Mud-club
Vehicle & Technical => Discovery => Topic started by: sub4x4 on February 23, 2007, 21:33:20
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hi guys .
any body got any ideas just changed from 200tdi to gas guzzler but it dont seem to want to tick over ? well it will when first started as long as u dont put it in gear but after that well the revs drop right down and it stalls ? it also lacks power if for example u get on the motorway it takes an age to get upto 60 70 mph unless u give it a boot ?
also dont the v8 have a sqaure air intake this one has one very similar to my tdi but smaller looks like it might be off a carburretta modle ????
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Ok let's have some details.
Where did the lump come from, car model etc.
What's the engine number
What EFi system have you fitted?
Is it manual or auto? what was the donor car?
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its a 1993 discovery 3947cc v8i
engine no:36d23417a
not sure on efi type if u let me know were i can find out ill let u know
and its an auto
its got aircon if thats any help
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Is the airflow metre connected and working?
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I can tell you, it's going to be Lucas hot-wire EFi. That's good because it's so much better than the old flapper system.
If you can stand the cost, the Range Rover classic manual has a really good section on the Lucas EFi and how to test all the components with a multimeter, mostly.
It's worth doing just to be sure all the connections have been made properly. For example if the road speed sensor has been ignored this could give you a problem.
The EFi regulates idle speed with a stepper motor in the housing at the back of the plenum. It's supplied air via the rubber hose that loop behind the throttle cable and butterfly. The throttle butterfly itself closes fully at idle, if this has not been set up properly the EFi will struggle to control the engine and this could be what's happening. or the stepper motor could be stuck.
A faulty MAF sensor (hot-wire) might screw up the mixture but TBH mine will start and drive with it missing completely, perhaps this is easier to deal with than a faulty one.
Does it have lambda sensors, again these could be Lying.
The EFi also know when the heated screen or airconn are on and steps up the idle speed to keep the alternator charging.
Tiy need to chck the installation carefully as it's likely on a retro fit that something has been missed or become faulty.
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well from the look of things its had the heads done.
it starts first time every time it will even tick over but when u set off in drive or reverse and so on if u have to brake for lights or a junction then it dies off and it will either stall or drop so far down that it feels like some body shaking the car and strangling the fuel.
ill have a check in morrning make sure every thing is connected,even when air con is on no change in revs ? but i been told it not staying on due to the fact the centerfugle clutch thing on the front stops spinning .
and im still confused as to the air box bit smaller than the one on my tdi and cylinder shaped .but cheers guys like i say ill look im morrning and ill let u know ?
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I have a copy of the pdf test manual for the EFi if anyone wants........ I have used it a couple of times and its foolproof.
Do we have a documant repository for things such as this so everyone can access them??
Damon
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that would be most help full as im so used to my tdi
any chance u can send it over msn aj_livsey@hotmail.com
or sub4x4@hotmail.co .uk but the first one is the one i use most
cheers andy
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Have sent it to both addresses........... but is large file so let me know if you don't get it as hotmail sometimes blocks them.
Let me have a 'proper' email if it does.
Damon
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lol proper email :D
i used to work all over the place so msn was easier lol
any cheers got them ? big files they tiny mate lol im used to 300mb files just a shsme ntl not upto scratch