Overfuelling solved
Discussion
Had a huge overfuelling problem with my new Griffith.
Solved it finally. So here's my story.
Bought a lead for the engine management to find out what is wrong.
When engine is warm both lambda's where at 0 volts (so telling the ECU to enrich). Buth both lambda's to give faulty readings, couldn't believe that.
Found out that the lambda's were fed with 12 volts. But with a running engine the power was cut off en therefore telling the ECU to enrich.
Decided to feed the lambda's with a wire direct from the battery. Then they both started working!
When measuring again I found out that even with ignition off the lambda's were fed with 12 volts. (Aha, that was draining my battery !)
So in some strange way the power to the lambda was just working the wrong way around. They are fed from the fuel relay which seemed to working fine so how was that possible.
Turned out that a normal relay and the (brown) fuel relay were switched. The fuel realy is different from the others (all others have a 87 and 87a connection, the fuel relay has a 87 and 87b connection). Swapped it and turns out to be fine !
Time to move on to the others things I have to solve before getting it on the road !
Ronald.
Solved it finally. So here's my story.
Bought a lead for the engine management to find out what is wrong.
When engine is warm both lambda's where at 0 volts (so telling the ECU to enrich). Buth both lambda's to give faulty readings, couldn't believe that.
Found out that the lambda's were fed with 12 volts. But with a running engine the power was cut off en therefore telling the ECU to enrich.
Decided to feed the lambda's with a wire direct from the battery. Then they both started working!
When measuring again I found out that even with ignition off the lambda's were fed with 12 volts. (Aha, that was draining my battery !)
So in some strange way the power to the lambda was just working the wrong way around. They are fed from the fuel relay which seemed to working fine so how was that possible.
Turned out that a normal relay and the (brown) fuel relay were switched. The fuel realy is different from the others (all others have a 87 and 87a connection, the fuel relay has a 87 and 87b connection). Swapped it and turns out to be fine !
Time to move on to the others things I have to solve before getting it on the road !
Ronald.
That makes sense- the Bosch relays look like standard change over relays, but they are not, Instead of switching one or the other terminal when energized, they switch both the output connectors to 12 volts together. In you case the "changeover" relay was removing power instead of adding it to the lambda heaters.
Gassing Station | Griffith | Top of Page | What's New | My Stuff