efi conversion complete sucess!

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escortwgn

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3.5 yrs, 6 4 barrel cards, engine overhall, trans rebuild, engine swap, unknown number of starters, countless small repairs, new wiring harness...........today efi powered 84 bronco! i had enough of the carbs every single one i put on the truck and rebuid kits they would all fail with in 1 to 6 months. they'd all break in a different way, a crack, warped in some fashion. all would need to be replaced in the end. purchased the edelbrock pro flo series 1 efi kit for the 351w. had a pro install it. but whats nice is it comes with everything to include the hand held interface. i can change the timing and spark advance all with my fingers. i have a lot better responce no power surging or back firing oh and better mileage. not sure what it is at the moment but i have already added 100 extra miles to my tank. but since then i've dialed the fuel back so it's not running so rich. but with the history of this bronco she can't be stopped! my only problem is that stupid front seal again, and brakes. i put some stop leak in to help slow it down seeing how it's going to florida with me all next week. but i know some of you were asking for updates for the wiring harness and efi upgrade. i'll get some pics uploaded here shortly.

 
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escortwgn

escortwgn

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ok well it was a bit early to jump for joy......on my way down from sc to fl i got around half way and everything started going nuts. intake temp was hitting 130f fuel was getting really lean, loosing power, and back firing from both ends....not as bad as carb tho. i had this thing tuned good in sc, is it possible that the computer for efi would be leaning out the fuel due to high temp? cause i played with it sunday got it running good again, no popping, was able to floor it with no issues until i capped the gas tank breather. i guess what i'm asking is if i got a cold air intake would that make a big enough difference for the computer to stop leaning out on the interstate at 70 mph?

 

Broncobill78

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well, I'll be the first to admit that I'm no EFI guru & what I DO know about them relates to the factory systems not the aftermarket ones. First off though I don't think putting one of those cold-air intakes on will do Jack (you're talking about one of the cone-filter deals that replaces the airbox right ?) The companies like to make horsepower claims about them and I suppose if you have a dyno handy you might be able to document a few ponies but it won't be anything dramatic, it won't be anything you really feel and I don't ever remember somebody telling me about a problem they had with their car/truck that was *solved* by installing one. Mostly guys just like the way it changes the exhaust tone.

I'd start by trying to understand just why the engine is getting so hot. Are you running a fan shroud ? Is your fan driven directly or thru a clutch ? What kind of shape is the radiator in & are there any obstructions ?

That Edelbrock EFI wasn't cheap, they have a tech department. Let them earn the price they charge and start calling them for troubleshooting advise

It's leaning the fuel out for a reason, either something is bad or installed incorrectly or something external is causing the computer to try & compensate for what it thinks is going on. The Edelbrock nerds will be able to tell you what conditions will cause the computer to take fuel out. Make a list and start running them down one by one.

Either that or just bring it back to the guy you paid to install it :) /emoticons/[email protected] 2x" width="20" height="20" />

Let us know how you make out.

 
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escortwgn

escortwgn

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no it wasn't one of those coned shaped intakes. it basically the original round filter but completely enclosed with 2 hoses that run to the front where it doesn't **** in the engine air. so far it's running around the ambient temp verses 130 at running speed. but i did have some gummed up spark plugs and the gap was wrong on them. it goes in tomorrow for the front seal replace and an oil change. i'm getting a 14-15 inch vacuum at idle, compared to the 96 302 bronco at 16-18 inch. i do have someone to look at it back home. as long as it makes it back up there i'll be fine it's just making it outta florida away from the heat......

 

shift1313

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Do you have an idea how the fuel delivery computer is setup? Is it alpha N? or is the system using tach, coolant temp, intake temp/baro etc. What can you adjust? Is it leaning out your AF ratio or kicking the timing up? do you have any graph or gauge on your input that you can watch.

 
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escortwgn

escortwgn

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not sure what it use's to calculate a-f ratio. i know the fuel and spark changes throughout the rpm range. but i discovered something when i got back up to sc. theres a mod to control spark and fuel after idle. the instruction book is hard to understand and the folks who installed it was just "play with the settings one at a time" so now i can adjust it while driving and will feel the difference. the "cold air" i put it works as long as it's in motion. the body picks up too much heat if at idle plus its around 15-20 degrees above ambient so it'll still adjust too soon. but i can peel out now tho. couldn't before with the last settings and carb! i just need a trans upgrade....5-6 speed i hope

apart from mine being just pro flo 1

efi kit

 

fig1072

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I have been wanting to do the same thing. I don't mean to be rude, but what did the efi setup cost? I have plans for rebuilding my 351w and want to use the same setup.

 

89Bronco58

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The stock efi setup will work fine if you just want to make your 351w fuel injected, they can flow well till about 5 grand, thats including mods like heads and cam ( if u have them ) you dont have to spend a ton on an aftermarket efi system. You could get one from a junkyard cheap. That is if all you care about is having it be EFI, but remember, the 302 and 351 efi is different, so is the computer and wiring harness, firing order and all that, so make sure if you DO get a junkyard setup, its from a 5.8 truck

 
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escortwgn

escortwgn

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I have been wanting to do the same thing. I don't mean to be rude, but what did the efi setup cost? I have plans for rebuilding my 351w and want to use the same setup.
my kit was about $2700 through summit. kit was for the 351. i would suggest if you go through edlebrock, that's my kit, get the proflo 2 series. i got the first series. the 2 has a learning computer and you get plug it in to a computer to download mods in to the ecu directly to the truck. makes for an easier tuning process. the install was $1800 about at a weeks time. to me it made a world of difference. good luck!

 

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