Probably the injector loom, especially if it's original.
D2a Td5 has just developed a "miss" (rough idle, rough running) in last 100 k's out bush.
Plugged in Nanocom and get message "injector 4 open circuit detected".
Still on original injector harness and injectors, no signs of oil running down harness to ECU.
This problem came on suddenly in course of an afternoon.
Where should I start looking for source of rough idle?
Probably the injector loom, especially if it's original.
Hi had this same scenario about 3 years ago..Use the Nanocom and fire the injectors one at a time in a quiet environment...listen for the click as it fires...if you find one that doesn’t fire swap over the connector from one that does fire and see if works, this will tell you if it’s the injector coil or the harness, for me I had an open circuit solenoid on top of the injector, replacing the coil fixed mine, got the coil from a used injector that didn’t look to good at the squirt end. I haven’t had any more problems since, or find a decent second hand complete injector. I only had 145k on the clock when this happened to my Disco!!
Brad
Range Rovers Have Charactors inside them
LROCWA Ex member 23 years
1971 Series 2A
2004 Discovery2a V8 Auto
2003 Discovery2a TD5 Manual
1982 4door man (sadly now gone)
1989 Vogue auto
2011 TDV8 Vogue
What would life be without a Rangie?
In the scan I did before the "open ciucuit detected" message, I had a message saying "number 4 injector staying on longer" (or something to that effect), so it may well be that something "electrical" on number 4 injector has died and it now registers as an "open circuit". No TD5's hearabouts so will likely be chasing up some injector spares to sort the problem.
Changed out the injector harness (which looked perfect and nil oil leaks or such), and the problem seems to have gone.
Back to running smoothly.
Glad it wasn't injector issue at least.
Thanks for responses.
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