I have an 87 camaro lt. I have been having troubles with it missing and jerking, at first i thought it might be water in the gas, however this was not the case. I did a tune up and replaced my fuel filter and pressure regulator. neither of them made any difference. While troubleshooting i thought i would check the pressure in the fuel and when i tried to release the pressure a lot of air came out and when i started it again the car ran great for about 10 mintues, until the air built up again and started to do the same as before, so obviously this is the cause of my problem. Basically i am just wondering how air could have gotten into the fuel rail and what steps i should take to solve this problem without costing me a whole lot of money replacing parts until it works. PLEASE HELP!

 

If there was any air in the fuel rail, it would have been pushed out through the injectors.

 

but how could the air be getting into the fuel system? and why does the car run better once i release the air?

 

Has to be a air leak on the suction side
Because fuel burns better than air

Any air in the system should be vented back to the tank before pump will pressurize the rails

 

is there anywhere or any way that i can check for leaks without dropping the tank to get access to the fuel pump?

 

I have no clue, has to be in the tank, the whole fule line is pressurized from the tank forward, it would be blowing fuel out not sucking air in.

How much gas in in the thing?

over 1/4 tank?

Maybe the fuel sock feel off

 

https://www.thirdgen.org/forums/dfi-...ment-saga.html

https://www.thirdgen.org/forums/v6/5...ess-hatch.html

https://www.thirdgen.org/forums/body...-previous.html

https://www.thirdgen.org/forums/v6/5...fuel-pump.html

https://www.thirdgen.org/forums/tpi/...ump-whine.html

 

Sounds like vapor lock. See if any fuel lines are close to the exhaust.

 

You need to check the fuel psi and see how much you have, and also see if the psi drops.

 

well I seem to be getting proper fuel pressure, so I dont see how it could be the fuel pump or anything in the fuel system, it doens't seem to be vapor lock, there are no lines close to the exhaust and it's very cold outside, making that more unlikely. is there a way this could have something to do with my ignition? distributor or coil possibly? I am running out of ideas!

 

Only way for air to get in there would be from parts of the fuel system.

How would an ignition or coil pump air into a fuel rail????

 

well i'm thinkin that this might no have anything to do with the air in the fuel, because as someone said earlier, if ther was air it would just simply get pushed through the injectors. I do have proper psi and the fuel pump in there is fairy new. so i think it may have been a coincidence to find the air in the rail. and my actual problem is the excessive jerking, which could be due to something in the ignition, couldn't it? i think i'm just pulling straws out of a hat at this point... i just dont want to have to take out the fuel pump unless i'm positive that this is the problem, and it seems like most fuel pump related problems are obvious when you first start the car, and my problem starts once the car warms up.