My 4.9 wiring thread (Page 5/16)
jscott1 APR 14, 02:53 PM

quote
Originally posted by josef644:
I would think the FP access hole has to be the same.



The fuel pump itself is bolted to the sender. So the physical size of the fuel pump is nearly irrelevant.

Everything else being equal I would suggest the more powerful pump. With a fuel injected engine it's relatively harmless to have too much flow, but not enough can make your engine run dangerously lean.
sanderson APR 14, 03:39 PM

quote
Originally posted by josef644:

I went to RockAuto and looked up the fuel pump for a 1993 Deville, and a 1988 Fiero GT. Both used the AC Delco EP378 fuel pump, $78.79. 1987 Fiero Gt used a different one, EP240,$80.79. Two bucks difference. I was thinking that the 87 and 88 Fiero' both had the same enlarged just a bit fuel tank. I would think the FP access hole has to be the same.



The Caddy pump I is used from a '92 Deville and the motor is about twice the diameter of an '88 Fiero V-6 fuel pump ( and I personally think size matters on electric motors). I had to grind on the fuel sending unit and enlarge the hole in the tank by about 1/16" on 1/2" of the circumference to get it in the tank. This project also entailed modfications to the fuel sending unit to mount the pump but I don't remember exactly what they were. It's a tight fit but it can be down.

In your case I'd just pull the pump from the '93 Deville (whatever it is) and use it. If it's the same as a Fiero pump it's a piece of cake and you save $80. As I remember removing the gas tank on the Caddy was no big deal.
josef644 APR 14, 05:44 PM
My 4.9 is a 93, the Deville was a 91. And it is history. I'll just get me an 88 V6 fuel pump.

[This message has been edited by josef644 (edited 04-14-2009).]

jscott1 APR 14, 07:04 PM

quote
Originally posted by sanderson:


The Caddy pump I is used from a '92 Deville and the motor is about twice the diameter of an '88 Fiero V-6 fuel pump ( and I personally think size matters on electric motors). I had to grind on the fuel sending unit and enlarge the hole in the tank by about 1/16" on 1/2" of the circumference to get it in the tank. This project also entailed modfications to the fuel sending unit to mount the pump but I don't remember exactly what they were. It's a tight fit but it can be down.



Ohh I can't think of a reason that I would want to cut a larger hole in a gas tank. There are plenty of pumps that are only minimally larger, I would have gone with the Corvette or the Walbro before I started grinding on a gas tank.
sanderson APR 14, 11:59 PM

quote
Originally posted by jscott1:


Ohh I can't think of a reason that I would want to cut a larger hole in a gas tank. There are plenty of pumps that are only minimally larger, I would have gone with the Corvette or the Walbro before I started grinding on a gas tank.




I had about 80 reasons to use the Caddy pump. The tank had been thoroughly cleaned with lacquer thinner and then hot water and TSP. There was no explosion risk.

josef644 APR 25, 09:22 PM
M Moose, Fieroseverywhere,
I am starting to work on my harness for my 4.9 swap. I will be going to go get my 87 Coupe to put this in the next 8-9 days. I removed the body connector (two 7MM screws) from the wiring today, and started removing the black plastic harness protector stuff.

I was looking at another guys thread requesting help about Pin 'C' on the round transmission plug. He was removing the two part rectangular connector with one small bolt in the center, and joining the ends back together. Are all you guys removing this?

Is there room in the ECM area for this,or have you guys been mounting it in the engine compartment? If it needs to go, I am gonna start in on this and have it done when my care gets here.
Thanks
Joe Crawford

[This message has been edited by josef644 (edited 04-26-2009).]

Mickey_Moose APR 26, 10:14 AM

quote
Originally posted by josef644:

M Moose, Fieroseverywhere,
I am starting to work on my harness for my 4.9 swap. I will be going to go get my 87 Coupe to put this in the next 8-9 days. I removed the body connector (two 7MM screws) from the wiring today, and started removing the black plastic harness protector stuff.

I was looking at another guys thread requesting help about Pin 'C' on the round transmission plug. He was removing the two part rectangular connector with one small bolt in the center, and joining the ends back togeather. Are all you guys removing this?

Is there room in the ECM area for this,or have you guys been mounting it in the engine compartment? If it need to go, I am gonna start in on this and have it done when my care gets here.
Thanks
Joe Crawford



Just remember to take your time - if you rush, you may make a mistake (and those can be tough to find later).

Transmission plug - I have only done manual cars, so I can not comment on transmission plugs - maybe point me to the thread and I can have a look. The only 2 part connector I an aware of right now is the C500 - is that what you are refering to?

My ECM is mounted in the stock location, you have to modify the plastic bracket a bit for it to fit (make a notch in the side for the top most plug) - I will see if I have a picture of mine I can post.

Cheers,
josef644 APR 26, 05:39 PM
Here is a picture of it, I didn't know the number of it,or on any of my two printouts from Fiero Addiction, or this thread. They call it "Engine to Dash Connector Mating Side".


I took the picture from the other guys thread.
http://www.fiero.nl/forum/Forum2/HTML/100076.html
Joe

[This message has been edited by josef644 (edited 04-26-2009).]

Fieroseverywhere APR 26, 11:30 PM

quote
Originally posted by josef644:

Here is a picture of it, I didn't know the number of it,or on any of my two printouts from Fiero Addiction, or this thread. They call it "Engine to Dash Connector Mating Side".


I took the picture from the other guys thread.
http://www.fiero.nl/forum/Forum2/HTML/100076.html
Joe




That is the caddy C225 connector. I used it as a quick connect for the engine harness. I still used the fiero passthrough for the firewall. When pulling my engine out I just disconnect the C225 and don't have to touch anything in the interior. I have a pinout for it though I believe there is also one on the fieroaddiction site. The pinout will only help so much if you decide to use it. You will still have to connect some wires where there are empty spaces (use the pins from the unused wires). It was more work during the install but should save time during maintence and repair. You can also use this instead of the fiero passthrough if you are willing to trim the firewall for clearance.

Option 2: Cut the wires on the engine side of this connector, feed them through the firewall, connect to PCM connectors and C203. Cleaner looking install if that is what you are going for.

[This message has been edited by Fieroseverywhere (edited 04-26-2009).]

Fieroseverywhere APR 26, 11:35 PM

quote
Originally posted by Mickey_Moose:

My ECM is mounted in the stock location, you have to modify the plastic bracket a bit for it to fit (make a notch in the side for the top most plug) - I will see if I have a picture of mine I can post.

Cheers,



Option 2 : Use the ECM mount bracket from an 87-88 Duke. Will fit with no modifications except for screw holes to mount it.