87 camaro V6 mpfi fuel delivery problem
 

I recently bought an 87 V6 Camaro it was not running when i bought it. When i got it home i got it to run with starting fluid so i think its a fuel problem. with the key on, one of the wires runing to the pump has 5v and and the other show 12v but only when we try to start it and for 2 seconds after. i connected a fuel pressure regulator and it showed 0 consistently any advice would be appreciated thx

Re: 87 camaro V6 mpfi fuel delivery problem
 

Helping with project: we know there is gas in the tank and the SES light is on the whole time. Confirmed ground to fuel pump and can feel vibrations when when pump is energized. Also tried bypassing fuel pump relay and giving the fuel pump wire (tan) a 12v+ connection from battery and had plenty of time to prime and nothing also the pump in this rig is alot quieter then mine in my 91 5.7 firebird are they supose to be the same?

Re: 87 camaro V6 mpfi fuel delivery problem
 

:thumbsup: You connected a fuel pressure gauge , and it read 0 . You can hear the pump run for 2 sec when the key is first turned on . The 2 second thing is exactly what it should be doing so you now know 100% that this is not an electrical problem . Hearing the pump run does validate the electrical end of things , and so now you have to look at the fluid end of things . Have you replaced the fuel filter ? it could be totally clogged and killing your fuel pressure . I would , in this situation , disconnect the fuel line going into the fuel filter , stick the disconnected hose into a gas approved container , and run the pump for it's two second prime . I'll bet you find no fuel in the jug after the two seconds pass . If this is true , you now know the tank has to come out as either the rubber line from pump to sender has rotted off , the pump itself has failed (bad impeller type failure that would let the pump motor run but pump no fuel) , or , and this in my opinion could be the worst possible scenario , that the tank itself has rusted enough inside to have filled the pick up "sock" with enough rust to stop the passage of fuel .

Re: 87 camaro V6 mpfi fuel delivery problem
 

Ike in your car though the cut out the back sheet metal so you don't have to drop the tank

Re: 87 camaro V6 mpfi fuel delivery problem
 

Not entirely, he may be getting voltage there, but it does not mean it is enough.

Don't cut your car up. It's really not that hard to remove the tank and put it back.

Re: 87 camaro V6 mpfi fuel delivery problem
 

The bulk head connection in the back can go funky, had to wire around mine.

if the pump doesnt even come on after trying to crank it a few times, dig into it. [ once the engine builds 7psi of oil pressure, the back up switch kicks on ]

Re: 87 camaro V6 mpfi fuel delivery problem
 

:thumbsup:

Re: 87 camaro V6 mpfi fuel delivery problem
 

Just because the pump is vibrating inside the tank doesn't mean it's pumping anything. Disconnect the inlet to the fuel filter (better yet, remove the fuel filter and replace it) and check for fuel coming out of the line with power connected to the pump.

Re: 87 camaro V6 mpfi fuel delivery problem
 

:thumbsup:

Re: 87 camaro V6 mpfi fuel delivery problem
 

I am working in it with him and it was already cut out. And when we bumped the starter the pump would pump for a bit we were ting to build pressure that way but nope.

Re: 87 camaro V6 mpfi fuel delivery problem
 

I don't know how a Camaro is set up but I had a 86 Buick Century where there was a 2 inch rubber hose, between the pump and the pipe going out the gas tank, which was split. Pump ran but no pressure.

Re: 87 camaro V6 mpfi fuel delivery problem
 

All Fi system have rubbe near the tank and under the hood. If it was all solid line it would break about ever 5000 miles from fatigue.

brake lines can be solid, as nothing moves.

PS again, rubber, hard lines would break.

Re: 87 camaro V6 mpfi fuel delivery problem
 

first of all thank you all for your advice and my apogees for not responding sooner between life and working a 16 hour shift at work i didn't have time until to day. i disconnected the fuel line after the filter and when the pump kick on it did produce fuel (the fuel filter looked new) so now I'm confused is it possible to have the line between the filter and the motor be clogged ?

Re: 87 camaro V6 mpfi fuel delivery problem
 

unhook the line under the hood........