Burning insulation on fuel pump black wire

[Patrick.chi]

I recently swapped out my fuel pump to a 320lph quantum pump from the stock tt fuel pump because it was going out on me. When I did that the pump and car ran fine for a week. But after that week the car shut off on me and would supply the fuel pressure through the line to the motor. So I did some research and found that the FPCU could be bad so I did the bypass and got the car running again. Now my car is running but the insulation on the black wire that is on the 3 stage power clip is burning through the insulation causing smell of burning plastic in the cabin. I need help guys. I asked around and maybe the wire is arcing with another wire causing it to do this. Any suggestions??

[NolimitZ32]

Welcome to NICO, I've never had these kind of issues (knock on wood) so I'm not too well versed in it but I'll do my best to help. What 3-stage power clip are you referring to? Where is the actual wire burning? Have you traced it to see if it may be grounding out, also have you confirmed that your pump isn't pulling too much amperage?

[Patrick.chi]

It is the black ground wire I believe. I traced the wire down through the harness and it was a black ground wire. I am not sure that if it just arced with another wire causing it to burn or not. I replaced the wire with a 12 gauge wire just to be safe. The clip I am talking about is the one clip with the 0V 7V and 12V for the fuel pump. I did the bypass for my FPCU to get my car started. I tested this with my multi meter and it showed those voltages were still in working condition. My fuel however does work when I hooked to my car battery just for a test running on straight 12V. Below is the pump I installed. I did the bypass from the forum online as well for the 2 seater.

http://www.highflowfuel.com/i-10127807- ... -1996.html

[NolimitZ32]

I don't know man, at that price I would have to question the QC of those pumps, have you tried to get an amperage draw reading on the pump? Also for a ground wire to burn up something has to have gone pretty wrong.

[Patrick.chi]

Dang, I am still thinking it might have just arc over to another wire. I know the wire are old so might have been something I did when I was swapping out the pump. No I have not ran any amperage over the thing yet but I will test the resistance of the pump. I ordered a new fuel pump relay today so I am gonna go home and test the old one. Maybe that could solve the pump to turn on using the bypass of the FPCU.

[RubyRed300ZX]

I don't know man, at that price I would have to question the QC of those pumps, have you tried to get an amperage draw reading on the pump? Also for a ground wire to burn up something has to have gone pretty wrong.

Oh yea of little faith. You didn't see " HFP backs every single pump with a Lifetime Warranty. Walbro requires that you pay a $40 "warranty fee" when you send the pump in which often results in them telling you it was installer error, not pump failure"? We're talking LIFETIME warranty. How can you go wrong? Quantum Fuel Systems also known as High Flow Fuel, formerly in the same location Moineau Pump Corporation. Even states that their pumps are flow verified by RC Engineering ... prior company listing for their address is RemCo Engineering ... coincidence, I think not. And we're talking MEGA corporation here. Located at 4835 Colt Street, Suite E, in Ventura:

Description: 2,900 SF industrial building with fenced concrete outside yard. Reception, two offices, toilet. Across from UPS at the intersection of Colt Street and Palma Dr.

We're not talking one private office, we are talking two private offices ... and a toliet! Don't be a Debbie Downer.

[RubyRed300ZX]

Oh, and by the way, that's 70 square feet of office space. http://www.loopnet.com/Listing/18721545 ... entura-CA/

[NolimitZ32]

1. Its "Oh YE of little faith"
2. A lifetime warranty doesn't mean isht when it has to be used more often then not, form a business standpoint if it costs me $2.35 to make a fuel pump and I can sell it for $80.00 but my QC log shows 15% failure, I will offer a lifetime warranty and a blow pop with every pump because I am still making $66.00 on EVERY pump I sell (this is with 15% taken out for overall product run failure).
3. RC Engineering means ABSOLUTELY NOTHING to me, I have been in and around cars for now more than half of my life and I have seen all sorts of companies produce all sorts of things. I have watched ROTAs hop curbs at 50mph+ and drive away unscathed and I have seen OZs crack to hell going over a pothole (my own wheels). Most companies producing aftermarket parts for the automotive market do not have QC even close to that of the Nippon-Densos or the Hitachis of the world.

Now I realize that there was just a small hint of sarcasm in your post but I just wanted to go ahead and make these points because though I have absolutely no evidence of this my gut instinct tells me that the Walbro 255 in my tank and the Quantum "whatever the hell" in OP's tank were more than likely assembled by the same 5 year old Chinese hands in the same "factory" somewhere in Beijing's or Shanghai's industrial district.

[RubyRed300ZX]

NoLimit, somebody pee in your corn flakes the other morning? "a small hint of sarcasm"? No, it was all sarcasm. Lifetime Warranty = for the lifetime of whomever it is that sold it to you. Company with two employees that's been under several names in a six year time frame (maybe just a name change, or out of business and reincarnated under another corporate identity) and backed up by an engineering "firm" that seems to have been in the same building previously is sketchy at best.
And next time I make a post at 5 in the morning, I'll do a better job of proof reading for spelling errors.

[NolimitZ32]

I will not eat cat poo! And no pee corn flakes either!

My sincerest apologies, sacrasm doesn't translate well in type. I guess my post can just go to supplement yours to explain the reasoning behind your sarcasm. Truly I thought you were serious, I would hope to never take myself so seriously to get bent out of shape over a post on a forum. My bad man.

[gstewart]

Sounds like your new non-stock high performance pump is drawing more current than the stock wiring on the supply side can handle. Check out this blog posting at https://conceptzperformance.com/blog/?p=317. Good luck!