Subject	I forget exactly how I worked around this but I think I
Posted by	The Devils Z on December 09, 2012 at 6:30 PM
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In Reply To	ash spec dual fuel pump controller issues/danger posted by DarkZide on December 09, 2012 at 02:41 PM
Message	ran a seperate power wire to a 12v source and I ran the ground to the factory harness / plug . The Ash Spec FPC and OEM FPC controls voltage by manipulating the ground wire. Specialty Z is correct - The OEM wiring cannot support full voltage on 2 pumps. My first install I melted the power wire to the second pump as well ( external to the bulkhead ). The FPC was fine. I can't remember exactly how I have mine wired up but I can check my Z if needed. The walbro pumps actually pull one of the lower amounts of volts as compared to other fuel pump setups on the market. Another "side effect" that most don't speak about as it pertains to 2 fuel pumps are the power they pull in general. I have found that if you have a weak battery and run 2 fuel pumps, you will have idle issues when you run the A/C / bigass stereo / turn signal / while stopped because the alternator can't keep up and the ecu doesn't get the minimum juice needed. Because the ECU is not receiving enough charge, the FPC doesn't get what it needs to drive 2 fuel pumps which results in low fuel pressure at idle which makes the car idle rough. I proved by toggling / cycling my pumps off and on 1 at a time ( I have switches to kill / check each pump ). When I did this the issue went away / fuel pressure increase (dropped with 2 pumps on) and when I replaced the battery I never had another rough idle issue at idle with all the accessories on. =============Sig begins here================ The Devils Z.com 690 rwhp dyno View Me! Disclaimer : Not Safe For Work ! Kid :" Those old guys drive that way ?" Witness : "Yeah, I rode behind them at ZNationals 2010 on these back roads leaving the track day and they were foot in. They ran into the curves w/no brakes and didn't lift!" - Hampton Inn parking lot at ZNationals 2011 -
Follow Ups	ash spec dual fuel pump controller issues/danger - DarkZide 14:41:31 12/09/12 What was Ash's feedback on the failure? (n/m) - samsung-Z [Houston] 14:50:13 12/09/12 well Ray the cars owner emailed him or Z1 - DarkZide 15:39:01 12/09/12 that could have potentially caused an explosion (n/m) - WhiTTe Z 16:11:18 12/09/12 that could have potentially caused an explosion (n/m) - WhiTTe Z 15:47:37 12/10/12 that could have potentially caused an explosion (n/m) - WhiTTe Z 16:56:46 12/11/12 If the wiring was the issue, curious why you didn't - Jayru 15:03:49 12/09/12 after discussing this with the guys at Spec Z we decided - DarkZide 15:42:00 12/09/12 I'm confused - Jayru 17:15:58 12/09/12 sorry for the confusion here is what I did - DarkZide 17:26:26 12/09/12 whoa (n/m) - LJZTT 15:05:52 12/09/12 You need to rewire with #10 wire, the existing wire can't - njz 15:44:57 12/09/12 it looks like the pigtails that came with the pumps - aliaZ 17:28:21 12/09/12 Who soldered the two hot wires to the stock connection? - RZturbo 17:41:53 12/09/12 details please? - aliaZ 17:55:25 12/09/12 Yeah thats how it was before, I change that set up as well - DarkZide 18:51:01 12/09/12 I forget exactly how I worked around this but I think I - The Devils Z 18:30:34 12/09/12 Yeah the way I have it only one pump runs at idle - DarkZide 19:08:58 12/09/12 Re: Yeah the way I have it only one pump runs at idle - WazTTed 05:17:22 12/10/12 Re: I forget exactly how I worked around this but I think I - ouikikazz 14:00:09 12/10/12 there is an unused pin on the ashspec controller - aliaZ 07:04:00 12/12/12 so why does ash not put this in his install instructions? (n/m) - DarkZide 11:37:06 12/12/12 good question - aliaZ 17:49:23 12/13/12 I think I just upgraded the ground wire and had no issues. (n/m) - toykoz32 12:19:22 12/11/12 Interested in doing a write up for us? (n/m) - KongZTT GT28RS MD 21:25:07 12/09/12 possibly, I would rather do a write up when I install the - DarkZide 21:56:00 12/09/12 sounds good man - KongZTT GT28RS MD 22:10:27 12/09/12
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