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| Blues. Neither car was happy right here. |
So the other night I went to startup the #bluecar and it just cranked, and cranked. I didn’t think I heard the fuel pump run/prime. I felt the fuel lines under the hood, and they felt like no pressure.
“Shit, E85 killed the Hellcat pump.” was my thought. Oh well. Maybe E85 is harsher than I thought. I did just get some gas/E85 maybe it was bad stuff. So I reserved myself to pulling the top of the tank off.
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| The two wire connector is for the pump. The ground is the white wire. It turns brown in the harness, and is shielded. Black with the yellow trace is the positive. |
I plugged my meter in to the two wire connector and saw 12 v at the pump. I checked all the fuses. I did try the pump with a small 19.2 battery, and it ran for a few seconds, but then seemed to stop. Maybe its just binding up with some time. Run and stop, run and stop. I had sort of already convinced myself I had to pull the top of the tank off, so doing some other logical things wasn’t in my wheelhouse.
I pulled the pump. Everything was clean in the tank. E85 smells good. Its a little harsh on your hands, but then again so is gasoline. Either way. Once I got the pump out, I used my jump box, and the pump ran great. No issues. Everything inside super clean, no corrosion, no weirdness, Actually everything was probably cleaner than when I took it out last time. Slammed it back in, figured, must be FPCM. Let me bypass it, by grounding the FPCM wire, and see how it goes.
The two wire connector is for the pump. The ground is the white wire. It turns brown in the harness, and is shielded. Black with the yellow trace is the positive.
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| Brown wire in this harness has the white wire in it. It is shielded. You can see the shield wires on the outside there. I did trim these later. |
By grounding the white wire, you are grounding the fuel pump, creating a complete circuit. The FPCM, or fuel pump control module is what I call a complicated ground.
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| FPCM or fuel pump control module for an R32 GT-R |
The fuel pump control module puts resistance on the ground side of the fuel pump circuit to slow the fuel pump down at low speed, or low demand times. Its for NVH or noise, vibration, and harshness. You don’t probably want or need it in 2020. Car started up, ran, and I took it to two events on Sunday. No more noise than it had before. Since its an in tank pump, and my car has an exhaust, and a stereo, for sure nothing I will ever notice.
They do fail, and they can leave you stranded. You can be pre-emptive and go and do it now, you can do something like a fuel pump relay kit, or you can leave it as stock, but keep a jumper wire in the car, for that time that it does fail.
Buy USA Legal R32, R33, and R34 Skylines at Importavehicle.com!
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NGK Iridium IX Spark Plug LFR5AIX-11 (8 Pack) for NISSAN TITAN SE 2004-2008 5.6L/5552cc
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OYEAUTO 93501 Iridium Spark Plugs LKAR7BIX11S 6 Pack Compatible with Nissan 370Z Maxima Murano Pathfinder Quest GT-R Altima 2001-2024 & Infiniti G37 QX60 Q60 2008-2024 & Acura MDX TLX 2017-2024 V6
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SYKRSS 6240 Iridium Spark Plugs 8 Pack Compatible with Nissan Armada Titan Pathfinder Armada 2004-2006 Compatible with INFINITI QX56 M45 FX45 Q45 2002-2010 4.5L 5.6L V8 Engine for PLFR5A-11 Spark Plug
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Iridium Spark Plugs 8 Pack 93501 LKAR7BIX-11S Compatible with Nissan Armada NV2500 NV3500 TITAN INFINITI FX50 M56 Q70 Q70L QX56 QX70 QX80 V8 5.0L / 5.6L
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BDFHYK 93501 Iridium Spark Plugs Compatible with Nissan TITAN Altima Armada NV2500 NV3500, Compatible with INFINITI QX56 QX60 QX80 M56,CX-3 Replacement for LKAR7BIX11S Set of 8
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NGK V-Power Spark Plug – 2526
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