2002 Tahoe slow starting!

[keenan]

you were trying to test fuel pressure?

No, I just read somewhere that the regulator can cause these problems and to check if the regulator is faulty you take the rubber cap off and if you see fuel that means it is bad.

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[#1taho]

I haven't came across this,but i have heard of this. are you planning on a used one to try it ?

 

[keenan]

I haven't came across this,but i have heard of this. are you planning on a used one to try it ?

I don't know yet. I am going to try a little more research on it before I buy anything.

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[#1taho]

test fuel pressue. that will need to be done also. see what you have and see if it holds. if it drops quick it will need a fuel pump. 50-60psi if i remember correctly is what it should be.

 

[SLCHOE]

YES. If you pull off the vacuum line and fuel comes out of the regulator is 100% BAD.

Replace it.

The fuel pressure regulator is basically a valve that opens and closes but instead of a lever to make it switch, it uses engine vacuum and a diaphragm connected to the valve to perform the same action. The diaphragm normally is a barrier between both sides (fuel side and vacuum side) like the seal in a faucet knob. If you are getting fuel out of the regulator from the vacuum port after you pull the vacuum line off, you have a bad (torn) diaphragm.

 

[keenan]

YES. If you pull off the vacuum line and fuel comes out of the regulator is 100% BAD.

Replace it.

The fuel pressure regulator is basically a valve that opens and closes but instead of a lever to make it switch, it uses engine vacuum and a diaphragm connected to the valve to perform the same action. The diaphragm normally is a barrier between both sides (fuel side and vacuum side) like the seal in a faucet knob. If you are getting fuel out of the regulator from the vacuum port after you pull the vacuum line off, you have a bad (torn) diaphragm.

Thanks for the info. I will probably replace it tomorrow or Monday. I will update if the problem is fixed or not. Thanks!

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[SLCHOE]

Her's the step by step:

 

[SLCHOE]

You are welcome btw. Good luck!

 

[keenan]

Her's the step by step:

Thank you. I watched a fee YouTube videos and it seems pretty simple.

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[SLCHOE]

YouTube videos are great (and I subscribe to some great guys) but just make sure you don't miss some crucial steps like lubricating the o-ring before installing the new regulator or you will have to do it again.

It's cake really. Have fun.