I wanna know where is the electric fuel pump relay on my chevy camaro z28 1991. the engine run good when he is clod but stop when he is hot i think is the relay

Question edited for clarity.
Question moved to model category.

Swap them out for genuine OEM Parts. The Chinese and Mexican ones are not well made.

https://www.google.com/search?q=2000+chevy+camaro+fuel+pump+relay

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check that fuel is getting to engine, next, are you getting spark, are your plug wires in the right order, are they all good, you must keep plug wires from touching each other, is the cap & rotor ok, coil ok, fuses ok, do you have a fuel pump relay, if so, check fuse in relay. is the fuel filter new, did any codes get stored ECM, put drygas in fuel tank. are spark plug wires fully engaged onto plugs, don't concern your self with any smoke, let's get the engine started first, CHECK EVERYTHING MENTIONED ABOVE, including fuel filter, air filter should be new also, todays fuel w/ ethanol is garbage, for older cars. is the mass air flow sensor for this car ? aftermarkets are garbage. let me know how things work out, my knowledge is not cheap, but I will help you to avoid egg on your face, KEN

What is the condition of the plugs, wires & air cleaner? Also, what is the fuel like that's in the tank. Poor fuel quality will make an engine act like yours.

might wanna check the fuel injectors when the start going bad they get a high resistance at engine normal temp

It could be a relay that keeps the fuel pump running when the ignition switch is in the run position. My jeep had this problem, where the pump gets power in the start position but once the key returns to run, the engine shortly stops running because the pressure in the fuel line drops off as it is used by the running engine, it usually died within 3 seconds. my relay was under hood and there were several of the same type in there, I switched the fuel system one with the one for my AC(which only blows hot anyway) Hope this helps...

First of all you will only have voltage for 2 seconds after key is turned on from the fuel pump relay. after that when you begin to spin the engine over oil pressure then builds up and closes the contacts on the oil sending unit causing the fuel pump to stay powered up as long as it's spinning or it's crunk and running.
so while you check for power on the tan with white stripe at fuel pump , have someone bump the engine over, if you have power up until about 2 seconds after they let off the key then check ground to pump if it's ok then you'll need a fuel pump.
If you don't have voltage when it's spun over then check the red wire coming from the oil sending unit the same way you checked it at the fuel pump.
If you have voltage then check inline fuse beside the battery. if fuse is'nt blown then check for broken wire from there to fuel pump.
If you don't have voltage from red wire at oil sending unit then check for voltage on orange wire at sending unit, if you have voltage on the orange wire and not on the red wire while someone is spinning it over then replace the oil sending unit.
If you wanna do a quick check that makes sure your relay isn't the problem Go to your 12 way diagnostic connector under dash by stearing wheel. and touch a battery hot wire to pin G if relay is ok the you should hear the fuel pump come on.

Check to see if there's power at the fuel pump when cranking the engine. If no power, check the relay and oil pressure sender switch. If the engine looses oil pressure, it stops the fuel pump from running to protect the engine. The relay is located on the firewall above the master cylinder.

check fuel psi at fuel rail with fuel tester, if u think its a fuel problem.
prob a spark prob. check spark with spark tester.

1994 Chevy Camaro 3.4L V6



Fuel Pump Relay Location
Behind LH Dash Mat Location:
The fuel pump relay is attached foot rest bracket under carpet, forward of left kick panel

Hey My Fellow Member of the Auto DIY World & World I Hope this Brings smiles and A solution to your Problem as it is My Goal and Mission to Help you .. EASY now rejakwilson

located under the left kick panle.