they are both mpfi. the only thing i can think of is that the map and the purge valve are closer to the strut tower. but they still remain attached to the firewall. little more to the left from standing in front of the engine. also, some hfs came with egr valve, meaning another extra connector for the vacuum switching valve, other than that, i cant think of anything else.
454 t56 6 speed trans 1971 chevy custom 10 (7.4L) bad ass toy h22a4 89 ED8 HF on the works d16y8 91 ED6 DX daily driver stock ass DPFI 88 ED8 gas saver
does any one have a write up on how to use a si engine harness in a hf car help
Really no reason to do this unless your hf harness is bad and a Si is what you have to replace it. Everything pretty much hooks up exactly the same. I dont know where any write ups is for installing harnesses. You might be able to go under SEARCH and type in CRX HARNESS DIAGRAM. Hope this helps
88 Crx Dx- Sold 89 Crx Hf- Rip (parts car) 90 Crx Si- Current 91 Crx Si- Newest addition to the family