[mwildman007]

Hey guys i have a 1993 safari xt vin w and it wont start has good spark at all plugs i think it might be fuel pump as no fuel at rail however how do i bypass the relay and run straight from battery(to the pump) i read there is a bypass wire near the relay however is this true and what colour wire would it be? thanks in advance for any help
cheers matt

 

[ihatemybike]

Do you hear the pump try to run when you turn the key to the on position? When was the last time the fuel filter was replaced?

Grumpy has a wire near the battery to bypass the relay. I've only ever used it to empty the tank using with a weakened pump.

 

[Gary]

Fuel pressure check is primary test for the fuel pump.Replace with Delco pump only and replace the fuel filter with a Delco brand also.

 

[Gary]

Fuel pressure check is primary test for the fuel pump.Replace with Delco pump only and replace the fuel filter with a Delco brand also.

 

[moneymaker]

Another thing, I ran into on my 93. When I turned the key on, you can hear the fuel pump running. with my guage at the throttle body(I have a TBI) there was no pressure at all, no fuel. Took the filter off, key on no fuel coming out. Dropped the tank to realize the rubber hose from pump to sending unit dry rotted out and had a hole in it. So the pump was just pumping fuel back inside the tank. I dont know if you hear the pump running when the key is on though. Please let us know.

 

[mwildman007]

the pump has come on 2 times for a short burst of 2 seconds once or twice in maybe 40 attempts at starting that my helper has heard but apart from those two times nothing however i had the relay off and it is getting volts on igniition on for a few seconds every time.

 

[mwildman007]

Do you hear the pump try to run when you turn the key to the on position? When was the last time the fuel filter was replaced?

Grumpy has a wire near the battery to bypass the relay. I've only ever used it to empty the tank using with a weakened pump.

fuel filter could have been a long time ago only had van for 3 months, i dont hear the pump except for the two times i mentioned nothing since then

 

[ihatemybike]

Start with the fuel filter. They should be swapped out every 20k miles anyway.

 

[astro355]

the pump has come on 2 times for a short burst of 2 seconds once or twice in maybe 40 attempts at starting that my helper has heard but apart from those two times nothing however i had the relay off and it is getting volts on igniition on for a few seconds every time.

That is normal. The fuel pump is supposed to run for a few seconds and then cutout if the engine isn't started. I would test the voltage at the connector down by the fuel tank so you can rule out everything else except the pump.

 

[$uperJoe]

the pump has come on 2 times for a short burst of 2 seconds once or twice in maybe 40 attempts at starting that my helper has heard but apart from those two times nothing however i had the relay off and it is getting volts on igniition on for a few seconds every time.

That is normal. The fuel pump is supposed to run for a few seconds and then cutout if the engine isn't started. I would test the voltage at the connector down by the fuel tank so you can rule out everything else except the pump.

X2 the connection for the pump should be under the drivers door at the outside of the underneath. it will be 3 wires. purple black and gray. purple is the sending wire for the gauge. the other 2 are for the pump. unplug this connection and test across the black and gray. like you noticed there will be only 12V there for 1-2 secs after the key is turned on. this is to prime the system. if you try it more than 3 times it usually will stop showing voltage there until the key is turned to start. a quick bump against start with the key will reset the 3 times.

this will eliminate relay failure. you say that it tests every time with the relay out but that does not mean the actual contact is connecting. that just means the relay is being told to do its job

 

[mwildman007]

so i checked the voltage at the connector its all good then i pulled the tank out and the pump was working!!!!!!! changed the filter and whammo she started ha 10 bucks is better than 100 thanks for all the help guys