fuel pump problems!!!!
Thread Starter
Racer
Joined: Oct 2011
Posts: 342
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From: Seymour Indiana
fuel pump problems!!!!
I will make this as short as possible. Current problem is pump is not getting power. Now here is the story. Original setup was a aero 340 with a bap. With that was running out of fuel up top. Then I randomly blew the fuse for the bap and melted the fuse harness in the process. Repaired that and a added a second aero 340 both running full time. Then melted the wiring harness an bulkhead at the fuel pump . Repaired that and completely changed the the fuel system to 2 walbro 255's, with one pump activated by a hobs and the other on factory fuel wiring. Also had a bad ground in the pump area and fixed that. Car was running great an driving. Parked for 2 weeks and went to start yesterday and pumps are not getting power!!!! Im ready to set the car in fire!!!
Thread Starter
Racer
Joined: Oct 2011
Posts: 342
Likes: 0
From: Seymour Indiana
I forgot to add that it does have a racetronix harness, I threw the bap in the trash when I switched to the walbro pumps. Car is an 01 6spd targa coupe with a destroked 427 (387ci) and a procharger d1sc
Last edited by Boosted_C5; Jun 5, 2013 at 10:51 AM.
Safety Car
Joined: Aug 2000
Posts: 4,537
Likes: 84
From: St. Joseph MO
Cruise-In III Veteran
Cruise-In IV Veteran
Do you have power from the eyelet connector to the relay on the racetronix harness? If you use a jumper to activate the fuel pump relay (signal to racetronix harness) do you have 12+ VDC to the pump connection? How is the second pump being supplied power?
Team Owner
Joined: May 2006
Posts: 21,473
Likes: 356
From: Palmdale, Ca----- 2009 Cyber Gray 4LT A6 F55 452 RWHP 422 RWTQ- RIP 1998 C5 734 RWHP & 585 RWTQ-----
Did you check the In-Line fuse on the Racetronix wire harness?
Check the fuel pump relay as well.
Thanks,Matt
Check the fuel pump relay as well.
Thanks,Matt
Thread Starter
Racer
Joined: Oct 2011
Posts: 342
Likes: 0
From: Seymour Indiana
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Thread Starter
Racer
Joined: Oct 2011
Posts: 342
Likes: 0
From: Seymour Indiana
K did the jumper test and nothing!! If anybody wants to give me a call and help me out 812-498-5956 larry.
I have a volt meter just not sure where I should be checking. I unplugged the connector on the pump hat and test each pin. One was a lil over 10v and the other was 33.5v and the other 2 were 0v so those were grounds im assuming
I have a volt meter just not sure where I should be checking. I unplugged the connector on the pump hat and test each pin. One was a lil over 10v and the other was 33.5v and the other 2 were 0v so those were grounds im assuming
Team Owner
Joined: May 2006
Posts: 21,473
Likes: 356
From: Palmdale, Ca----- 2009 Cyber Gray 4LT A6 F55 452 RWHP 422 RWTQ- RIP 1998 C5 734 RWHP & 585 RWTQ-----
This is your best bet, contact Bill Curlee, usually he hangs out in the TECH Section.
He can walk you through the electrical and send some schematics to you as well.
I won't be able to help tonioght or tomorrow and am leaving for Big Bear Saturday.
Bill will get back with you asap and will also be able to talk on the phone.
Thanks,Matt
He can walk you through the electrical and send some schematics to you as well.
I won't be able to help tonioght or tomorrow and am leaving for Big Bear Saturday.
Bill will get back with you asap and will also be able to talk on the phone.
Thanks,Matt
Thread Starter
Racer
Joined: Oct 2011
Posts: 342
Likes: 0
From: Seymour Indiana
As of now the problem was another bad ground and I believe both pumps are shot. Im gonna try the jumper trick again now that the ground is fixed but pretty sure I will be buying 2 more pumps
Team Owner
Joined: May 2006
Posts: 21,473
Likes: 356
From: Palmdale, Ca----- 2009 Cyber Gray 4LT A6 F55 452 RWHP 422 RWTQ- RIP 1998 C5 734 RWHP & 585 RWTQ-----
You might need to trace, from the fuel pump forward, the wire harness all the way to the fuse box if necessary! That is if any problems still exist after this try.
Hopefully the pumps are not fried and it was just the ground!
Keep us posted on the results and if you can take some pics of the damage and findings, they help us too when we need to help
Thanks,matt
Thread Starter
Racer
Joined: Oct 2011
Posts: 342
Likes: 0
From: Seymour Indiana
Car is fixed, ground for pumps came off inside the tank due to loose connector. Im going to do some modifying to the pump hat for better piece of mind. Im also installing my -8 lines and rails. Car will be finished soon