EFI Problem Advice

Caribbean Rider · 10-08-2016, 06:07 PM

One of our RX3 demos has a problem.

It cranks just fine, but won't start.

The fuel pump does not pressurize during the ignition sequence. No sound. But the rest of the ignition sequence is normal.

We've checked:

Battery voltage
All connectors and fuses
Fuel pump relay

We also noticed that the fuel gauge registers empty, and the fuel light flashed....and the tank is totally full.

Before we start pulling the tank off to check the pump, are we missing something?

TIA for the input!

Adjuster · 10-08-2016, 07:54 PM

Use a 12v jumper wire to direct wire to battery the fuel pump to see if it runs.

/

RedHawk47 · 10-09-2016, 03:08 AM

Kill switch on handlebars?
If the fuel pressure was pumped up the first try, and you didn't notice, it might not pump on subsequent tries.
Did you check the fuses with a meter?
The connectors under the tank may be loose - fuel pump and fuel gauge.

Caribbean Rider · 10-09-2016, 08:33 AM

It's the fuel pump. No go. It *tries* to start but is frozen inside.

I don't have an order of parts coming for several weeks, but need a pump.

CAC has one for US$235 which seems excessive. I'd look around the web but cannot, for the life of me, find the Delphi part number. It's a T-11 series pump.

The stamping on it are as follows:

First line: 28128525 0755
Second line: 6954 A Delphi IN

Anyone know a part number? Sourse for the part?

Caribbean Rider · 10-09-2016, 09:53 AM

Zongshen tells me the pump is Delphi, part number is 28257571 which, as far as I can find, is the entire module, and then I can only find it on Russian websites.

Anyone know where I may be able to find this pump?

RedHawk47 · 10-09-2016, 08:09 PM

Sounds like a warranty issue. Who did you buy the bike from? Where are you? If you bought it from CSC I sure they will send you a new pump. If you are an importer on some Caribbean island perhaps CSC with work with you as an intermediary with Zongshen.

willy dog · 10-10-2016, 08:11 AM

a light tap to the fuel pump might work for a temp. fix

katflap · 10-10-2016, 08:52 AM

Quote:

Originally Posted by Caribbean Rider

Zongshen tells me the pump is Delphi, part number is 28257571 which, as far as I can find, is the entire module, and then I can only find it on Russian websites.

Anyone know where I may be able to find this pump?

Taobao is where I would get it from via an agent like taobaotrends but can take some time to arrive

https://world.taobao.com/item/521871...5571.17.pDpDp1

BlackBike · 10-11-2016, 03:11 AM

Quote:

Originally Posted by katflap

Taobao is where I would get it from via an agent like taobaotrends but can take some time to arrive

https://world.taobao.com/item/521871...5571.17.pDpDp1

Whoop! there it is

humanbeing · 10-11-2016, 03:46 AM

Compatibles (副厂) & Genuine (原厂) https://item.taobao.com/item.htm?id=539004686463
---
[At ur own risk]Sometimes reverse polarity can unclogged those pump...

Caribbean Rider · 01-25-2017, 04:18 PM

I had the same problem. No matter what I did, the pump motor was frozen.

Delphi was uncooperative on a pump, and I also thought CSC was spendy.

I have a relationship with Zongshen and got the pump from there, but shipping put the net price around US$75, still far less than CSC..

I saw that Taobao unit. The shipping to the US is around US$12. So close to US$60 or so.

I got the unit in about 18 days.

It's absurd that you have to buy the entire unit when just the pump failed.

BTW: reverse polarity did nothing. It wanted to run but doesn't.

Caribbean Rider · 01-25-2017, 04:25 PM

Look what I found!

RX3 fuel pump without module on Taobao

10-08-2016, 06:07 PM	#1
Caribbean Rider Join Date: Jun 2015 Posts: 19	EFI Problem Advice One of our RX3 demos has a problem. It cranks just fine, but won't start. The fuel pump does not pressurize during the ignition sequence. No sound. But the rest of the ignition sequence is normal. We've checked: Battery voltage All connectors and fuses Fuel pump relay We also noticed that the fuel gauge registers empty, and the fuel light flashed....and the tank is totally full. Before we start pulling the tank off to check the pump, are we missing something? TIA for the input!
	0

10-09-2016, 03:08 AM	#3
RedHawk47 Join Date: Oct 2015 Location: Berthoud, CO Posts: 205	Kill switch on handlebars? If the fuel pressure was pumped up the first try, and you didn't notice, it might not pump on subsequent tries. Did you check the fuses with a meter? The connectors under the tank may be loose - fuel pump and fuel gauge. __________________ Dan CSC RX3 Cyclone, CSC TT250, Moto Guzzi V7 II, KLR650
	0

10-09-2016, 08:09 PM	#6
RedHawk47 Join Date: Oct 2015 Location: Berthoud, CO Posts: 205	Sounds like a warranty issue. Who did you buy the bike from? Where are you? If you bought it from CSC I sure they will send you a new pump. If you are an importer on some Caribbean island perhaps CSC with work with you as an intermediary with Zongshen. __________________ Dan CSC RX3 Cyclone, CSC TT250, Moto Guzzi V7 II, KLR650
	0

10-10-2016, 08:11 AM	#7
willy dog Join Date: Oct 2015 Location: vermont Posts: 238	a light tap to the fuel pump might work for a temp. fix __________________ Peace and Zong Life
	0

10-11-2016, 03:46 AM	#10
humanbeing Join Date: Mar 2008 Posts: 2,436	Compatibles (副厂) & Genuine (原厂) https://item.taobao.com/item.htm?id=539004686463 --- [At ur own risk]Sometimes reverse polarity can unclogged those pump... __________________
	1

10-08-2016, 07:54 PM	#2
Adjuster Join Date: Dec 2014 Location: Deerfield Beach FL Posts: 1,410	Use a 12v jumper wire to direct wire to battery the fuel pump to see if it runs. /
	0

10-09-2016, 08:33 AM	#4
Caribbean Rider Join Date: Jun 2015 Posts: 19	It's the fuel pump. No go. It tries to start but is frozen inside. I don't have an order of parts coming for several weeks, but need a pump. CAC has one for US$235 which seems excessive. I'd look around the web but cannot, for the life of me, find the Delphi part number. It's a T-11 series pump. The stamping on it are as follows: First line: 28128525 0755 Second line: 6954 A Delphi IN Anyone know a part number? Sourse for the part?
	0

10-09-2016, 09:53 AM	#5
Caribbean Rider Join Date: Jun 2015 Posts: 19	Zongshen tells me the pump is Delphi, part number is 28257571 which, as far as I can find, is the entire module, and then I can only find it on Russian websites. Anyone know where I may be able to find this pump?
	0

01-25-2017, 04:18 PM	#11
Caribbean Rider Join Date: Jun 2015 Posts: 19	I had the same problem. No matter what I did, the pump motor was frozen. Delphi was uncooperative on a pump, and I also thought CSC was spendy. I have a relationship with Zongshen and got the pump from there, but shipping put the net price around US$75, still far less than CSC.. I saw that Taobao unit. The shipping to the US is around US$12. So close to US$60 or so. I got the unit in about 18 days. It's absurd that you have to buy the entire unit when just the pump failed. BTW: reverse polarity did nothing. It wanted to run but doesn't.
	0

01-25-2017, 04:25 PM	#12
Caribbean Rider Join Date: Jun 2015 Posts: 19	Look what I found! RX3 fuel pump without module on Taobao
	2