I am working on my wiring harness for my '88, five speed, carbureted 350 project. No cruise control, no AC. Here's the wires I have picked out so far, is there anything else I might need? Also, does anyone know of a spare ignition hot wire that I could use to run my electric water pump? thanks

oil gauge-tan-pin E c203
temp gauge-dk grn/yel-c2 c500
temp light-dk grn-d3 c500
VSS-ppl and yel-G and R c203
Tach-wht/blk-C3 c500
alternator light-brown- B3 c500
fuel pump relay-org-pin B c203
Coil power-pink-E3 c500
alternator feed
crank signal for starter-purple-E2 c500

Use the INJ1 fused switched ignition power on C203 for your water pump if it's under 10A

With a 5 speed you need the reverse switch leads from C500. A blue wire is the switched power source and a green wire leads to the bulbs. The reverse switch itself is located on the tranny

You don't need to use the fuel pump relay. You can just use the oil pressure switch. Of course use an 88 or later.

If needed I can let you know the specific pins

[This message has been edited by phonedawgz (edited 03-13-2011).]

I'm not sure what you mean when you say I "don't need the fuel pump relay, just use the oil pressure switch"?

To power your fuel pump run from the battery, to the oil pressure switch and then to the fuel pump. No relay needed.

The Fiero oil pressure gauge sender also has a switch on it that closes when you have oil pressure. The stock Fiero wiring uses it as a redundant back up to the relay wiring.

Since you are running a carb, you don't need fuel pressure to start the engine.

Also if your existing fuel pump is a V6 fuel pump make sure you use a bypass fuel pressure regulator. A non-bypass fuel pressure regulator can not handle the high fuel pressure from the V6 pumps.

Alright, that makes sense. Do you have a pin number for that INJ1 wire on the c203? Thanks alot! -Mark

Pin J of C 203 - Pink Wire (might be pink with a stripe)

[This message has been edited by phonedawgz (edited 03-14-2011).]

Use a elec fuel pump from a 72 vega. It's for a carb, it will work and you don't need any thing but plumb it to the carb. It's a little shorter that the stock pump, but a 1 inch longer hose will fix that. I am useing one on my 350 carbed chevy duelly. You will not need a return line, regulater, or any other things that can leak and burn down your car.

I'd worry about the pressurized side of the line leaking and burning down your car. Specially with a V8 in a Fiero having a bypass pump and return line can prevent vapor lock.

quote Originally posted by phonedawgz: I'd worry about the pressurized side of the line leaking and burning down your car. Specially with a V8 in a Fiero having a bypass pump and return line can prevent vapor lock.

phonedawgz, Are you referring to the Vega pump causing the pressurized side of the line to leak?? I was under the impression that the stock 72 electric Vega Pump was something like 5.5-6psi stock. (Unless I'm wrong - since I was 5 years old in 1972 !!!_

Fierofred, I keep seeing those pumps listed as 1970-1976 Vega Electric Pumps but from what I remember, just the 1972 / early 73 electric pump (It was an option I think) were the lower pressure pumps for use with the carbs.

Which brand do you use?? I've considered using them in the past but could never get a firm part number or band to use.

Right now I use the 4cyl in tank Stock Fiero Pump with a Holley Bypass regulator (Ran the last one with a Holley Non-Bypass regulator and was just fine with the 4cyl pump). I've always used the Stock 4cyl pumps but it's nice to have another option.

[This message has been edited by 3084me (edited 03-14-2011).]

V8 Indy, I highly recommend using a relay for your electric water pump. It will take some stress off your
electrical system. I ran mine with only the inline fuse that came with it and it pop a bunch of times. With the relay
wired in it works great. G/L Ray

I plan to use a relay, I was just going to use the igniton hot wire to power the relay. How big of a relay should I use?
Thanks

How many amps does your water pump take?

I don't know, I got it off Ebay, it didn't come with any instructions or anything. Its made by Procomp Motorsports. It was new in the box and it seems like its good quality at least, but there is not instructions or ratings or anything with it.
This listing looks like the exact thing I have.

http://cgi.ebay.com/ebaymot...&hash=item45f8e3aa40

I think I used a pro comp style pump when I replaced it before selling my last car.

I think I have instructions out in the garage somewhere (Pretty sure of it). I'll check for the rating. I seem to think that they recommended a 15amp line but I may be wrong.

On the relay. I used an aftermarket one on my last build. I'm wiring my Fuel and Electric Water pump right now on the current build. I was just going to review specs on the Stock Fiero Relay and most like just use that. No need to re-invent the wheel and it should be suitable as it's powering the stock Fiero Fuel Pump (in my case).

[This message has been edited by 3084me (edited 03-15-2011).]

the vega pump does not need a return line or regulater. It didn't have one in the vega. I don't know about the other vegas, i had a 72 GT. the 75 ? vega with the dohc/elec fuel injection had more fuel presser. I just use what they have at auto zone. If you need to wire in the pump relay ( I would ) and you don't have the ecu, try using the unused post on the starter sleinoid that used to go to the points on realy old cars. that way you get a prime if the carb is empty. I tryed running a wire from the "S" terminal on it but the oil presser switch turned the starter on !!!!! I am running a ford sleinoid ( to control the TILDON one) because of bad wiring in the car. The ford one has the other small pin also.

As for back than, i got my DL in 1963. took drivers ed in a blue, 1964, 4 door, 3-on-the-tree, ford fairlane.

quote Originally posted by V8IndyProject: I don't know, I got it off Ebay, it didn't come with any instructions or anything.

My instructions are pretty broad. They state to use a fusible link with a rating of 10-30 amps.

How is that for broad??

I looked at some of my info from the other swap since I'm getting ready to do my Fuel and Water hook-up on my current project. I used a 20amp fuse that I wired into the existing panel (But I didn't make a note of what spot I used... Most likely the fuel injection spot I'm guessing.)

I think (Since I'm older and wiser now - Like to check "stuff") That I'll throw my amp meter in line with the pump during the first few test runs and see how much it draws and the "fuse accordingly".

[This message has been edited by 3084me (edited 03-15-2011).]