Had my car remapped on friday and there was no codes before getting it mapped, when they were taking the car off the rolling road it wouldn't start, so scanned it and told me it was just an immobilizer code and started once it was cleared. But i've been having problems starting the car when it's warmed up, starts fine when cold just not when up to temp scanned the car yesterday and got the following codes
17947 (P1539) clutch pedal switch
16706 (P0322) engine rpm sensor intermittent
01314 engine control module (could this be due to the car being remapped?)
Also the maf is unplugged because they said it was that bad it wasn't worth plugging back in
Any help appreciated
Hi!
There where codes under laying and fuel trims of the scale before we worked on the car, which after a bit of time logging we found would not hinder the mapping we was going to carry out as the generic tables would work fine. The crank sensor fault would on come back after a power run and the rpm went over 6500rpm.
When the car was stock and we cleared the MULT fuel trims from -25% then car took a few turns on the key and around 8 seconds to start when trying to get the car on the dyno, after the first stock power runs it was highlighted that the MAF reading where a mile out and eat way at the stock power, so the tuning session was carried out with MAF off and generic mod. The reason the car would not start was beause the plugs would have got sooted up with the maf over reading and dumping the fuel during the last power run we ran the car with the MAF on to see how far the fuel way out and how it would effect the power, we read the codes from the ecu and only stored code was IMMO which I shouted to Jim , which was down to the ecu booting up for the map to be loaded which happend every time any ecu gets mapped.
Once you got the crank sensor fitted and fixed the other issues then the car should be spot on starting, there is nothing in the map which changes the start conditions or immo status only power when the turbo is on boost.
The only thing a map can do is highlight under laying issues hardware issues, and clearing fault codes and restoring fuel trims ADD/MULT back to zero will also highlight fuel issues, starting issues, faulty maf ect..
If you have more under laying issues which have not come to light then these can lead on to warm/cold start issues, ECT, AIT Thermostat ect.. Once you got all the bits fitted and fixed your welcome to pop down to have it all check out again and logged on the dyno to make sure there are no more silly underlaying issues and we could have more time to chat over some hobnobs..lol
When custom mapping on the dyno we dont use generic maps we are actually tuning the cars logging and getting our heads around the setup, some cars come in with unique setup ARZ ko3s with stock side mount, fuel ect.. we have to log and make our mind up what power is safe maxing the power out across the whole band would not me safe so we compromise, we found you car made good easy peak power and flow which we worked out and limited the peak torque to stop major heat build up at the top end, if there where flow issues high up we would have worked on the midrange power. but you car was unique and the setup you got was the safest. We also limit torque if the car is seeing a lot of corrections on the timing, so if running cheaper 95fuel we can only tune with this fuel, if running v-power we can tune more. The issues with the ARZ is that the me7.1knock control mapping is not as good as the later Me7.5 ecu in the AUM & AUQs so there is much smaller window for safe power.
When cars come in for generic remaps we have a 3hour window to talk chat have tea/coffee, banta, test drives in my car ect.. but if in for custom mapping then 3 hours located booked is used to test log and tune and maybe seem un-polite?? :embarassed:
You are booking our time to remap your car, in the past I have spent hours talking to customerd and cracking jokes ect which is good for PR, but means less time for mapping and logging the car, which imo is what counts and what we are getting paid for. Rob is always on the phone which rings 24/7, Jims is on the dyno and I have to get my head around the car, logs, mapping, questions from rob and the feedback from Jim in the car. If the mapping goes smooth and there are not major issues tuning or no faults which we have to pin point ect... Then we tend to bring customers in to the workshop when its safe and show them the actual mapping, live data logs, ect if we have time and we know the car is right.
Its not our mapping going down hill or customer support, its just we are spending more time on the rolling road with each car and less time chatting while working. In the past customers could come in to the workshop and stand close and chat, but due to H&S issues and liabilty policy issues we have to have customers outside workshop while a car is on the ramp and dyno. If it was down to me I would have customer in the workshop all the time taking videos and picture and getting a buzzer from the sound and smells.
But now we have a crappy portacabin with old TV an magazines as a waiting room, we are not like big tuners with fancy waiting room, playstation, sky tv, sales staff which have free time to chat but charge £500 for custom maps. Swings and around abouts.
I am sorry if you felt let down by the level of conversation and feedback during the mapping session, but me and Jim had good intentions of getting your ecu software and engine spot one and safe with what we had to work with in the session.
Nick
