I bet it's been asked before, but I don't remember seeing it recently. Anywho, what's the difference between EFI, CFI, and Carb? I know what the difference between EFI and Carb is, but not EFI and CFI or CFI and Carb. So basically what does Cfi stand for and how does it work and relate to EFI and Carb?
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88 Town Car (wrecked, for sale)
Walker OEM duals with muffler deletes -
CFI is Central Fuel Injection...
it's much like a 2bbl carb, only instead of barrels, it has injectors.
whereas EFI has the injectors in the lower intake manifold, spraying directly into each cylinder.
I consider CFI a hybrid between EFI and Carb. "Carbureted Fuel Injection" if you will...Last edited by Mr. Land Yacht; 07-28-2006, 03:20 PM.sigpic
1989 Ford Crown Victoria
99K -
Great question, due to i was woundering the same demn thing
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People should not be afraid of their governments. Governments should be afraid of their people.Comment
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Electronic Fuel Injection (EFI) is a general term that covers many types of fuel injection, like Central Fuel Injection (CFI), MultiPort Fuel Injection (MPFI)and SEquential Fuel Injection (SEFI)
a carb is just a carb... no relation. The VV carb was an attept at an electronicly controlled carb...Pete ::::>>> resident LED addict and CFI defector LED bulb replacements
'LTD HPP' 85 Vic (my rusty baby) '06 Honda Reflex 250cc 'Baileys' 91 Vic (faded cream puff) ClifFord 'ODB' 88 P72 (SOLD) '77 LTDII (RIP)
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85HPP's most noteworthy mods: CFI to SEFI conversion w/HO upperstuff headers & flowmasters P71 airbox Towncar seats LED dash light-show center console w/5 gauge package LED 3rd brake light 3G alternator mini starter washer/coolant bottle upgrade Towncar power trunk pull underhood fuse/relay box 16" HPP wheels - police swaybars w/poly rubbers - budget Alpine driven 10 speaker stereoComment
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Some people refer to sefi and mpfi as the same thing, but are they different? Were the 86-91 5.0 engines referred to as MPFI engines and the newer panthers 92+ use SEFI on the 4.6?Current rides - 1991 Ford Thunderbird 3.8 v6 (gas saver/DD) - New Heads/Headgaskets with ARP studs, Air Silencer Delete, 70mm MAF, Plasti-dipped Matte Black with a Silver Metalflake Overlay, Muffler Delete, some LED's, 30.233 MPG for high MPG average!
2006 Jeep Wrangler 4WD (fun vehicle/backup DD) - 4.0/6spd - too many mods to list.
Associated Panthers:
Father's 1994 Ford Crown Victoria - Stock, 45,000 miles.
Sold in 2007 - 1987 Mercury Grand Marquis LS "Grandpa Special" 2 door.
http://www.cardomain.com/ride/2128327Comment
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I'll ask the stupid questions around here, son. JK, love how no one here judges when someone like me posts dumb questions, or the same question multiple times (short term memory prob.?).
1991 Crown Victoria LTD, Puff the Magik DragonComment
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i think MPFI is different from SEFI in the way it fires the injectors... I dunno when it changedPete ::::>>> resident LED addict and CFI defector LED bulb replacements
'LTD HPP' 85 Vic (my rusty baby) '06 Honda Reflex 250cc 'Baileys' 91 Vic (faded cream puff) ClifFord 'ODB' 88 P72 (SOLD) '77 LTDII (RIP)
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85HPP's most noteworthy mods: CFI to SEFI conversion w/HO upperstuff headers & flowmasters P71 airbox Towncar seats LED dash light-show center console w/5 gauge package LED 3rd brake light 3G alternator mini starter washer/coolant bottle upgrade Towncar power trunk pull underhood fuse/relay box 16" HPP wheels - police swaybars w/poly rubbers - budget Alpine driven 10 speaker stereoComment
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MPFI just means multiport fuel injection. Its actually what GM called thier system. SEFI means sequential EFI, which means the injectors have a firing order. Each injector fires when that cylinder is on the intake stroke. There is also batch-fire injection which also uses 8 injectors. Ford trucks use this system. The injectors are wired in banks of 4, and they alternately fire.86 Lincoln Town Car (Galactica).
5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley
91 Lincoln Mark VII LSC grandpa spec white and cranberry
1984 Lincoln Continental TurboDiesel - rolls coal
Originally posted by phayzer5
I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers
Everything looks like voodoo if you don't understand how it worksComment
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