car is old range rover fitted 1uz-fe, manual box, runs stock toyota ecu, engine is 1995.
please see other posts on idle air control valve...but basically its this..
if in traffic,or around town idle is fine(ish)sits at 650 rpm (would like higher)but when on any run when slowing down to a halt the idle will drop right down and proberly stall,if engine ign turnedoff and restarted idle normally comes back up..
thinking its the iavc playing up i replaced with 91 iacv ,which eventually i got to work, however yesterday that stuck wide open.
so i put back in the 95 iacv (but after stripping and cleaning)
straight away back to normal,good around town,bad after run...(but now sure(ish) the iacv is ok)
so i am thinking that just prehaps something else is causing this to happen..
i can only think of 2 main culprits,though i may well be totally wrong..
1 the TB, i have cleaned it, but prehaps not enough..(anyway could someone tell me why this would effect idle after a run??(read on here it can.))
2 the ecu...i dont think its faulty,but as this is a swap it does NOT have the speedo transducer connected to engine,does the ecu need this to control idle?(it does on the early (mid 80s to 90's) range rover efi setup.)on the range rover set up it raises the idle when it works out you are slowing down off throttle,then drops it back to normal once stopped,without it car stalls..soo..does the toyota ecu need to know speed to work correctly??
engine is from 1995 uk spec ls400
thanks
please see other posts on idle air control valve...but basically its this..
if in traffic,or around town idle is fine(ish)sits at 650 rpm (would like higher)but when on any run when slowing down to a halt the idle will drop right down and proberly stall,if engine ign turnedoff and restarted idle normally comes back up..
thinking its the iavc playing up i replaced with 91 iacv ,which eventually i got to work, however yesterday that stuck wide open.
![Mad :mad: :mad:](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f621.png)
straight away back to normal,good around town,bad after run...(but now sure(ish) the iacv is ok)
so i am thinking that just prehaps something else is causing this to happen..
i can only think of 2 main culprits,though i may well be totally wrong..
1 the TB, i have cleaned it, but prehaps not enough..(anyway could someone tell me why this would effect idle after a run??(read on here it can.))
2 the ecu...i dont think its faulty,but as this is a swap it does NOT have the speedo transducer connected to engine,does the ecu need this to control idle?(it does on the early (mid 80s to 90's) range rover efi setup.)on the range rover set up it raises the idle when it works out you are slowing down off throttle,then drops it back to normal once stopped,without it car stalls..soo..does the toyota ecu need to know speed to work correctly??
engine is from 1995 uk spec ls400
thanks