Some might say I'm crazy, and maybe I am, but that's what I've done!
Obviously, it's not as simple as just bolting it in and the job's not finished yet. The 3.5 motor is in and runs ok but has a misfire and won't rev past about 1600 rpm. As I open the throttle the revs start to lift then seem to hit a wall.
So, I started with my 3.5 and 4.6 motors side by side on stands and compared the two. What I've ended up with is a 3.5 block, crank, rods and pistons bolted together with the 4.6 heads on.
It's got the 4.6 camshaft in it and the block has been drilled and tapped to accept the camshaft keep and the timing gears, timing cover/oil pump/water pump from the 4.6.
I've turned some billet down to fit into the two central core plug holes on each bank. These are drilled and tapped to accept the knock sensors. They're a tight fit into the holes and I've gone round them with chemical metal for good measure.
I cut a hole through the web on the back of the engine and fastened the crankshaft position sensor mounting plate in there. I've used the adaptor plate from the 4.6 so that it's got the lugs on the engine side for the sensor to 'see'.
Well that's about it!!
So why won't it rev? I've had her running in the dark and can't see any arcing on the leads. It's got a new set of BPR6ES plugs.
My thoughts are...
Maybe the knock sensors are not reading right, so the ecu is retarding the timing right back?
Fuel problems? She does smell a bit rich.
Timing problems - maybe the crank or cam position sensors are not right?
Any body got any comments or suggestions?
No error codes stored in the ECU and all the readings look ok except the air flow value which is 0.07 g/s at 600 rpm and 0.12g/s at 1600 rpm. That seems a bit low, although I wouldn't know what it should be.
Obviously, it's not as simple as just bolting it in and the job's not finished yet. The 3.5 motor is in and runs ok but has a misfire and won't rev past about 1600 rpm. As I open the throttle the revs start to lift then seem to hit a wall.
So, I started with my 3.5 and 4.6 motors side by side on stands and compared the two. What I've ended up with is a 3.5 block, crank, rods and pistons bolted together with the 4.6 heads on.
It's got the 4.6 camshaft in it and the block has been drilled and tapped to accept the camshaft keep and the timing gears, timing cover/oil pump/water pump from the 4.6.
I've turned some billet down to fit into the two central core plug holes on each bank. These are drilled and tapped to accept the knock sensors. They're a tight fit into the holes and I've gone round them with chemical metal for good measure.
I cut a hole through the web on the back of the engine and fastened the crankshaft position sensor mounting plate in there. I've used the adaptor plate from the 4.6 so that it's got the lugs on the engine side for the sensor to 'see'.
Well that's about it!!
So why won't it rev? I've had her running in the dark and can't see any arcing on the leads. It's got a new set of BPR6ES plugs.
My thoughts are...
Maybe the knock sensors are not reading right, so the ecu is retarding the timing right back?
Fuel problems? She does smell a bit rich.
Timing problems - maybe the crank or cam position sensors are not right?
Any body got any comments or suggestions?
No error codes stored in the ECU and all the readings look ok except the air flow value which is 0.07 g/s at 600 rpm and 0.12g/s at 1600 rpm. That seems a bit low, although I wouldn't know what it should be.
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