Vehicle & Technical > Defender
Td5 hesitating at junctions........
Jimbo:
Ian,
Nanocom had a few faults logged - the usual 10-1, 10-4,10-5,14-1,14-4 and 14-5 due to the 110 not having aircon or ABS.
It also logged a 2-8, Ambient pressure circuit, and a 4-3, Coolant temp cct - but I'm guessing the 4-3 was due to the engine being stone cold.............the 2-8 was a logged fault, anything to worry about ?
Live data looks normal, MAF reading around 56-57 once the truck had been running a few mins, MAP 101-102, ambient pressure 102.
Switches - Nanocom shows the clutch switch to be OFF when you press the clutch pedal to the floor, and ON when the pedal is released.
It also reckons that the T-box is in LOW, when it's actually in HIGH, and vice-versa - but I seem to recall you saying that LR fiddled the ECU software to make it easier for townies to drive ?
I'm going to check for the dreaded oil in the injector loom and give everything a once-over now.
Jim
Jimbo:
Hmm, no oil in the injector loom - so some good news :roll:
I took the MAP (manifold air pressure) sensor out, it was soaked in oily gunk, so cleaned it up with some carb cleaner and left it to dry in the sun. Took the intercooler hose off the inlet manifold expecting to find loads of oil (cos the MAP sensor was caked in it) - but it was all quite clean.
Checked the MAF sensor, looks clean, no crud blocking the mesh cover, air filter and inlet pipes all ok too.
Re-assembled everything, and checked the figures with Nanocom - all the same as before.
Took the truck out for a warm-up run, then a blat once it was up to temp............and the hesitation problem has gone :-.
It's either some electrical/sensor gremlin that's decided to play hide and seek with me, or cleaning the MAP sensor did the job.......weird !
Landy Andy:
Well done Jimbo, just keep those fingers crossed.
Andy
BS3143:
Jimbo,
You will have fixed it by cleaning the MAP/IAT sensor. The MAP/IAT is a combined sensor, the Inlet Air Temperature part is the black rod section, which causes no problem but the Manifold Absolute Pressure is a small hole to the base of the sensor, right at the base of the black rod, this contains a peizo crystal and this is were the problem starts. On higher mileage engines old deposits block this small opening causing the fault you had. Service does not call for this ever to be removed and cleaned unless diagnostics pull it up. The answer is ever 12 000 miles, remove and clean, also checking the green "o" ring is not split. Clean with rag and cotton bud, harsh cleaners will damage the sensor. Do not push the cotton bud right into the hole, just remove debris from surface.
Hope this helps,
Ian.
age:
Sorry to butt in guys - my CSW Td5 at 145k seems to be startng to do this.... Could you just describe for an imbecile where the MAP sensor is to remove and clean?! Thanks, A
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version