Fuel pump doesn't run

[topsnake]

Hey Vips,

how can it be that my FP doesn't turn when I turn the key? I'm sure, it is not broken. Battery was off for about half a year and a new engine's in there. Could this be something?
Hope for help

bb D

 

[Tom F&L GoR]

The fuel pump will only run for about 1 second upon key on. In other words, you can crank and crank and it will run one second, then stop, then intermittently run again.

To see if it is doing what it is supposed to, check for pressure on the intake manifold schrader valve (the big size tire valve.) Use a rag or watch your eyes.

 

[topsnake]

thanks for your hint, but on key on, it doesn't start the fuel pump. I used to hear it for a second and then stop.
But it even doesn't turn anymore...

Can this be something with the alarm system?

Greets
Dennis

 

[dave6666]

Fuse good?

 

[HUCKGTS]

What year is your Viper? I know there was a recall on I think 2003 vipers for fuel pump wiring

 

[dave6666]

What year is your Viper? I know there was a recall on I think 2003 vipers for fuel pump wiring

This is a Gen 2 forum. We can suppose it is not a 2003.

 

[HUCKGTS]

Your right I was not paying attention. Doing to many thing at one time. Sorry

 

[topsnake]

it's a 2000 GTS. Fuse is good!
I installed a 99 engine in there, but I did not touch the FP once...

Greets
Dennis

 

[dave6666]

Is the battery still any good? Do the interior lights work? Radio? Headlights?

 

[Steve-Indy]

Remove then reseat fuel pump relay...found in ther back by the amp.

 

[Tom F&L GoR]

If you get to the relay, you are at the wires to be able to try this:

In a GTS, connect K31 20 BR/VT (brown/violet stripe) to ground
In an RT, connect K31 20 BR (brown) to ground

This takes the place of the PCM function, which completes the ground to allow the fuel pump to run. Now every time your key is in run position, the fuel pump should run. Don't leave it this way.

If the pump runs, the the PCM is not switching closed. It could be the alarm system, since you said the battery has been out?
If the pump does not run, then you have an interruption of power to the pump.

Grusse von Bremerhaven.

 

[plumcrazy]

i dont think i ever heard my OEM FP turn on.....

did you check the pressure at the schrader valve ???