Viper tuned TCU
Re: Viper tuned TCU
So been a while since I tried to sort this problem and now its time to get it sorted so would I be best to take it to a tuner and get the TCU sorted ? APR said they would do tcu and ecu for 1500 bangers lol
Re: Viper tuned TCU
I just read through the thread again. It's a weird one.
In the photo of the TCU PCB you posted, it's the chip at the top right that is replaced. Is there any sign at all that the soldering isn't factory?
You sure you were able to go into 5th at 30mph before? Don't think my Viper TCU lets me do that, but I haven't checked for years. Certainly my MTM one doesn't.
In the photo of the TCU PCB you posted, it's the chip at the top right that is replaced. Is there any sign at all that the soldering isn't factory?
You sure you were able to go into 5th at 30mph before? Don't think my Viper TCU lets me do that, but I haven't checked for years. Certainly my MTM one doesn't.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: Viper tuned TCU
MTM must of done some different TCU tunes. Mine is MTM and it goes into 5th at 30. I would rather it didn't as it feels to low in revs.
Re: Viper tuned TCU
Yeah, I think it became "fashionable" but I never wanted it.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: Viper tuned TCU
Sorry for the late reply lads yes it definitely was 30 in 5th, I hear you when you say you wouldn't like it and to be honest I am not a fan of it either but the map was more than that and that's the bit that I'm missing car was completely different when the map was there 
Re: Viper tuned TCU
I think it’s unlikely anything has changed in the TCU. Most likely is that it’s reacting to different torque calculations based on different data from the ECU.
I would go back and look at the mixture and ignition timing. Maybe you’ve still got a small leak somewhere.
I would go back and look at the mixture and ignition timing. Maybe you’ve still got a small leak somewhere.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: Viper tuned TCU
Can you do a close up of the chip above the chip that has F41 on it? Should be able to see if the chip has been changed by looking at the solder joints.
Are the solder joints on this chip more shiny than all the other chips?
Re: Viper tuned TCU
I did read somewhere that you can reset the TCU using the accelerator and key. Might be worth a Google.
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simonpoulton
- 3rd Gear
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- Location: Essex
Re: Viper tuned TCU
Definitely worth checking over the MAFs to see if they are new or original as they are used as part of the engine load calcShoppinit wrote: ↑Wed Oct 14, 2020 7:37 pmI think it’s unlikely anything has changed in the TCU. Most likely is that it’s reacting to different torque calculations based on different data from the ECU.
I would go back and look at the mixture and ignition timing. Maybe you’ve still got a small leak somewhere.
Current: RS6 C5 Avant, E60 5 Series, '78 Mini (Queued for restoration)
Past: R56 Mini Cooper S
Past: R56 Mini Cooper S
Re: Viper tuned TCU
Cheers everyone, I will have a look st the mafs and check for any leaks as suggested.
Gearbox been playing up the last couple of weeks as in on the dash the drive doesn't lite up or its all red...no banging into gears or anything like that so I'm just looking thru all threads related to this and see if it needs a sensor replaced or wiring harness. Box has always been serviced every 40k last one was done last year.
This has just started so I wouldn't think its connected with the map on it.
Gearbox been playing up the last couple of weeks as in on the dash the drive doesn't lite up or its all red...no banging into gears or anything like that so I'm just looking thru all threads related to this and see if it needs a sensor replaced or wiring harness. Box has always been serviced every 40k last one was done last year.
This has just started so I wouldn't think its connected with the map on it.
Re: Viper tuned TCU
Whats the normal min speed to get 5th?
Managed to get mine to sneak in at about an indicated 38 earlier, which seemed plenty slow enough. Can’t think I’d ever want to do it other than to see if I can, give me 2k rpm and some boost please.
Managed to get mine to sneak in at about an indicated 38 earlier, which seemed plenty slow enough. Can’t think I’d ever want to do it other than to see if I can, give me 2k rpm and some boost please.
"not a professional engineer, mechanic and mechanist"
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Foxmeister
- 4th Gear
- Posts: 516
- Joined: Wed Feb 24, 2010 1:37 pm
Re: Viper tuned TCU
Aye, mine does it just around 40mph and it really growls low down V8 rumble goodness, cant see why you'd want it to do it at 30, seems like it would labour to me
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