2007 Audi Q7 3.6 Intake Crankshaft Position Sensor Location Free Updated
2007 Audi Q7 3.6 Intake Crankshaft Position Sensor Location Free Updated
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02-15-201507:eighteen PM #i
Active Member One Ring
Urgent - 2007 Q7 3.6 cranks just does not start, no VAG-COM codes
Hi anybody. I demand aid with this every bit fast as humanly possible, I am hoping someone sees this and can give me some pointers.
My 2007 Q7 3.6 is cranking but not starting. This is the second time this happens (meet below) but this time the machine seems like information technology won't start on its own like before. Here are more than details:
- VAG-COM does not brandish any codes when it merely cranks and fails
- One out of 3-4 tries information technology does start but idles very rough and I can rev it upwards to 4000 RPMs but it immediately dies - in this example I do go a agglomeration of VAG-COM codes (misfires and intermittent signals for diverse sensors, none in the Engine module). The battery discharges quickly so I have to keep information technology hooked up to my friend's vehicle, I am assuming that's why I become the intermittent signals.
- I did change 1 of the fuel pump relays with no improvement
- I think I was able to read the fuel pressure (Engine/Measuring Blocks/Group 103) and it is pretty steady at 7 bar. This seems to be normal, right? Does information technology also dominion out the fuel filter?
- I cannot locate the engine speed sensor (crankshaft position sensor) G28. The fact that there are no codes thrown indicates this could be the culprit, correct? I purchased an AllData subscription and they practise non have any information well-nigh the G28 sensor
- Could this exist because of clogged injectors? I tend to call back not, equally this happened all of a sudden with no prior signs and it doesn't seem isolated to but a few of the injectors/cylinders
- This is simply the second time this happens, both during extremely cold days. The commencement time the car but started and afterward a menses of rough idling information technology began running smoothly after information technology spit a lot of black water out of the exhaust. I and so idea the moisture buildup in the engine/frazzle froze and caused this. I now tend to remember that was non the case.I know this is a lot to procedure but any assist would be appreciated. I establish near no information about fuel pump and crankshaft position sensor issues related to the Q7.
Thanks!
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02-fifteen-201507:51 PM #2
Established Member Two Rings
If the engine starts at all I would definitely dominion out the crankshaft position sensor. If the injectors were chock-full you would near likely throw a misfire code...also seeing how this is happening is farthermost cold weather condition more than likely your fuel may have moisture in it. I would buy some heet or seafoam to help stabilize the fuel and see if that helps.
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02-15-201509:28 PM #3
Established Member Two Rings
Sounds like your non getting spark. I would bank check the coil packs. One might be dead causing the no commencement and rough idle issues and misfire codes.
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02-sixteen-201505:04 AM #iv
Agile Member One Band
Thanks for the suggestions, I will try them. Hither are boosted details:
- I did throw some Heet into the tank. Should I double up (any gamble of harm with less than 1/ii the tank full?) or employ Seafoam at the throttle trunk? Maybe both?
- the car has new curlicue packs installed by the dealer under a recall almost 3-4 months ago as well as make new spark plugs and air filter. I installed new spark plugs and the new air filter 3 days ago when this start happened
- I have noticed a lot of white smoke lately and information technology doesn't seem to be from coolant (coolant level unchanged and there is no milky stuff in the oil)Thanks over again!
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02-sixteen-201507:28 PM #v
Established Member 2 Rings
Is the 3.6 a direct inject motor? If and then any fuel additive is not going to do much because the fuel is injected directly into the engine different port fuel injection. Not sure if the iii.vi had carbon issues merely if information technology is a DI engine that could be the outcome. Just most all DI engines suffer from carbon buildup.
What about your catalytic converter, accept you checked to brand sure they're not clogged? A clogged cat could also throw those codes.
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02-sixteen-201508:22 PM #vi
Agile Member One Ring
Starter fluid did not aid indeed. Car is at an independent mechanic at present.
Question: if information technology is a carbon buildup problem, why would information technology happen all of a sudden? Shouldn't the automobile feel a gradual subtract in perfomance?
Thanks again!
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02-17-201508:52 AM #7
Established Member Two Rings
Yea, that's right but if y'all bulldoze the car everyday it can be really hard to tell the deviation until there's so much carbon in the intake and valves that the machine is no longer runs in the rubber parameters of the ecu and it throws codes and runs bad.
Please allow united states know the diagnosis is once you observe out. I'm really intrested to know what the trouble is. I'thou certain information technology's something simple.
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02-17-201509:43 AM #8
Active Member I Band
I volition keep everyone posted.
If it is carbon deposits what'southward the solution? Clean the injectors only? Valves?
Thanks
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02-17-201508:32 PM #9
Established Member 2 Rings
It's pretty labor intensive. They take the intake manifold off and clean the inside of that thoroughly and then clean all the intake and exhaust valves. All hand scrubbed and vacuumed out. Some engines can take a total day disassembling, cleaning and reassembling. Y'all don't have to worry about carbon buildup if your engine is not direct injection though.
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02-17-201508:48 PM #10
Active Member One Ring
How do I know if my engine is DI?
I am now told the exhaust arrangement was clogged after the cats. Is at that place a resonator betwixt the cats and the muffler?
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02-17-201509:06 PM #11
Established Member Ii Rings
Here yous get. http://www.caranddriver.com/reviews/...t-specs-page-ii it does indeed await like it's DI. Then the carbon cleaning It might be something to consider if you start having issues and throwing codes.
Thats good news! A clogged resonator is a easy ready. Ask the mechanic what caused the clog, sometimes the CAT element can breakdown, break apart and become chock-full in other areas in the frazzle system. There is a resonator between the cat and muffler maybe even 2. Looks similar a easy fix either way.
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02-xx-201505:24 AM #12
Active Member One Ring
It turns out this whole ordeal was acquired by a iii-iv' portion of the exhaust (including the resonator) that was frozen solid. I did notice a lot of white smoke lately and the icing on the cake must have been backing into my spot that was surrounded past snow/ice. The rut of the exhaust probably melted more than snow that got in at that place and clogged everything upward. I've seen pictures of the exhaust when they cut it, it's pretty incredible how that happened and how information technology caused this without throwing whatever codes...
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02-20-201502:07 PM #13
Established Member Ii Rings
Originally Posted past georgep1980 
It turns out this whole ordeal was acquired past a 3-four' portion of the frazzle (including the resonator) that was frozen solid. I did notice a lot of white smoke lately and the icing on the cake must have been backing into my spot that was surrounded past snow/water ice. The heat of the frazzle probably melted more snow that got in at that place and chock-full everything upwardly. I've seen pictures of the frazzle when they cut it, information technology's pretty incredible how that happened and how it caused this without throwing any codes...
LOL You got to exist kidding, well thats a beginning for me for certain. I glad information technology worked out for y'all. Hope they didnt charge you lot to much.
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2007 Audi Q7 3.6 Intake Crankshaft Position Sensor Location Free Updated
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