AndrewG
06-30-2010, 12:42 PM
I'm having a major issue with my RR starting. It turns over, revs high, low, high, low, cut out, but NO CODES ! If I disconnect the MAF it starts and runs rough, obviously in 'limp' (Open Loop) mode, but it throws a Code 12 which I would expect. If I disconnect any of the other sensors, IAF, Collent Temp, Fuel Rail Temp, Throttle sensor, I get no codes !
The ECU is obviously working, I'm getting 02, 12, 45 (after driving for a bit with no MAF) and 03 if I disconnect the battery (after getting tired of resetting all the codes http://landroversonly.com/forums/images/smilies/smile.gif ) but why is in Open Loop mode with only the MAF off.
UPDATE : OK. I spent an enlightening two hours last night with my favorite RR, a Haynes Manual, the RR Workshop Manual and a great article on diagnosing the 14CUX http://landroversonly.com/forums/images/smilies/smile.gif
Long and the short of it is, I went through every check on the ECU and the associated sensors and lo and behold, they all check out fine ! Everything is within spec (and seeing the voltages change with the TPS and MAF is pretty cool http://landroversonly.com/forums/images/smilies/smile.gif )
Now I'm left with the plugs, dizzy or ignition amplifier as the only culprits left, I think.
I'm still confused as to how the RR will start and run with the MAF off if it is the timing, any ideas ?
The ECU is obviously working, I'm getting 02, 12, 45 (after driving for a bit with no MAF) and 03 if I disconnect the battery (after getting tired of resetting all the codes http://landroversonly.com/forums/images/smilies/smile.gif ) but why is in Open Loop mode with only the MAF off.
UPDATE : OK. I spent an enlightening two hours last night with my favorite RR, a Haynes Manual, the RR Workshop Manual and a great article on diagnosing the 14CUX http://landroversonly.com/forums/images/smilies/smile.gif
Long and the short of it is, I went through every check on the ECU and the associated sensors and lo and behold, they all check out fine ! Everything is within spec (and seeing the voltages change with the TPS and MAF is pretty cool http://landroversonly.com/forums/images/smilies/smile.gif )
Now I'm left with the plugs, dizzy or ignition amplifier as the only culprits left, I think.
I'm still confused as to how the RR will start and run with the MAF off if it is the timing, any ideas ?