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So i have a 2011 cts v coupe, i installed the dw300c fuel pumps and from then on the fuel pump fuse keeps blowing. Can anyone help me with this issue?
The car is running:
1- weapon-x track attack heat exchanger
2- SLP 160 thermostat
3- waterpump weapon-x
4- injectors ID 850
5- Airaid air intake
6- kooks headers + x-pipe
7- corsa performance sport
8- metco upper pully 2.4
9- metco lower 9.1 pully kit
10- gates hd belt
11- reinforced super charger brick
12-AEM methanol kit
13-dw 300c dual fuel pumps
 

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So i have a 2011 cts v coupe, i installed the dw300c fuel pumps and from then on the fuel pump fuse keeps blowing. Can anyone help me with this issue?
The car is running:
1- weapon-x track attack heat exchanger
2- SLP 160 thermostat
3- waterpump weapon-x
4- injectors ID 850
5- Airaid air intake
6- kooks headers + x-pipe
7- corsa performance sport
8- metco upper pully 2.4
9- metco lower 9.1 pully kit
10- gates hd belt
11- reinforced super charger brick
12-AEM methanol kit
13-dw 300c dual fuel pumps
In tank or aux?
 

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Just a thought, but I would check the current draw as obviously the dual pumps are exceeding the fuse rating.

I would put a relay to drive the pumps and use the fused line to turn on the relay.

However this means adding an additional B+ cable to the relay.
 
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2011 CTSV Coupe M BLK LSX376-B15
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So i have a 2011 cts v coupe, i installed the dw300c fuel pumps and from then on the fuel pump fuse keeps blowing. Can anyone help me with this issue?
The car is running:
1- weapon-x track attack heat exchanger
2- SLP 160 thermostat
3- waterpump weapon-x
4- injectors ID 850
5- Airaid air intake
6- kooks headers + x-pipe
7- corsa performance sport
8- metco upper pully 2.4
9- metco lower 9.1 pully kit
10- gates hd belt
11- reinforced super charger brick
12-AEM methanol kit
13-dw 300c dual fuel pumps
You most likely cut into one of the wires and have a short, the fuses are doing their job, assuming you cut the metal deck to gain access to the pumps for the new DW300c installation, not much clearance. Otherwise, re-inspect the fuel pump assembly for connector damage, something is grounding out to cause the short. The pumps properly installed will not cause blown fuses.
 

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2011 CTSV Coupe M BLK LSX376-B15
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You most likely cut into one of the wires and have a short, the fuses are doing their job, assuming you cut the metal deck to gain access to the pumps for the new DW300c installation, not much clearance. Otherwise, re-inspect the fuel pump assembly for connector damage, something is grounding out to cause the short. The pumps properly installed will not cause blown fuses.
What injectors did you go with?
 

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You most likely cut into one of the wires and have a short, the fuses are doing their job, assuming you cut the metal deck to gain access to the pumps for the new DW300c installation, not much clearance. Otherwise, re-inspect the fuel pump assembly for connector damage, something is grounding out to cause the short. The pumps properly installed will not cause blown fuses.

This.

Check terminals, pigtails and connectors for shorts. The pigtail at the top of the fuel hat is a great place to start!
 

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You most likely cut into one of the wires and have a short, the fuses are doing their job, assuming you cut the metal deck to gain access to the pumps for the new DW300c installation, not much clearance. Otherwise, re-inspect the fuel pump assembly for connector damage, something is grounding out to cause the short. The pumps properly installed will not cause blown fuses.
This is what happened with mine. Along with the 90* fitting cracking.
 

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2011 CTSV Coupe M BLK LSX376-B15
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A 10g (grey) power and 10g ground wire from the FPCM split into pairs to power the pumps, 30amp fuse. The DW300c pumps draw a bit more current than stock pumps, but should not cause fuses to blow. I set my fuel pressure to 40psi for normal and low flow conditions, the DW pumps are higher flow pumps and do not require as much pressure for flow, reduced power draw equals less stress on the system.

My hypothesis with regard to cracked fuel pump hat elbows: Under engineered. The designers did not take into consideration 'never imagined' to calculate for the large number of weight challenged, overly aggressive rear passengers that the sedans have become famous for. The shallow clearance between the sheetmetal deck and pump assembly flexes under heavy load (RH rear passenger) side. Try entertaining guests under 300lbs to avoid damage. Owners of coupes don't have to worry, it is near impossible to accommodate rear passengers! There are always exceptions.
 

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I like to keep the seats folded down. Reminds me of my first sports car, a 1976 Datsun 260Z. And the exhaust sounds a pissload better with the seats down than up. :)
Had a '77 280Z for years. Wish I still had it as it was a good looking car.
 

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I loved that car. But I put a set of racing springs and Bilstein shocks on it. You could stand on the front bump and jump up and down as hard as you could and the car would move about 1", rebound, and stop dead. Drove like it was on rails, but the unibody just couldn't take it and things literally started falling apart. I eventually got tired of having to work on it all the time and sold it off. But I see them pop up on sites like BAT, I always give 'em a careful look. Never know when there might be one worth buying. Always wanted to put a 327 in one.
 

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2011 CTSV Coupe M BLK LSX376-B15
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My wife and I conceived our first child in the front seat of a B-210, maybe too much information, life happens, I'm a veteran... I was an Army Honor Guard, was on the perimeter of Ft. Myer, VA. Just a couple months after, I purchased my first Cadillac, a 1958 Sedan Deville, a living room on wheels! The guy I bought it from couldn't get it to start, it was in the base auto shop, turned-out all it was, just a degraded fuel pump diaphragm. Now I appreciate fuel injection and electronic ignition, no generators to constantly replace, coils, condensers, points, etc...
 

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Thank you for your service kittyboy!
 

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2011 CTSV Coupe M BLK LSX376-B15
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Thank you, my service was some time ago... Prior to the Honor Guard I was in the 82nd Infantry, to this day, I don't camp! Anyway, with that ratio and cam what kind of hp you getting? What cam?
 

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Thank you, my service was some time ago... Prior to the Honor Guard I was in the 82nd Infantry, to this day, I don't camp! Anyway, with that ratio and cam what kind of hp you getting? What cam?
Funny, I didn't join Army or Marines because I really don't like camping.
 

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775whp on e50 using Matt's 2.5 cam.

Funny how the OP hasn't been a part of this thread since his original post. 😂
 
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