thirteeneast
New member
potentiometers £450+ how can they get away with charging that for a large variable resistor?.
996 starting problems! Help!!
- Thread starter liam996
- Start date
Not trying to justify Porsche's pricing structure, but it is a bit more involved than that. It is a two-channel encoder. It uses two channels to provide a degree of failsafe. Still bl**dy expensive though.
thirteeneast
New member
Id sooner fly by wire any day.
Old skool for me.
Anyone know if the 964 were still cable? Im guessing the 993's are not?.
Old skool for me.
Anyone know if the 964 were still cable? Im guessing the 993's are not?.
964, 993, and early 996's were all cable throttle.
thirteeneast
New member
Thanks Richard for the info
Im surprised at early 996.
Up to what year? I maybe one of the lucky ones ?.
@Liam any word yet?.
Im surprised at early 996.
Up to what year? I maybe one of the lucky ones ?.
@Liam any word yet?.
C2's up to MY2000 had cable throttle. Electronic throttle was necessary for PSM, so was introduced at the same time. All C4's have PSM, and are electronic throttle.
thirteeneast
New member
Guess that means most of us are slaves to binary geeks then in this modern society. DARN!.
liam996
New member
Right, wiring all ok. Problem is likely to be ECU! (or take a loan out as it's known!)
Apparently they cost a few bob, and Porsche Germany and Uk have confirmd that it can't be repaired so a new one has to be found, only one in the country down in Reading! So they are going to use a donor and see if it is that, if so then they will have to get hold of the new one. [
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Apparently they cost a few bob, and Porsche Germany and Uk have confirmd that it can't be repaired so a new one has to be found, only one in the country down in Reading! So they are going to use a donor and see if it is that, if so then they will have to get hold of the new one. [
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liam996
New member
Update: It is not the DME, the donor vehicle was used and made no difference so that is a relief 'at the moment' financially. They now suspect there is a problem with the immobiliser, they have managed to get the car running by bypassing it and working it manually from the throttle but is running VERY rich and alot of fuel is coming through the exhaust! I wondered if this was because it has been cranked so many times without it actually starting and the fuel has been building up?
I don't see how it could be the immobiliser if it cranks, fires, and runs, albeit with manual throttle operation. If the throttle pedal sensor and throttle body have been ruled out it is sounding like it might be a wiring problem to me.
I suspect you are right about unburned fuel in the exhaust.
I suspect you are right about unburned fuel in the exhaust.
thirteeneast
New member
liam996
New member
Not all what it seems apparently! The wiring is now faulty, 4 wires going to the throttle body should show 5 volts? One is showing 9 1/2 volts, so they assume is faulty and are now stripping the wire ans tracing it back to reapir. This in turn has now damaged 'apparently' the ECU (DME)!! And this now needs to be repaired or replaced! Anyone know somewhere i can have the DME checked by and independant so i know they are being upfront with me. I am confused as they have said so many things, thursday it "Definately wasn't" the DME as the donor vehicles DME didnt work in my car either. Now the donor vehicle is failing to start when the put the DME back into it! And it is my car that has caused that DME to fail also. All i know it will be 6 weeks on friday since i had my car ans it's really F@@@@@@ me off.
chriscoates81
New member
Have you thought of taking it somewhere else? For an independant they don't seem to know what the problem is and they're just clutching at straws.
liam996
New member
It's now been to three independents, local guy who works on Porsche, Auto 2000 Kempston & Templetons in Rushden the latter two are well known in the area for being able to deal with Porsche. I am now leaving it with them one last day and the it will be taken to Porsche at Towcester, expensive but i need the car running now to be able to sell it!
I thought you had already taken it to the OPC. From what you said on here and in emails and on the phone, I thought you had decided to do that. Judging by the changing diagnosis on a daily basis, I still think you should do that.
If it is a wiring fault, as I suspect it might be, it is likely to be somewhere on the engine loom, between the throttle body and the main connectors on the right hand side of the engine compartment. From there they go to the DME internally, which are much easier to see, and much less likely to be damaged.
If it is a wiring fault, as I suspect it might be, it is likely to be somewhere on the engine loom, between the throttle body and the main connectors on the right hand side of the engine compartment. From there they go to the DME internally, which are much easier to see, and much less likely to be damaged.
liam996
New member
OPC towcester couldnt take it for a couple of weeks, then Templetons was recomended, Auto 200 coundnt fix it and i managed to get the car picked up from them and taken to Rushden where its been for the last ten days! They assured me they had all the systems in place to fix it, unfortunately it has taken longer than first thought. Porsche are now able to fit the vehicle in this week so if not fixed by 2moro then it should be with them by Wednesday.
Once fixed i have a feeling it is time to move on and cut my losses, have a feeling this is jinxed []
Once fixed i have a feeling it is time to move on and cut my losses, have a feeling this is jinxed [
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liam996
New member
Right i need some advice please as i am being told one thing by Porsche and an ECU specialist and another by the garage.
My ECU (DME) was taken out of my car and replaced with a donor ECU, this failed to solve the problem, then the donor vehicle failed to start when they put the ECU back in. They then purchased a second hand ECU for the Donor vehicle and this doesn't work! They are saying that my car has passed the fault to this donor vehicle! They told me this morning that they have the 'codes' for the ECU and it hasn't solved the problem and therefore proves my ECU is faulty and needs replacing although i have been told by Porsche and the ECU specialist that they would need to get them from Porsche themselves, as far as i can make out this hasn't been done. Porsche and the specialist also said that it is very very rare for the ECU to fail completely and need replacing.
ECUS have said that from what i described it wasn't an ECU problem as have porsche but they both say now it could be as it will be confused and needs totally re programming. Although the original fault still needs to be found. The garaged have said that the fault in my car has 'spiked' my ECU and that of the donor vehicle!
Is all this possible and who do i believe? Porsche have now confirmed that they can fit the vehicle in on Friday if need be and the garage that the car is at have said they will carry on working on it to try and fix the problem, he doesn't really want it going to Porsche as they haven't fixed the problem then how can they charge me, thats the impression i get.
I know it will have to go to Porsche i just don't want to be lumbered with a bill from this garage IF they have done something wrong.
My ECU (DME) was taken out of my car and replaced with a donor ECU, this failed to solve the problem, then the donor vehicle failed to start when they put the ECU back in. They then purchased a second hand ECU for the Donor vehicle and this doesn't work! They are saying that my car has passed the fault to this donor vehicle! They told me this morning that they have the 'codes' for the ECU and it hasn't solved the problem and therefore proves my ECU is faulty and needs replacing although i have been told by Porsche and the ECU specialist that they would need to get them from Porsche themselves, as far as i can make out this hasn't been done. Porsche and the specialist also said that it is very very rare for the ECU to fail completely and need replacing.
ECUS have said that from what i described it wasn't an ECU problem as have porsche but they both say now it could be as it will be confused and needs totally re programming. Although the original fault still needs to be found. The garaged have said that the fault in my car has 'spiked' my ECU and that of the donor vehicle!
Is all this possible and who do i believe? Porsche have now confirmed that they can fit the vehicle in on Friday if need be and the garage that the car is at have said they will carry on working on it to try and fix the problem, he doesn't really want it going to Porsche as they haven't fixed the problem then how can they charge me, thats the impression i get.
I know it will have to go to Porsche i just don't want to be lumbered with a bill from this garage IF they have done something wrong.
I understand that a fault in the wiring of your car could have damaged both your DME, and the DME of the donor vehicle when it was fitted to your car. However, I doubt that it could have damaged the wiring of the donor car when the DME was refitted. I would have thought it would blow a fuse rather than damage the wiring. So, I'm at a loss to see how the second hand DME fitted to the donor car could have failed.
IMO, what needs doing is to check each of the 60+ wires connecting the DME to the engine sensors, actuators, and the throttle pedal, for a break or short to ground. It is likely to be a painstaking process, but the only way to find out where the problem lies before fitting a known good (or new) DME. Maybe re-programming your original DME might work in this case.
IMO, what needs doing is to check each of the 60+ wires connecting the DME to the engine sensors, actuators, and the throttle pedal, for a break or short to ground. It is likely to be a painstaking process, but the only way to find out where the problem lies before fitting a known good (or new) DME. Maybe re-programming your original DME might work in this case.
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