[old 71 cutlass]

have 93 e 250 6 cyl does not start but fuel pump runs constantly.Anyone have idea why?I think thats why won't start.

[docvette]

Originally Posted by old 71 cutlass

have 93 e 250 6 cyl does not start but fuel pump runs constantly.Anyone have idea why?I think thats why won't start.

Doc here,

Do you have any Fuel in the tank?

Are the Filters NEW and Clean?


Is there a Cut or crimp in the line?

Have you checked the fuel sock?



Doc

[ernkazern]

You may want to check the fuel pump relay. On an old relay sometimes the contacts inside "stick" and allow the pump to run constantly. Usually it's just a matter of replacing the relay. A constant supply of fuel won't keep the engine from starting. I guess the next series of questions would be:
From your brief explanation I would imagine the battery's dead from the fuel pump running constantly and that's why it won't start?
Does it crank over but not start?
If it cranks over at a normal speed, does it cough and try to start?
Like Doc asked, is there fuel in the tank?
If it cranks do you have spark?
Can you hear the injectors clicking on and off?
There's a half dozen different directions to go diagnosing the problem, but any good diagnostician would really need a lot more info. Otherwise you're going to end up throwing parts at it until you get lucky and guess the solution. That can get very expensive.

[old 71 cutlass]

does have gas and pumps out of valve on fuel rail with plenty of pressure.van sputters like wants to start but doesn't finish.It was running then sputtered once ran fine sputtered longer then died then would not start.before it died pump came on then shut off till I cranked like it is supposed to. now pump just stays on and will not crank.

[ernkazern]

If the pump stays on remove the fuel pump relay and it should stop. A quick test of the fuel pump circuits is to find a similiar relay under the hood and swap it into the fuel pump relay socket. Don't use the EEC relay though, if you do the vehicles computer will be disabled. If the pump doesn't start then you can be pretty sure the old relay was causing the pump to run constantly. Ther's lots of ways to skin a cat, but for me the next step, after replacing the relay, would be to check for spark and listen for the injectors clicking. If you have spark and you can hear the injectors clicking then I would really want to do a fuel pressure and volume test. You can't tell the pressure just by watching fuel squirt out when you crack a line open. I don't have the specs for your fuel system here, but if you need 40 pounds of pressure and you only have 25 the vehicle won't start. It'll sputter and cough but it won't stay running. You will get a heck of a shot of fuel when you crack the line open though. To be continued if needed........

[ernkazern]

If you don't have a fuel pressure gauge, like Doc said, it would be a good idea to check the fuel filter. It's relatively easy and even with good pressure you won't get good volume with a plugged filter.