Young bobtail Rhys Posted March 22, 2009 Share Posted March 22, 2009 Got myself a 4.2 to replace me 3.5efi but I am running tubular manifolds and no cats, whereas the 4.2 is a 1994 with cats and lambada sensors. How do I go about removing the sensors and wiring etc. or can't I? Quote Link to comment Share on other sites More sharing options...
SIMEXSLAVE Posted March 22, 2009 Share Posted March 22, 2009 Got myself a 4.2 to replace me 3.5efi but I am running tubular manifolds and no cats, whereas the 4.2 is a 1994 with cats and lambada sensors. How do I go about removing the sensors and wiring etc. or can't I? Hi Rhys I removed mine and had to change to tune resistor but I cant remember what colour I used, I can check tommorrow but no doubt someone far wiser than me will post the details before I get back to you. Jon Quote Link to comment Share on other sites More sharing options...
Young bobtail Rhys Posted March 22, 2009 Author Share Posted March 22, 2009 Hi RhysI removed mine and had to change to tune resistor but I cant remember what colour I used, I can check tommorrow but no doubt someone far wiser than me will post the details before I get back to you. Jon Cheers Jon, doesn't sound as bad as I thought then Quote Link to comment Share on other sites More sharing options...
task Posted March 22, 2009 Share Posted March 22, 2009 Got myself a 4.2 to replace me 3.5efi but I am running tubular manifolds and no cats, whereas the 4.2 is a 1994 with cats and lambada sensors. How do I go about removing the sensors and wiring etc. or can't I? The 4.2 will be "Hotwire" EFI whereas the 3.5 will be "Flapper". Do you have the whole wiring loom with the 4.2, including ECU and air flow meter? You can either add the lambda sensors to the tubular manifolds (I have done this in the past) or as mentioned above remove them and change the tune resistor to a non-lambda variety. Quote Link to comment Share on other sites More sharing options...
landroversforever Posted March 22, 2009 Share Posted March 22, 2009 Rhys, are you going to 'Squirt the 4.2? Quote Link to comment Share on other sites More sharing options...
Young bobtail Rhys Posted March 22, 2009 Author Share Posted March 22, 2009 I have everything I have bought an LSE and have driven it etc. all perfect as the engine has only done 30,000 miles Would like in the future to m/s it but a rear winch is more important atm so that will be next Quote Link to comment Share on other sites More sharing options...
jwriyadh Posted March 23, 2009 Share Posted March 23, 2009 Follow the EFi loom down from the ECU plug for 4-8 inches, you should find a blue two pin plug and socket taped into the loom. This is the tune resistor and will probably be white, a value of 3900 ohms, it needs replacing with a green tune resistor which has a value of 470 ohms. The green tune resistor instructs the ECU to ignore the lambda signals and run in the open loop mode. jw Quote Link to comment Share on other sites More sharing options...
Young bobtail Rhys Posted March 23, 2009 Author Share Posted March 23, 2009 Cheers buddy^^^ Quote Link to comment Share on other sites More sharing options...
lansalot Posted March 23, 2009 Share Posted March 23, 2009 I've never had a lambada sensor. I just keep an eye out for Gloria Estefan manually... Quote Link to comment Share on other sites More sharing options...
will_warne Posted March 23, 2009 Share Posted March 23, 2009 Use the gearbox out of the LSE too - they are uprated and sit somewhere between the HP22 and the HP24 used in the 4.6 P38. Quote Link to comment Share on other sites More sharing options...
Young bobtail Rhys Posted March 23, 2009 Author Share Posted March 23, 2009 Thank you Mr Warne! However, can I run my manual difflock on the back of that or do I need to run the viscous that is already on it? Quote Link to comment Share on other sites More sharing options...
Hybrid_From_Hell Posted March 23, 2009 Share Posted March 23, 2009 Non Cat tune resistor I think is PRC 8172 this changes the map in the ecu Nige Quote Link to comment Share on other sites More sharing options...
Steve 90 Posted March 23, 2009 Share Posted March 23, 2009 Thank you Mr Warne! However, can I run my manual difflock on the back of that or do I need to run the viscous that is already on it? Yes, coz thats what I have in mine. Its the HP22 "740" box out of the 4.2 LSE. It is the strongest of the Hydraulic box's with many of the uprated parts used in the later and uprated box's fitted as std. It bolts straight to an LT230. Quote Link to comment Share on other sites More sharing options...
will_warne Posted March 24, 2009 Share Posted March 24, 2009 ^^^^ Steve beat me to it Quote Link to comment Share on other sites More sharing options...
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