Out with the old... an L-Jetronic M20b20 connected to a 3 speed automatic gearbox:
And in with the new... High comp M20B25 with sport C/R gearbox. The engine has been upgraded to accept the facelift loom and ECU:
The engine is now in place and the loom on the car has been modified to accept the round C101 plg (thanks to willnz for the wiring guide, and ricey46 for doing the soldering/heatshrinking - it all looks very OEM).
Once the engine was in situ we decided to give it a test fire, and it runs - but there is some serious backfiring going on!
The strange thing about the 2.5 engine is that when we originally stripped the front end to replace the timing belt etc, we noticed that the timing on the car seemed to be off by a tooth or two. This was reset to standard when we put the new belt on.
Could this be the reason that the car is backfiring now - is there any reason why the timing on the car would have been altered previously?
Or is it simply because the car was running with just the 6 branch on?
Or something else entirely?
