannock Wood Industrial Estate do a really neat flappy paddle auto gearbox controller that would work although its probably a bit...

Thanks for the advice, I'll get the bits together for when its through its IVA test, God knows when that will be though. Cheers, Tony

Thanks Rod, I take off the valve. I'll be putting a gravity/ shock activated cut off switch to disable engine and fuel pump electrics in case of accident etc. Re adding boost if I'm using bigger injectors will the standard fuel rail be able to cope with the increased fuel flow requirements...

After almost 4 years, two house moves, one house and garden rebuild, a change of job and multitudes of lifes hiccups I finally have my part built Lexus powered Cobra back in my garage, in my house, next to my beer fridge, and I can work on it again. The donor of the engine was a June 1990...

Sorry, Got to this one a bit late but we have reversed the accessory belt tension on two 1UZFE using the standard tesnioner. We stripped down the tensioner, tapped a new bolt hole in the central pivot stud and changed the orientation of the internal spring by drilling a new detent hole in...

Edited for maths and corrections

Hi Norm, Sent a load of stuff to you which should help. It takes a bit of time to get your head around the diagrams but its not too difficult once you get in the "zone". Sorry you were put off the Cobra Replica Club but its a fantastic resource and a great club. There's 1200 members and only...

You will need an oil cooler for the atf in the gearbox, although you may not need an oil cooler its easy enough to plumb in a thermostatically controlled remote cooler for the engine oil from the oil cooler plate. Its a shame the oil filter assembly has been removed from the block as this has a...

1UZfe into Cobra Hi, I don't know if we have already conversed by email, but I'm Tonyd from the UK Cobra club. What do you want to know? I've built two Lexus Cobras so far and the first one is coming up to three years old now ( 8000miles plus ) without a problem. Re cooling system, the...

IIRC we asked a local Lexus garage for the number of their technical helpline. It was about 4 years ago now but I'll dig around for the number amongst my notes and see if I can find it. Cheers, Tony

Lexus UK runs a technical help service which will give you the exact pinout/ wiring diagram for the ECU of the exact car you have, if you provide them with either the VIN or registration number. It'll cost a couple of quid ( 85 pence per sheet IIRC) and they can fax or email you the diagram...