What causes a 4cyl engine to loose power on acceleration?

Hyundai SantaFe 2012 4Cyl 2 4L OEM Factory SHOP Service manual Download...


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crankshaft position sensor...when its bad the engine shuts down..might restart after cooling off, but sensor needs to be replaced.

shaking?
that means the engine stalled.
when the engine stalls. (do a tune up)
as the engine misfires, grossly , the 4 cyl . engine will shake.
and then it stalls
and many cluster lamps glow, CEL lamp. and charge glow.
you failed to look at engine RPM its wrong.
the normal hot RPM is about 800RPm for most cars.
and the engine EFI brain regulates there.
if the ECU brain can not regulate RPM at 800 that means you have gross misfiring, (lots of causes)
#1 cause, not doing tune ups, (aka, the 60k service points)

It all depends if its a 4cyl(has 4 injectors), 6 cyl(has 6 injectors) or a 8 cyl(has 8 injectors)

He didn't tell you that part?

Yes, you would have to change the entire harness and engine computer cause a 4 cyl computer will not run a six cyl

Yes, that actually was an option for the jeep. A 4.0 inline 6cyclinder. Should be pretty straigh forward

The 4 cyl does not have a PCV or EGR. There are a few reasons this could happen, drain plug loose, oil pan gaskets or bolts loose or broken, front cover gasket loose, crankshaft front or rear oil seal leaking, oil filter looseworn valve stem. Check all you fittings before checking these next three. Piston rings not installed right, piston and cylinders worn excessively, damaged oil pressure switch. I know this is long, but in my experience it is usually a loose bolt or fitting. Hope this helps

You didn't say what size engine you have, 4cyl. or 6 cyl.
The 4 cyl. is--- 1-3-4-2
The 6 cyl 3.1 is---- 1-2-3-4-5-6----- on the coil pack under the exhaust manifold is----- 1-4-6-3-2-5. If neither of these doesn't work, then you have a different engine.

the 4 cylinder has a different trans bolt pattern than the 4.3 so no the 4 cyl will not bolt up to the 4.3