5.0 harness....is it hard to wire in?

tamadrummer88

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Aug 9, 2006

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I was reading the instructions for the harness from fordfuelinjection.com, and the directions look a little complicated. but, a lot of people say its easy. When i first start the motor, what should i go about doing before i crank it over after the conversion is done? what should i do before hand, or what should i expect while the motor is running for the first time? other important things i should take note of before i start the conversion?



John

 

tamadrummer88

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anyone?



John

 

stangonline

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#3

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They rarely idle on their own at first. Usually, you need to adjust the TPS and idle screw - even then they can hunt for idle a little bit. Make sure you have either a new, or very clean IAC valve (funky thing on the side of the throttle body). I dont have my favorites handy on this machine, or I would post a thread - but there are many threads about setting idle and TPS - you should have no trouble finding one.

Good luck man

 

tamadrummer88

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one guy told me to kinda tap on the MAF to get the best voltage. I just hope that i dont have any problems at first. Guess then ill just play around with TPS and idle screw.


John

 

tamadrummer88

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also could i use my old water pump? i have a serpentine pulle set that the guy is selling me for my crank, PS pump, alt, and water pump. should i get a new MAF or get a used one?


John

 

Hack

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Aug 10, 2006

#6

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Serpentine setups usually require the newer reverse rotation style water pump. Look at the belt routing and if the wp rotation is reversed you need that style of water pump.

 

stangonline

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It so happens that I have an almost new eledbrock 5.0 waterpump for $100. It's squeaky clean - engine torn down shortly after it was installed...its even in the original box.

 

yeloxr7

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#8

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If you know how to work with automotive wiring, have a wiring diagram for your car and can follow instructions, wiring a fuel injection system into your car is not that difficult. This book http://www.amazon.com/gp/product/08...5807/ref=pd_bbs_1/104-4076379-6953511?ie=UTF8 was a valuable aid for installation and troubleshooting when I converted my 79 Mustang Pace Car Replica from 2.3 Turbo to 5.0 EFI. BTW it fired up, idled and ran well from the get-go.

Make sure all grounds are good and that the 61-pin connector to the processor box is secure. The plastic cover for this connector is important for pressing the wire ends to the pins on the computer. Securing the connector with zip-ties also helps.

Also it is a good idea to use a later-model starter solenoid. This is the one with the terminals on the end of the cylinder. It has a diode built into it that will protect the computer from power surges.

 

J

jmenke

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Aug 10, 2006

#9

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I second the Probest book Yeloxr7 called out.
It'll help with the wiring, and includes how to pull the codes and what they are without buying scanner.
I had 7 codes to clear after I did the conversion in '97.
I had a bad barometric sensor, bad TFI module (I don't recommend a mallory EFI distributor) and an issue with a ground wire that would sometimes open.


If I were to do it again, I'd get the complete harness, computer, with all sensors from a car I knew was operational though.

 

tamadrummer88

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#10

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well, I just got a distributor with a TFI module from a guy yesterday that was working when he puled it off the car. Does the barometric sensor come on the harness or is it a sensor that i have to buy myself? Im already gonna get the harness from fordfuelinjection.com. I almost have everything i need, just missing the mass air meter, ECU, return style sending unit for the gas tank, and the harness.


John

 

Lst1stndng

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Aug 10, 2006

#11

• Aug 10, 2006

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I am glad I found this thread. Thanks for the book suggestion. As for the sending unit, try mustangsplus in CA. I bought mine from them and it fit beautifully.

Dave

 

yeloxr7

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Aug 11, 2006

#12

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Most harnesses consist of just the wiring and connectors. Sensors are separate.

 

tamadrummer88

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Aug 11, 2006

#13

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dos anybody have some pics of what a few of the sensors look like, like the barometric pressure sensor? Also, im using long tube headers, and the instructions for the fordfuelinjection harness states to use 16.5 in long oxygen sensors!!!!!! is there really oxygen sensors that long?


John

 

yeloxr7

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#14

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The Probst book explains what each sensor does. I can't remember if there is a picture of each one.

02 sensors are fairly short, about 3" long total. This measurement you have been given may be the length of the connecting wire or just .

 

tamadrummer88

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#15

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yeloxr7 said:

The Probst book explains what each sensor does. I can't remember if there is a picture of each one.

02 sensors are fairly short, about 3" long total. This measurement you have been given may be the length of the connecting wire or just .

Click to expand...

I think it could be the length of the wire, it says to use a SG40 oxygen sensor.


John

 

P

Protowrxs

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Aug 12, 2006

#16

• Aug 12, 2006

• #16

Read this first.. (what you started with above)... the whole thing. I had to read it about 3 times to finally fit the concept together.

http://fordfuelinjection.com/?p=1

Sensor specific info is here:
http://fordfuelinjection.com/?p=10


I have everything except inertia switch and O2 sensors and a couple relays but have a while before I have an engine built to run it on.

Edit: Here are a few other EFI links I've used;
http://www.protowrxs.com/Nolen/Stang/default.asp#efi

-Stephen