hot start

[brs86supra]

i tried to do a diagnostic and nothing happened it didnt even blink

[brs86supra]

changed my fuel filter and it looked like mud wasnt clean at all

[mrnickleye]

Normally (mostly) a dirty fuel filter will restrict the flow of fuel. So the signs of dirty one one is....the car will start and run OK up till a certain RPM, then it will start cutting out (misfiring). Dirtier ones will not allow the car to get up over a certain speed (like 50mph).

So the hard start when 'heat soaked' (as it is called) is not the filter.

Dirty injectors, carbon on the intake valves, a fuel system that won't hold the pressure after engine is off, a weak fuel pump (low pressure). These are the areas I'd be looking at if you came into the shop.

[kewlcoconut]

im gonna look into the fuel pump. how much is this part? anyone know?

[mrnickleye]

The fuel pump is in the tank, and not a joy to replace. They aren't cheap either.
I suggest doing a fuel pressure test before replacing parts.

[Burn N' Up]

What does your exhaust smell like? Smell like raw gas? Any back firing? Cleaned your air filter lately?

[kewlcoconut]

Originally Posted by Burn N' Up

What does your exhaust smell like? Smell like raw gas? Any back firing? Cleaned your air filter lately?

the exhaust doesnt smell like raw gas and to my knowledge, the car doesnt backfire. I know for a fact my filter is clean. the problem was present with the stock filter. Bought the K&N one, and it's still there. I will look into the fuel pressure test. I'm thinking thats the problem.

Thanks for all the help guys. Appreciate it. I will keep you posted on the testing.

[Synack]

that happened with my 1993 318is

[kewlcoconut]

Originally Posted by Synack

that happened with my 1993 318is

can you verify that it was the fuel pump?? or did you never get it fixed?

[kewlcoconut]

i was browsing supramania forums and came across this thread.

http://www.supramania.com/forums/showthread.php?t=15243
wtf connections are these?(pics)
"I am just wondering what these two connections are and what exactly they do.

The first two pictures are a plug that was cracked during the headgasket change. It connects two pieces of vaccume line under the intake manifold."





Quote from JonoTurbo
"First two pics are the fuel pressure regulator vsv, you definitely want to fix that."

Quote from Red Dragon
"AFAIK, Fuel VSV is for hot starts to combatr heat soak, so if your car starts fine w/o it when hot then you are good to go. I don't have mine on there either"

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The second quote struck me the most, I am going to check my car to see if that brown plug is connected to anything. If it isnt, where should it be connected to??