"OPPOsaurus WRX" (opposaurus)
04/20/2020 at 11:20 • Filed to: None
0
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"OPPOsaurus WRX" (opposaurus)
04/20/2020 at 11:20 • Filed to: None | 0
| 14 |
a quick recap:
replaced rusted cats in the process noticed leaking oil pan (may be irrelevant but maybe not)
wife reports shaking and weirdness fro n t the engine (this is kinda where we being)
intake boot is discovered to be torn (between airbox to intake manifold) codes are random misfire and a historic code of cam position sensor.
intake boot is replaced, start car, runs worse than before . theories are that the MAS got dirty or spark plugs are old
MAS cleaned, throttle body cleaned, spark plugs are replaced is a painful process that includes removing the intake manifold.
car runs more similar to when when my wife reported the sh aking . Still getting these codes:
current theories :
- cam position sensor is bad but not bad enough to be a current code
- the oil pan is falling apa rt from the inside out and is contaminating the oil, which only has a couple thousand miles on it.
-the oil solenoid is bad
- the intake control valve is bad
- the injectors are bad
- the coil pack is bad
- some of the above, all of the above, or none of the above
Current plan: change the oil pan, new oil, new filter
what the F should I do?
PyroHoltz f@h Oppo 261120
> OPPOsaurus WRX
04/20/2020 at 11:46 |
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I have no idea what vehicle/year this thing is, forgive me if these have been answered or are irrelevant.
Are you getting spark at all cylinders?
You sure the plug wires are in the correct order? (if it’s not coil on plug)
Did anyone mess around with the distributor? (if it has a distributor? )
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OPPOsaurus WRX
> PyroHoltz f@h Oppo 261120
04/20/2020 at 11:50 |
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2012 Nissan Quest
i dunno if i’m getting spark
the wires should be in the corre ct order as we did 1 plug at a time
we havnt messed with anything else
WasGTIthenGTOthenNOVAnowbacktoGTI
> OPPOsaurus WRX
04/20/2020 at 11:52 |
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The MAF may have been compensating for the torn intake? Might want to disconnect the battery for a while to reset the brain?
I’m not a mechanic, so huge grain of bath salt......
Akio Ohtori - RIP Oppo
> OPPOsaurus WRX
04/20/2020 at 11:58 |
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I agree with the resetting the brain first. Make sure you either know your radio code or don’t need one first, just in case! Always a bugger when that one shows up!
After that I’d replace the camshaft position sensor. Those things are a bugger.
Snuze: Needs another Swede
> OPPOsaurus WRX
04/20/2020 at 12:10 |
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I’m going to go third on resetting the ECU since you’ve replaced the intake boot.
Over the weekend I put a new intake manifold in the Cruze and during the process I pulled and cleaned the MAF. Everything went back together fine but when I went for a test drive I had NO POWER ! Long story short I threw my bluetooth OBD reader on it and pulled up about 10 warning codes (the ones that are stored but don’t trigger a CEL) .
I reset the ECU and everything has been running perfectly since then.
dtg11 - is probably on an adventure with Clifford
> OPPOsaurus WRX
04/20/2020 at 12:12 |
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Try the cam position sensor. That’s a super common issue on all VQ engines
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OPPOsaurus WRX
> Snuze: Needs another Swede
04/20/2020 at 12:24 |
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o yea, thats another fu n aspect of this that I forgot. during our power outage, my wife and kids charged their phones/tablets in the car and drained the battery. I took the powe r cables off and charged the battery. we also cleared the coeds while out on the final test drive and they came back.
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OPPOsaurus WRX
> WasGTIthenGTOthenNOVAnowbacktoGTI
04/20/2020 at 12:25 |
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o yea, thats another fun aspect of this that I forgot. during our power outage, my wife and kids charged their phones/tablets in the car and drained the battery. I took the power cables off and charged the battery. we also cleared the coeds while out on the final test drive and they came back.
GoodIdeaAtTheTime
> OPPOsaurus WRX
04/20/2020 at 12:30 |
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I don’t want to scare you... but I’ve seen some catastrophic issues cause this. Start small. Oil level correct? New cam sensor with OEM only part, I can’t stress this one enough. Next is going to require factory scan tool... What cylinders are misfiring. Will need to test operation of IVT’s and check actual cam gear angles. It could possible need solenoids, or timing chains and gears, or rear timing cover (internal oil leak, theses are fun to diagnose) or IVT covers. Or harness repairs. And those are just a few that I have done to fix the P0021. The P0300 might be a consequence of the other code, or could be failing injectors/harness. Don’t throw parts at it, please!
Hate to say it, but it will probably need some hefty diagnosis. There arne’t any bulletins f or the issue, but a whole lot of engineering/ tech cases... it might get expensive.
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Snuze: Needs another Swede
> OPPOsaurus WRX
04/20/2020 at 12:37 |
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Okay, so ECU should have been reset, problem persists, so it’s not the MAF thing.
I know nothing about these engines so I have no idea how hard it is to get to the cam sensor, or if they are even the same part for the
left and right (front and rear?) banks
,
but could you swap them around
?
If the fault moves to “Bank 1" then you know what it is, and if not at least you know the sensors are okay.
W hy do you think the oil pan leak is causing, or related to this issue? I have an idea but I’m curious to hear your reasoning.
Jayvincent
> OPPOsaurus WRX
04/20/2020 at 12:46 |
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if it idles fine, but coughs and shakes on moderate gas pedal, it’s likely a bad coil pack based on my Honda and Toyota experience. In my limited (90's GM) experience a bad cam or crank position sensor will result in n0-spark (ECU sees no cam/crank motion so no spark signal) resulting in engine cutoff. Good luck with diagnosing and wrenching
Thisismydisplayname
> OPPOsaurus WRX
04/20/2020 at 12:47 |
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You said the oil pan was a mess, probably best to replace that, then likely need to replace the solenoid(s). The GM eco techs have similar parts and they are notoriously failing if the oil isn’t maintained. So if you have debris in there, the solenoid could be clogged up and causing the timing issues. And that could cause your misfires too. That’s where I’d start. At least pull it and try to clean it out, but likely it needs replacement.
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OPPOsaurus WRX
> Jayvincent
04/20/2020 at 13:06 |
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its actually the opposite . It idles ok, is rough under light gas, and seems to even out and run smooth under moderate gas.
Fuckkinja
> OPPOsaurus WRX
04/20/2020 at 17:34 |
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I was just chasing a lost cause. Random miss fire. We tried a crank relearn proceedure and it solved all of the issues. 2 years of a parts cannon solved for free. Gm 6.0.