Grant. Posted February 29, 2012 Share Posted February 29, 2012 Hi all, Just in the process of fitting a v8 in my 90. fitted tubular exhaust manifolds to it, however trying to find any information I can regarding if I need to fit the lamda sensors in the system still or if i can leave them out? Any solutions if i have to do anything? Tried goooogling, but theres a million answers, and nothing set in stone! Many thanks in advance Grant Quote Link to comment Share on other sites More sharing options...
Hybrid_From_Hell Posted March 1, 2012 Share Posted March 1, 2012 Change the tune resistor in the harness to a non cat one Quote Link to comment Share on other sites More sharing options...
Roverbo Posted March 1, 2012 Share Posted March 1, 2012 Hi, Copy/paste from britishv8.org (link) Tune Resistor A Tune Resistor was originally specified in the wire harness so that one ECU part number could serve multiple vehicle markets. (Multiple computer programs could be stored within the ECU, and the ECU could "decide" which one to use based on what resistance it sensed.) One leg of the Tune Resister was wired to terminal 5 of the ECU, and the other leg was spliced to ground. At some point during 14CUX production, Rover apparently decided to eliminate the Tune Resistor. (According to Rover service literature, this started with VIN number LA451517.) It isn't clear from the literature whether any US-market 14CUX systems would be effected by having an incorrect or damaged tune resister. The following information on Tune Resistors is based on Rover service literature. Visual inspection of wire color codes will allow you to quickly differentiate between resistors. White 3900 Ohms USA and European vehicles with catalytic converters Green 470 Ohms UK and European vehicles without catalytic onverters Yellow 910 Ohms Saudi vehicles (without catalytic converters.) Red 180 Ohms Australia and "the rest of the world." Note: all four types of Rover Tune Resistors were rated for 0.5 Watts. Quote Link to comment Share on other sites More sharing options...
Ally V8 Posted March 1, 2012 Share Posted March 1, 2012 That website is wrong,the tune resistor was still used right up to the end.PRC8172 is the part # for a non cat 3.9 listed for the MA (1995) model year. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted March 1, 2012 Share Posted March 1, 2012 That may be the case for LR products, but Hotwire and 14CUX was used for a long time after that, on TVRs, which IIRC disposed of the tune resistor. Quote Link to comment Share on other sites More sharing options...
Ally V8 Posted March 1, 2012 Share Posted March 1, 2012 Dunno about TVR's but Morgans had them later on and Disco 3.9's had them up to the end when the DII 4.0 took over.My experience of the TVR's was that they usually broke down before getting warm enough to go closed loop. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.