'21 GT4 - Repeated Engine Control Fault, Car shuddering
#1
Intermediate
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Just want to share this on the forum in case any others have this issue, don't know what it is yet but here are the symptoms... My VIN is not part of the impacted connecting rods or suspension issues (as of yet)
ECF (driving permitted) came on at engine start about a week ago, I call the dealer and schedule an appointment for today (about 4 days later).
ECF turns off by itself yesterday (day before the appointment, of course...)
Still take car in to dealer
No codes saved, dealer sees no issue. Runs PDK Software update (open campaign) and gives car back. Enables "Test" mode on ECU to capture more info in case it happens again
No issues on drive home, make a grocery run, no issues there.
Start car again, ECF back on, this time engine is noticeably angry and bubbly.
ECF messages start flashing 1/2, 2/2, then finally calm down to 1/1 messages
Car now shuddering/shaking once i gets to about 1900 RPM
Limp home
*edit* Call dealer, they dispatch a flatbed to tow away
*edit* Tow truck arrives, I start the car, NO ECF AGAIN!!!
Car gets towed away...
Now I wait.....
ECF (driving permitted) came on at engine start about a week ago, I call the dealer and schedule an appointment for today (about 4 days later).
ECF turns off by itself yesterday (day before the appointment, of course...)
Still take car in to dealer
No codes saved, dealer sees no issue. Runs PDK Software update (open campaign) and gives car back. Enables "Test" mode on ECU to capture more info in case it happens again
No issues on drive home, make a grocery run, no issues there.
Start car again, ECF back on, this time engine is noticeably angry and bubbly.
ECF messages start flashing 1/2, 2/2, then finally calm down to 1/1 messages
Car now shuddering/shaking once i gets to about 1900 RPM
Limp home
*edit* Call dealer, they dispatch a flatbed to tow away
*edit* Tow truck arrives, I start the car, NO ECF AGAIN!!!
Car gets towed away...
Now I wait.....
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Last edited by jd-woodlands; 04-07-2021 at 08:13 PM.
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mr965 (04-14-2021)
#2
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So sorry to hear that...not confidence inspiring to say the least. How close is your VIN or build date to the known impacted cars?
#3
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I think it was an October build date, forgot to check the plate before they towed her away. VIN is MK289092 which was a few hundred or so before the ones listed in the other thread. Will keep this thread updated with any new info i get.
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Jeff Jones (04-07-2021)
#4
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and no codes retained? - did to try and read codes while the fault was indicated?
fuel pump or injection system issues (hopefully)
fuel pump or injection system issues (hopefully)
#5
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Fire up a camera, take some snap shots, record. About all you can do.
Wouldn't be some bad gas would it? Something floating in the tank?
Wouldn't be some bad gas would it? Something floating in the tank?
#6
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Bad gas? Loose gas cap - would this create a different error message?
#7
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Last edited by NoobPorscheNoob; 04-08-2021 at 12:06 AM.
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#9
Intermediate
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First call from the dealer - Cylinder 5 misfire, they are moving the coils to another cylinder and test driving to see if its them or something else.
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#10
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Dealer reports cylinder misfire still occurring in #5 after coils moved. Cylinder pressure and leak down tests are good. Porsche now recommending replacing injector.
#11
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If its a misfire and your scanner missed it, your scanner sucks. Also, sorry about the misfires hope its a quick fix and youre back in the saddle soon.
#12
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looking like 1.5 - 2 weeks for the part to arrive to the states... so without my new car for a bit.
no guarantee it will correct the issue either.
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#13
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Update from my dealer... As they removed the injector they noticed black build up, similar to carbon on the injectors. Techs noticed it was sticky and was individual pieces and not carbon build up.
After further analysis and photos to Porsche, they advised that it was a foreign contaminant introduced during assembly of the high pressure fuel system.
So now they are going to replace all high pressure fuel system components -> fuel pumps, fuel lines, fuel filters, all 6 injectors, all coils, and anything else fuel touched.
And its going to be at the dealer for another month. So at least I have a loaner... any chance PCNA offers me anything if I give them a call? Not super happy at the moment.
After further analysis and photos to Porsche, they advised that it was a foreign contaminant introduced during assembly of the high pressure fuel system.
So now they are going to replace all high pressure fuel system components -> fuel pumps, fuel lines, fuel filters, all 6 injectors, all coils, and anything else fuel touched.
And its going to be at the dealer for another month. So at least I have a loaner... any chance PCNA offers me anything if I give them a call? Not super happy at the moment.
![banghead](https://rennlist.com/forums/graemlins/banghead.gif)
#14
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Update from my dealer... As they removed the injector they noticed black build up, similar to carbon on the injectors. Techs noticed it was sticky and was individual pieces and not carbon build up.
After further analysis and photos to Porsche, they advised that it was a foreign contaminant introduced during assembly of the high pressure fuel system.
So now they are going to replace all high pressure fuel system components -> fuel pumps, fuel lines, fuel filters, all 6 injectors, all coils, and anything else fuel touched.
And its going to be at the dealer for another month. So at least I have a loaner... any chance PCNA offers me anything if I give them a call? Not super happy at the moment.
![banghead](https://rennlist.com/forums/graemlins/banghead.gif)
After further analysis and photos to Porsche, they advised that it was a foreign contaminant introduced during assembly of the high pressure fuel system.
So now they are going to replace all high pressure fuel system components -> fuel pumps, fuel lines, fuel filters, all 6 injectors, all coils, and anything else fuel touched.
And its going to be at the dealer for another month. So at least I have a loaner... any chance PCNA offers me anything if I give them a call? Not super happy at the moment.
![banghead](https://rennlist.com/forums/graemlins/banghead.gif)
#15
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Any chance you would share your VIN, either as a reply to this or private message? An acquaintance experienced a similar issue and Porsche ended up buying his car back. Would like to see if they were similar production numbers.