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Coolant Temps
The differential is normal. The lower hose is supposed to stay a lot cooler than the upper hose because it’s the cool side of the system - coming out of the radiator. As for temps, at 221-223 the t-stat is not quite fully open, so you still have a little cooling capacity left. I would... -
Misfires on one side 3L SCV6 2015
Maybe I missed it in the above discussion, but seems like o2 sensors would be the number one suspect here. Have those been checked/changed out? -
Persistent misfire under load only
Sorry for the delayed response - missed the alerts on this thread. Yes, I think that points pretty strongly to a vacuum leak. Looks like it drops at both levels of increasing RPMS. Could be MAFs, so I’d still take a look at those numbers as well, but I believe vacuum leak would be prime... -
Persistent misfire under load only
high positive = too lean, i.e., car is needing to add 20%+ fuel to try to reach the target air/fuel mixture. Car must be warmed up or it won’t be in closed loop, at which point it is just using scheduled air/fuel. After warm up, take the fuel trims at idle and holding steady at a couple of... -
Persistent misfire under load only
or if your fuel adaptations are not readjusting for some reason. -
Persistent misfire under load only
Have you looked at fuel rail pressure or fuel trims? Under load only makes fuel delivery come to mind. Might check tsbs on that car as well. not sure what components might have changed in the new platform, and whether they might have had new issues pop up. -
Entire bank 2 misfire
most vvts you just pull them off and put 12v to them - see if they move (or click if enclosed). not sure if these have anything else that can go wrong with them. i haven’t had to mess with them yet. -
Entire bank 2 misfire
Fuel pressure shouldn’t affect one bank only. I’d be thinking the vvt or cam solenoid as someone else mentioned, or o2 sensor - except op said fuel trims look okay. Fuel trims checked after warm up I trust - if not, check again warmed up. The VVTs are oil pressure actuated as I understand... -
Troubleshooting coolant vacuum fill failure
The scv6 has a supercharger, no turbocharger. Superchargers are really dead simple. Just a big blower on top of the air intake run by a single belt off the engine, and it gives a very nice boost even at low RPMs. The only thing that complicates repairs is that the sc has an intercooler that... -
Troubleshooting coolant vacuum fill failure
I believe this car is designed to run at 220-230. I looked into the engine temps and t-stat specs before, and the V6 engine seems to run a thermostat that starts to open at around 204-207 and is not fully open until 228, (I think the older V8’s ran a cooler thermostat that starts to open... -
Troubleshooting coolant vacuum fill failure
Really sorry you are having this string of bad luck. Hope things start looking up for you. Not sure you should run the engine for the exhaust gas test with only 8 liters of coolant in the system (and a massive leak someplace). I’d probably do a compression or leak down test on each... -
Troubleshooting coolant vacuum fill failure
None of the seals you mention (intake manifold, PCV, intercooler/supercharger interface) will make any difference to your vacuum fill. Only the coolant lines and passages, which includes intercooler itself radiator, water pump, head gaskets, heater cores, etc. If it’s not your compressor, the... -
Fan and lean codes
Idle position - for sure it’s open some. Not sure what this electronic throttle does when it’s powered off. I assumed you needed ignition on to get it to open, but maybe not. -
Smoke test, P0170 code and PCV
missed the smoke escaping from PCV. no, i don’t believe that’s normal. The way that valve works, it should be sealed along its perimeter by the pressure of the cap. If you’ve got smoke getting out under a pressurized smoke test, either the cap is not down tight or, more likely, the edge of... -
Fan and lean codes
Smoke test should be done engine off with the throttle plate opened (at least partly). Can’t smoke test with the engine running as all the smoke gets sucked down into the engine. To be clear - we’re talking about smoke testing the intake by sending smoke through one side of the intake under... -
Smoke test, P0170 code and PCV
I still think the misfire was probably triggering the fuel trim code. I’m hoping your fix for the misfire also stops this code from popping up. -
Fan and lean codes
Bad MAF can give lean condition on both banks. There are two intakes/MAFs, but the air is combined at the throttle body, so the MAF readings are used together. If one is bad, it affects both banks. Look at the live values for the MAFs and see if they track each other at a few different... -
Smoke test, P0170 code and PCV
I’m not 100% on this, but I think fuel trims are not very valuable readings during acceleration/deceleration, only cruising and idle. I believe the car goes into open loop fuel control, so not sure if you can discern anything from the fuel trim readings. -
Persistent misfire under load only
Combined short and long term fuel trim looks consistently positive at all RPMs tested, so it's running somewhat lean. Both banks are tracking the same, so the cause of the lean condition shouldn't be something bank/cylinder specific. Looks like at idle combined fuel trims are sitting at... -
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Persistent misfire under load only
I just do my best to hold the accelerator steady for long enough to see the fuel trims get steady then keep it there for maybe 4-5 seconds - long enough to get it on the graph. For instance, if you increase to 1500 and see the fuel trims start to move, I’d try to keep it steady at 1500 long... -
Persistent misfire under load only
Are you still getting misfire code/live data only in one cylinder? I was thinking the misfire was causing the fuel trim code, but that time recording of fuel trims you posted in the other thread is showing identical behavior in both banks. Fairly lean most of the time with massive lean... -
Intermittent P0174-00 Code on '13 5.0L V8 w/ 130k Miles
@stone4567 Not likely a MAF if it’s affecting just one bank. Vacuum leaks also tend to affect both banks. If you can do it with your tool, check lambda and fuel trims to make sure the lean is just on one bank. If not, maybe try replacing the upstream o2 sensor on the bank with the code... -
PCV Valve, Diaphragm, Spring Replacement
The main thing that interferes with replacing the PCV on the supercharged models is the supercharger. It doesn’t interfere enough to make it worth removing it just for the PCV. I used Some string to keep the spring compressed while I got it into place, then pulled the string out - see post 13... -
2014 Land Rover LR4 SCV6 Hesitation/Shutter While Accelerating
You seem to have a code reader - can you check fuel trims? Also, you might take a look at your throttle body - see if there’s any gunk that might be causing the butterfly valve to hang up.
