Volvo C70 99 4k rev limiter manual gearbox

ToMasz224 · Post by **ToMasz224** » 22 Jun 2020, 08:45

misha wrote: 22 Jun 2020, 04:39 Live parameters from all sensors while engine is running and while driving the car...TPS,O2 sensors,Maf,ETM...etc.

Ok. I will check the parameters and insert the results. I remembered that sometimes after a hard ride an error occurs.

ECM-280A Front heated oxygen sensor (HO2S), bank 1- Faulty signal

After removal, it does not appear until the next sharp ride

The car is also powered by LPG

Post by **misha** » 22 Jun 2020, 11:57

LPG system can make things harder to track down.
They are almost NEVER installed properly and if it does...installers usually use short-cuts and splice the wiring to install some sensors which are needed for LPG.
Those splicing into wiring can corrupt signals for original(factory)sensors which are needed when engine is running on Petrol.

ToMasz224 · Post by **ToMasz224** » 22 Jun 2020, 14:22

misha wrote: 22 Jun 2020, 11:57 LPG system can make things harder to track down.
They are almost NEVER installed properly and if it does...installers usually use short-cuts and splice the wiring to install some sensors which are needed for LPG.
Those splicing into wiring can corrupt signals for original(factory)sensors which are needed when engine is running on Petrol.

I have been using LPG for 6 months and it is installed correctly. And today I found the reason for the turnover limit. ECU proved to be guilty. I exchanged ECU with C70 2.4 with a manual transmission and the engine exceeded 4k. It looks like the current ECU is not from a manual gearbox. I came to this conclusion after changing this ECU to C70 2.4 and here also had a 4k rev

Post by **misha** » 22 Jun 2020, 15:34

You didn't understand me well.
When splicing into original ecu wiring or adding a clone ecu box for LPG ecu....resistance and voltage for original sensors signal is corrupted(usually) or slightly out of range which makes problems when car is running on petrol.
It happens that car runs magnificent on LPG but have problems with running on petrol and vice versa.

Anyway...glad that you solved your problem....but still can't understand how the '99 car runs or even starts with swapped ecu when they are "married" with the car via CAN network.

1st barrier is chipped key....with swapped ecu from another car it shouldn't be able to start at all because immo,cluster and ecu needs to be matched.