Fawad85 Posted October 31, 2010 Report Share Posted October 31, 2010 hello all i have ke70 in cng gas car is better silent, in petrol engine vibrate whats the problem my car show him all expert but have no solution for that in first time when we put new 7kc engine in ke70 on that time tha person can't fit 7k computer then they fit 4e computer.whats the problem computer problem or wireing problem.. Quote Link to comment Share on other sites More sharing options...
Evan G Posted October 31, 2010 Report Share Posted October 31, 2010 could anyone else make sense of he just wrote? 7kc in a ke70, runs like poo on petrol but fine on gas? your running a 4e computer not a 7k computer? Quote Link to comment Share on other sites More sharing options...
altezzaclub Posted October 31, 2010 Report Share Posted October 31, 2010 (edited) I think that is it Evan, so the problem is that the ECU is giving far too much advance and it runs badly on petrol. Gas will take more advance so it runs better on CNG. Of course it could be that the 4E ECU is just providing anough fuel to run a 1300cc 4E motor not a 1800cc 7K motor! So it runs smoothly but pitifully slowly on CNG! Fawad these computers can't be just swapped around, as they have maps for each motor and they can be quite different. You might have to buy an aftermarket ECU that you can program, or get a 7K ECU from overseas. I assume you're not in Aussie! Edited October 31, 2010 by altezzaclub Quote Link to comment Share on other sites More sharing options...
TRD ke70 Posted October 31, 2010 Report Share Posted October 31, 2010 7KC with a ECU?? That doesn't quite make sense. So does it have a carby or an ECU?? Quote Link to comment Share on other sites More sharing options...
Fawad85 Posted October 31, 2010 Author Report Share Posted October 31, 2010 soory trd ke70 bro i can't understand your question whats u ask that does it have a carby or an ECU?? bcos i am not too much expert in car. Quote Link to comment Share on other sites More sharing options...
TRD ke70 Posted October 31, 2010 Report Share Posted October 31, 2010 yeah, is it EFI(ECU) or Carby? Quote Link to comment Share on other sites More sharing options...
Fawad85 Posted October 31, 2010 Author Report Share Posted October 31, 2010 efi Quote Link to comment Share on other sites More sharing options...
TRD ke70 Posted October 31, 2010 Report Share Posted October 31, 2010 (edited) the injectors may need cleaned, if the engine hasn't been on petrol for a while. If it is running good on CNG then it is fuel related, this could mean your ECU is not right and needs to be changed. It's not a good idea to use a ECU for a different engine. Try to find yourself an ECU for a 7KE. Edited October 31, 2010 by TRD ke70 Quote Link to comment Share on other sites More sharing options...
Fawad85 Posted December 6, 2010 Author Report Share Posted December 6, 2010 still same problem bcos here is another car i see who have 7k engine ecu was 4e not giving any problem in petrol.. Quote Link to comment Share on other sites More sharing options...
altezzaclub Posted December 7, 2010 Report Share Posted December 7, 2010 Still lots to check- Is their 4E computer exactly the same as yours? Same year, same computer model, same software, same sensors.. Is your 7K setup exactly the same as his? Injectors, gas pressure setup, ignition, water temperature... too many things can be different and affect the motor. I think an electronic engine diagnosis will be the only way to find out what is happening. Quote Link to comment Share on other sites More sharing options...
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