Motor Vehicle Maintenance & Repair Stack Exchange
Motor Vehicle Maintenance & Repair Stack Exchange

Questions tagged [ecu-mapping]

12 questions
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Do automakers ECU-tune their motors to make new models and versions?

I am considering ECU tuning my car (landcruiser 150 2.8 D4D) and have been reading about the issue. Someone told me that automakers frequently use the same motor across models and versions, yet it ends up having different power. This seems to…
user1721135
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ECU tune file formats

I'm new to the ECU (or chip) tune concept, and I try to understand what is going on there. I understand the concept and the goal, but I'm having difficulties to understand what is actually going on there. From what I understand the process for…
macro_controller
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What is choppy throttle response and bad fuel mapping and can it be fixed?

I'm looking to purchase a motorcycle and according to it's wikipedia article it has two major flaws: Being the company's first fuel-injected 600cc sportbike, the initial 2000 model had choppy throttle response and bad fuel mapping, leading to…
1.21 gigawatts
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Considerations for a successful VW 2004 Jetta 2.0L engine swap in place of a 1.6L engine

Vehicle make: Volkswagen Model: Bora Year: 2004 Issue: Swapped the 1.6L for a 2.0L. No programming of the ECU was necessary neither was a change of ECU necessary until vehicle started misbehaving - that is to say, vehicle would refuse to start.…
ElectronicsNewbie
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What kinds of tuning can ruin a car's ability to pass emissions testing?

Suppose I want to tune a car for performance, like doing an ECU re-map for a Toyota Supra. Could this affect the car's ability to pass emissions testing? If so, how? And in general, what kinds of tunes will / won't jeopardize a car's ability to pass…
Asker
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How accurate is the air-fuel-ratio set by the ECU?

I am analyzing the CAN, OBD and sensor data from my motorcycle (modern bike with throttle by wire, CAN-Bus, etc.) and I plan to measure some of the sensor data, i.e. the intake air temperature. Currently this is a just for fun project. Now I wonder…
Edgar
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Why there is VE map if MAP sensor is available

Recently I'm digging deeper into motorcycle EFI topics and I'm not quite sure what is the relationship of VE table and MAP sensor. I'm trying to figure out why ECUs need VE table if they have MAP, throttle and temperature sensors available being…
basstradamus
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Uploading a tuning file to my car

I would like to remap my car myself. I will be buying a tuned map from mychiptuningfiles.com for my Ford Focus 1.6 TDCI so I only need to download my stock map and upload the tuned stock map. What cable and software do I need to be able to do this…
Fords
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EGR switch off and reprogrammation only

I would like to close my EGR valve so that only "fresh" air is in the comubstion chamber. I read my ecu file (EDC15c2 on Puegeot 307 2.0 HDi 90hp) and I located the three bits "EGR Swtich with/without". They are by default equal to 001 so I will put…
prolea
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EGR ecu map and its consequences

I located the EGR map to my car Peugeot 307 2004 2.0 HDi 90hp 8cv manual with ECU Bosch EDC15C2. Regarding the EGR map, there is one axis for the rpm. What is the physical meaning of the second axis (I suppose it's in mm3) ? Is it the quantity of…
prolea
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Should I retard the ignition timing on higher RPM on natural aspirated engine?

I'm confused whether I should advance or retard my scooter ignition timing on higher RPM (> 7000 rpm). When I open the default stock ECU settings, it seems retard the timing excessively on wide-open throttle, but the principle said that I should…
reptildarat
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Understanding ECU hex changes for language change

Is there a way to understand the ECU files hex changes applied by the software? I'm new to ECU files and struggling to understand possible areas of interest in the file. For example, when the language change operation was performed on Prius (through…
Zeeshan
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