Engine Swap Everything about swapping an engine into your Third Gen.....be it V6, V8, LTX/LSX, crate engine, etc. Pictures, questions, answers, and work logs.

No fuel after swap

Thread Tools
 
Search this Thread
 
Old 04-14-2011, 07:52 AM
  #1  
Junior Member
Thread Starter
iTrader: (1)
 
rffy's Avatar
 
Join Date: Jan 2011
Location: Akron, Oh
Posts: 41
Likes: 0
Received 0 Likes on 0 Posts
Car: 1982 Z28
Engine: 383
Transmission: TCI TH350
Axle/Gears: 3.23 Posi
No fuel after swap

I just got done swapping a 383 into my 82z. I removed the passenger side engine harness when I did the swap (it was a crossfire car and the harness was a mess). The car was converted to carb before I bought it but the fuel pump was still energized by the old ECM. The in tank fuel pump (it's a delphi FE0115) was replaced when the PO swapped to carb.
Since I no longer have the ECM the pump doesn't work. The fuel pump relay doesn't have anything plugged into it anymore as that harness is gone. Where does the harness for the pump enter the car and what wire would I need to splice into to get power to the fuel pump?
Do I need to buy a generic FP relay?
I got the engine to run by manually filling the carb fuel bowls so the rest of the wiring is good.
Appreciate any help. Thanks!
Old 04-14-2011, 08:34 AM
  #2  
Supreme Member
 
built91Z28's Avatar
 
Join Date: Feb 2010
Location: Orlando
Posts: 1,446
Likes: 0
Received 2 Likes on 2 Posts
Car: 1991 Camaro Z28
Engine: 357, Canfield heads, solid roller,
Transmission: Upgraded 03 Cobra T56
Axle/Gears: 9" 3.50 gears and Detroit Locker
Re: No fuel after swap

If you put the back seats down and pull the carpet up, you'll see the wires running outside the car. These are the wires for the fuel pump, and the fuel level sending unit. I forget which wire is for the pump, but its one of them. You can the get a relay and a universal fuse holder and tie into this wire if you want.
Old 04-14-2011, 09:30 AM
  #3  
Junior Member
Thread Starter
iTrader: (1)
 
rffy's Avatar
 
Join Date: Jan 2011
Location: Akron, Oh
Posts: 41
Likes: 0
Received 0 Likes on 0 Posts
Car: 1982 Z28
Engine: 383
Transmission: TCI TH350
Axle/Gears: 3.23 Posi
Re: No fuel after swap

I pulled up the carpet with the back seats down and didn't see the wire bundle yet. I am gonna drive up to summit and grab their universal fuel pump relay kit. It would be nice if I could find the +12v wire to the FP somewhere close to the engine bay (like within 5 feet or so) so I don't have to run a wire from front to back of the car.
Old 04-14-2011, 11:38 AM
  #4  
Supreme Member

 
camaronewbie's Avatar
 
Join Date: Sep 2002
Location: Cary, North Carolina
Posts: 9,192
Likes: 0
Received 16 Likes on 16 Posts
Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Re: No fuel after swap

Should have been an oil pressure sensing unit just above the oil filter on the original motor, would have had 2 wires to it, orange and red - that was an alternative fuel pump circuit. You can see it here in the wiring diag: http://www.austinthirdgen.org/mkport...ine_wiring.gif

See if you can locate those wires - they should have come out of the driver side harness - they would have split out of the loom that ran behind the engine (over the tranny top) just on driver side of the tranny, and they went to that oil pressure unit just above the oil filter. That is a always hot conection directly from the battery - you could run a relay with those wires, and a hot-in-run to activate the relay, so the pump only comes on when relay is activated with key on.
Old 04-14-2011, 03:33 PM
  #5  
Junior Member
Thread Starter
iTrader: (1)
 
rffy's Avatar
 
Join Date: Jan 2011
Location: Akron, Oh
Posts: 41
Likes: 0
Received 0 Likes on 0 Posts
Car: 1982 Z28
Engine: 383
Transmission: TCI TH350
Axle/Gears: 3.23 Posi
Re: No fuel after swap

Thanks for the help Camaronewbie! I appreciate it. I am still wiring everything up and hope to have it working this evening. I got the fuel pump relay kit from Summit. I went ahead and drilled a hole in the grommet at the back of the car and ran another feed for the pump through that. I spliced into the FP at the back by the driver's exhaust tip.
Old 04-14-2011, 04:10 PM
  #6  
Supreme Member
iTrader: (11)
 
New2Chevy's Avatar
 
Join Date: Oct 2007
Location: Wyoming
Posts: 1,371
Likes: 0
Received 4 Likes on 2 Posts
Car: 1995 Formula
Engine: LT1 350
Transmission: Built 4L60e
Axle/Gears: 10 bolt, Eaton posi, 3.73's
Re: No fuel after swap

Nice that you live near Summit Let us know when it's running.
Old 04-14-2011, 05:59 PM
  #7  
Junior Member
Thread Starter
iTrader: (1)
 
rffy's Avatar
 
Join Date: Jan 2011
Location: Akron, Oh
Posts: 41
Likes: 0
Received 0 Likes on 0 Posts
Car: 1982 Z28
Engine: 383
Transmission: TCI TH350
Axle/Gears: 3.23 Posi
Re: No fuel after swap

It worked perfect! thanks again. I got to hear the 383 run for the first time so it was nice. It ran for about 30-40 seconds.
The relay I installed is by the brake booster.

I am hoping to get somewhere around 450hp

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Frozer!!!
Camaros for Sale
35
01-19-2024 04:55 PM
midge54
LTX and LSX
21
12-27-2019 04:14 PM
theshackle
Tech / General Engine
4
03-05-2017 06:37 PM
gta90
TPI
40
09-15-2015 04:00 PM
NBrehm
Engine/Drivetrain/Suspension Parts for Sale
1
08-25-2015 11:49 PM



Quick Reply: No fuel after swap



All times are GMT -5. The time now is 09:59 AM.