Mazda Repair Questions? Ask Mechanics for Answers ASAP
Have you checked what is missing .Spark ,fuel etc..
Spray ether down the throttle body when cranking over the engine .
Did you use new spark plugs .
What problem did you have with the old engine .
You use your head on this new block or did the block come with a new head also .
Came complete with timing chain set up .
or did you have to fit the timing chain .
When checking the plugs do a compression test .
If it came complete i'n sure the timing chain is correct .but a compression test will confirm this .
Yes injector circuit you can check with a noid light ..
Coils you just need to check that all are sparking at the plugs ,
Looking at the compression looks like the timing is off .
Do a wet compression test, if it comes up to 180 its rings, stays low timing off or valve not sealing,
then to check if timing or valve put each cylinder at TDC (valve rockers lose) and do a leak down test ,this will confirm valves . .
For a new block and head, compression is like an engine with 400.000 miles bad.
I would get in contact with the engine supplier and give them the compression readings
as said a good engine will have 180 psi even on all cylinders .
Just checking in to see if you still need assistance with this issue .
Kind regards Greg
Check for malfunction codes .
Could be a cam / crank sensor ??
But check for any new codes .
Crank engine\ for 10 seconds does the Rev counter show 250 rpm +/-50 rpm .
Okay these are all engine wiring harness connection codes .OCV, Fuel pressure regulator ,EVAP purge control valve ,
variable swirl solenoid circuit ,
All low circuit which means the wiring harness has a bad connection ,bad ground connection ,
short to ground ,Possible PCM malfunction, check all connections you had apart for the engine swap.
Do these checks then get back to me .
The RPM is not showing on the scan Tool in live data ,if not its the wiring harness as said or the Crank shaft sensor
If you are not getting a reading to the PCM then you need to correct the wires with the open which means there is a break in the wire .
Fix these two lines then the PCM should see the signal from the sensor .
Engine wiring harness .
To make sure you get tthe right part i suggest you go OE Mazda at the dealership ..
Going to reopen this for our auto electric techs .