MKII Sumo - Ford V6 Upgrading from carb to Inj Engine

[Mike H]

Does anybody know how simple/complicated it may be to swap a V6 carb engine for a V6 Injection unit as mine's a little tired and there arent too many good carb V6 granda's about these days (were there ever any good ones !), although 2.9 injections appear to be pretty readily available ?

P.S I sure I'm going to get told go the V8 route but I dont think the MKII chassis will accept one without lots of work and with the body fitted it looks too hard - I'd love to be told this isnt the case, if so V8 here we come }>

[SimonP]

Hi Mike,
If I remember correctly, the wiring loom for the EFI system is pretty much self contained. With the aid of the Granada manual you should be able to see what external connections are required.
Follow each wire from the ECU on the wiring diagram, then check that for continuity on the loom.
In practice, the only wiring you should need to pay particular attention to is the power (permanent and ignition-switched) to the ECU, the EFI system relay, fuel pump relay, and the safety inertia switch that kills the fuel pump in the event of a crash. (Don't overlook the Earths!) as these will likely have to be relocated in the Sumo.
Haynes book 3344 "Automotive Engine Management and Fuel Injection Systems Manual" explains how the Ford EEC-IV system (and a lot of others) works, also how to test components and obtain fault codes without any special diagnostic equipment. (And an explanation of what all the codes mean!)

If you can use a multimeter, wire cutters and a crimping tool, you shouldn't have any problems.

If you have to join or fit spade terminals to any wires, use a ratchet type crimping tool and high quality crimps (AMP are one of the top quality manufacturers - you can get these from RS components over the net.)
Poor quality crimps (and especially those done with those nasty pressed-steel tool efforts) are what tends to give DIY auto electrical work a bad reputation for reliability.

It's not that bad after all!

Simon

PS- make sure the engine and EFI system works properly before you start hacking it up to transplant it!
Enter diagnostics to see if there are any fault codes (Haynes book 3344 if it's not in the Granny manual how to do this!) - could save you time, money, hassle and an MOT emissions fail.

[russell_ram]

Mike,

swopping the carb system for injection system isn't really the difficult bit. If you have a carb V6 it's likely to be the Essex based engine (3.0L or 2.5L), 2.9L are all Cologne based engines and I'm not sure if there was ever a carb version of that. These two are totally different. Particulary from your point of view, the exhaust manifolds are very different, so either your exhaust system won't directly join to the engine manifold castings or your tubular headers won't fit (which ever of those two applies to you). The engine mountings are also totally different between the two so you'll need to re-make them to suit. Cooling pipes etc will also need modifying to suit. Would it not be better to re-build a spare 3.0L carb unit then just do a direct swop?

The good news is I have one you can have for free (I am having trouble giving it away but as a hoarder don't want to bin it). It's 80K miles, ex '79 Scimitar GTE and complete less alternator (complete with good autobox).

The 3.0L carb is still the engine of choice for performance (and parts availability) over the 2.9L.

Russ

[Mike H]

Russ

Thanks for your feedback - I "unfortunaitly" have a a 2.8 colonge engine, which as you point out is very different - thanks for your offer of the Essex but I dont think I can use it a real shame as I like the sound of a few more "cubes" - aint that always the way x(

Mike

[pgoodrum]

Mike

you'll need to stick with the 2.8, the 2.9 is again different in the exhaust area - it has three exhaust ports instead of your two..... x(

Pete

[trevbeadle]

Mike,
I have the 2.8 injection engine (early)in my Sumo, think the main problem you will have is with the fuel system. Injection layout is high pressure from the tank to the engine components with a low pressure return line back back to the tank. You will need all the fuel components from the donor car (pump, filter, accumulator, pump electrical relays etc.).
Good luck.

[Mike H]

Thanks for the info guys - After nearly giving up, Ive stumbled across a recently reconed carb engine so I'm going to give this a go rather than trying to go down the injection route.