Fuel Pump

[RDSPYDR]

I have an '81 FI Spider and the fuel went kaput Friday when driving around. I was wondering if there was a crossover part number that would would on the car.

The fuel pump prices brand new at IAP was over $200.00 and was hoping to spend a little less than that.

Any help would be appreciated.

[rlux4]

Are you positive that the pump went bad RD? Was it making noise or acting funky just beforehand? A lot of times it's the inline fuse that supplies power to the fuel pump through the dual relay that looses good contact. Or dirty/corroded connections at the pump connections. You can check the power for the pump by putting a test light at the brown with white wire at the dual relay and turning on the key. Sometimes just a visual inspection of the fuse doesn't show a problem with it. I replaced the factory fuse holder with a new one that uses the standard AGC fuse and it solved my car's problem of losing power through the brown with white wire intermittently.
Ron

[RDSPYDR]

Where is the inline fuse located ? I will look in my books tomorrow for the relay.

Thanks. I am still learning about the Spider.

[rlux4]

It is tucked up behind the main fuse panel. It is on a brown wire with a white stripe. It may take some searching if you're not lucky, mine was hidden up behind a stiffener plate. The in line fuse holder, if it's still original will be red if I remember correctly. When you find it I recommend that you cut it out and replace it with a modern type replacement because of my experience. The fuse would look fine, but not be good. Or the fuse holder itself would not make contact. The wire goes from there over to the other side of the dash to the dual relay, a vital component of the FI system. It's on or near a metal plate up under the glove box. The metal plate holds relays and is in front of your ECU.
Ron

[RDSPYDR]

When I disconnect the fuel line from in front of the fuel filter and turn on the ignition to the point that the car is turning over, I am assuming I should get a a small jet of fuel. I am currently getting what appears to be a gravity fed amount.

The fuel pressure doesn't change, even though I feel the fuel pump thumping, weather I have the car turned on or not.

I jumped, temporarily for trouble shooting, the inline fuse and cleaned the connections at the fuel pump.

What size fuse should installed. I will be heading to the parts store this afternoon.

[azygoustoyou]

Boy you guys know your stuff. I'm glad I have the opportunity to use your resourcefulness.

[rlux4]

The original fuse is 16 amp. I have a 15 amp in mine because I didn't find the AGC type in 16 amp.
Your fuel pump shouldn't thump, it should hum if it's running.
The sequence is: When the key is turned on, the dual relay gets power for the fuel pump through the brown with white wire. When the engine cranks and moves the AFM flap, the dual relay then contacts so that this 12V goes out the green with black stripe wire to the fuel pump. Moving the flap by hand with the key "on" should power up the fuel pump as a test, so you don't have to keep cranking the engine. To do this, take the air boot off the air flow meter, reach inside and move the flap. You should do this periodically to check for free movement of the flap anyway. If you have the fuel line open, it should be a pretty strong flow of fuel. I don't know the GPM, but before the pressure regulator the pressure is in the range of 35-40 pounds.
If you don't already have it, you will find Brad Artigue's wiring diagram a must:
http://www.artigue.com/fiat/pubs/Wiring_1980_1982.pdf
is for our years. It can be enlarged to a lot easier readable size at Kinkos. I have mine blown up to 11X17 and it's very easy to read.
Ron

Edited for clarification.

[kristoj]

If you do need to source a new fuel pump, there is a Bosch direct replacement available for just under $100. It is Bosch part number 69133. I sourced mine from my local Advance Auto store: http://shop.advanceautoparts.com/webapp ... 8816789___

[davidwhitt]

I have a similar issue. I was going to buy this, but I was able to find one elsewhere with some other parts.

http://cgi.ebay.com/ebaymotors/ws/eBayI ... &viewitem=

David

[RDSPYDR]

I picked up a new Bosch unit for $90.00. Be here tomorrow. Thanks

[rlux4]

Here's hoping that solves the problem.
Ron

[RDSPYDR]

Is there a filter( screen ) in the tank ? A friend of mine seems to thinks so. Since I am changing the pump, it would seem a good time to change one if there is. I change the inline filter a couple of months ago.

Thanks

[pope]

No screen in F.I tanks, only big ass fuel filters the size of coconuts after the pump.