Orion03 Posted 17April, 2014 Report Share Posted 17April, 2014 So I was idling at the lights this morning, idle idle. Then the car started running a bit rough.. just noticed it. Then the Check Engine light came on! lights turned green, I drove off looking at this Check Engine light... then it went off. Hmmmmm. What? what? What should I do? Atm I am thinking maybe the fuel injectors might be a bit gummy and I should throw in a bottle of injector cleaner. Or could it be because I pulled into a petrol station and it was out of 98 octane and I 1/2 tank filled with 95 Octane? But I've had the sudden rough idle before, but no engine check lights. Link to comment Share on other sites More sharing options...
Russ Posted 17April, 2014 Report Share Posted 17April, 2014 my suggestion would be to plug it into a diagnostic computer and find out... CEL is the most non descriptive of lights! it could be any number of things from an O2 failure to something electrical Link to comment Share on other sites More sharing options...
Orion03 Posted 17April, 2014 Author Report Share Posted 17April, 2014 I am thinking it's good I have Porsche Warranty atm Link to comment Share on other sites More sharing options...
Russ Posted 17April, 2014 Report Share Posted 17April, 2014 could be something simple too, but worth getting the diagnostic answer on what it actually it is rather than trying to troubleshoot it Link to comment Share on other sites More sharing options...
Hounddub Posted 17April, 2014 Report Share Posted 17April, 2014 Please keep us updated Orion. According to the IMS diagnostics this can sometimes be and indicator of imminent IMS failure with the cam sensors reading themsleves being out of alignment. Good luck...lucky for warranty. Link to comment Share on other sites More sharing options...
Orion03 Posted 17April, 2014 Author Report Share Posted 17April, 2014 tell me about it, my first thought was OMG the IMS bearing! Link to comment Share on other sites More sharing options...
Orion03 Posted 16May, 2014 Author Report Share Posted 16May, 2014 So I took my car into Porsche Center Melb this morning, and they hooked it up to the computer, misfire on 2nd cylinder was recorded. Spark plugs were changed in Oct 2013..... could be the coil packs...... I got sent on my way with "nothing serious, let us know if it happens again and we'll keep the car for 2 days and diagnose more" Link to comment Share on other sites More sharing options...
Guest Harold Posted 16May, 2014 Report Share Posted 16May, 2014 Do the words 'Trade In' resonate in your ears? Good luck Link to comment Share on other sites More sharing options...
Pauly Posted 18May, 2014 Report Share Posted 18May, 2014 Simple. take one coilpack out, swap it with another cylinder and when the engine light comes on again. get it checked. if the cylinder changed with the same coil pack. That's the problem. Link to comment Share on other sites More sharing options...
Orion03 Posted 19May, 2014 Author Report Share Posted 19May, 2014 Yup... funny enough I have not jacked up my car yet! I've put some injector cleaner into the tank, lets see if it's a sticky injector. And yes I'll think about jacking up the car to look at the tail.. Hey I bought a Porsche so I don't have to get under the car ! lol Link to comment Share on other sites More sharing options...
tazzieman Posted 19May, 2014 Report Share Posted 19May, 2014 Hey I bought a Porsche so I don't have to get under the car ! Or wipe your own bum Porsche anxiety creates a lot of profit. The more you know , the heavier your wallet! Link to comment Share on other sites More sharing options...
SteveT Posted 19May, 2014 Report Share Posted 19May, 2014 I bought a second Porsche so I CAN get under the car! Link to comment Share on other sites More sharing options...
Orion03 Posted 21May, 2014 Author Report Share Posted 21May, 2014 I spent so much time with my Elise in pieces and up on stands that I went for a 997C2 hoping that I wouldn't have to jack this one up. yes i am now realising that this is not reality..... Link to comment Share on other sites More sharing options...
qstoria Posted 23May, 2014 Report Share Posted 23May, 2014 Great advice from Pauly first up so follow it if you can. Simple. take one coilpack out, swap it with another cylinder and when the engine light comes on again. get it checked. if the cylinder changed with the same coil pack. That's the problem. If you did just fill up with any sort of fuel just beforehand then my solid bet is that there was some minor discrepancy with that given that it the CEL was only on for a moment. ECU didn't like things for a second or two then all went back to normal. I've seen a fair few CELs come on just after filling up If the CEL wasn't flashing then its not in the 'catastrophic' category. Dont jump the gun and assume the worst (IMS) when one small thing occurs. Cars can be temperamental things remember, even 2nd hand 911s! Enjoy your car Link to comment Share on other sites More sharing options...
Orion03 Posted 26May, 2014 Author Report Share Posted 26May, 2014 Dont jump the gun and assume the worst (IMS) when one small thing occurs. I've got my bet on fuel quality, and fuel filter and particles in the injectors, which is why I put in a bottle of injector cleaner. We'll see how we go. Link to comment Share on other sites More sharing options...
Russ Posted 26May, 2014 Report Share Posted 26May, 2014 when you're plugging/unplugging your coils make sure you don't electrocute yourself. Ignition systems are a lot more powerful than they used to be Link to comment Share on other sites More sharing options...
Orion03 Posted 26May, 2014 Author Report Share Posted 26May, 2014 surely when the ignition is off it's safe to unplug coils? Link to comment Share on other sites More sharing options...
Russ Posted 26May, 2014 Report Share Posted 26May, 2014 yep, I was more suggesting being careful - like disconnecting the battery etc Link to comment Share on other sites More sharing options...
Orion03 Posted 27May, 2014 Author Report Share Posted 27May, 2014 ah I get you. But... On my Subaru liberty, when I disconnected the battery, it forgot how to idle the car, which caused me a heart attack until I googled it and google said yes the engine management forgets idle condition, go drive the car around for a while for it to reset. Any such hidden goodies in the 997 if I disconnect the battery for a while? Link to comment Share on other sites More sharing options...
Russ Posted 27May, 2014 Report Share Posted 27May, 2014 I'd say so, most current ECU's learn from conditions and reset to base when the battery is disconnected easy way to sort it out on most cars idle for 5 minutes idle for 5 minutes with A/C and headlights on so it has a 'load' if an auto do the above in both drive and park (with the park brake on obviously) then go for a drive and see how it behaves I've found it's much easier to do the above than drive around wondering if the thing is going to stall at the lights 'cause it's maps are all back to base Link to comment Share on other sites More sharing options...
Orion03 Posted 27May, 2014 Author Report Share Posted 27May, 2014 My liberty won't even idle in the driveway after a battery disconnect, I had to rev it up manually to keep it running, silly thing. Link to comment Share on other sites More sharing options...
Steiny Posted 27May, 2014 Report Share Posted 27May, 2014 I'd say so, most current ECU's learn from conditions and reset to base when the battery is disconnected Much like the reset of the adaptive throttle on 997 discussed in an earlier post. Link to comment Share on other sites More sharing options...
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