wont start unless tb blocked PLEASE HELP!!!

[riceslayer302]

changed: TFI, IAC, ACT, CTS... still nothing, have been using the checklist.

i just cant understand whats going on, the car was running fine until it just sputtered out...

 

[jrichker]

1.) Are you sure that you have pip signal to the injectors?
2.) Do you get a fat blue spark at least 3/8" long?
3.) Have you checked the fuel pressure? Fuel pressure test gauges can be rented from the auto parts stores.

 

[riceslayer302]

PIP is inside distributer correct? how would i go about changing it? should i just get a new distributer?

how do i check the PIP? noid light flashing? where do i hook up the noid???

 

[superhuaman]

yes pip is in the dist. for the price of the part and the tool you can buy a rebuilt dist. a noid light goes in one of the fuel injector plugs. for pics of a noid light, and instructions on how to test the pip, see this thread.

 

[89streetbeast]

i just now thought of this, get under the car and beat on the gas tank quite a few times. there might be some trash in the gas tank that might be plugging the sock/strainer on the end of the fuel pump. just a thought.

 

[71swing]

It sounds to me like a Mass air problem, The car should not start or run with the mass disconnected

 

[jrichker]

i just now thought of this, get under the car and beat on the gas tank quite a few times. there might be some trash in the gas tank that might be plugging the sock/strainer on the end of the fuel pump. just a thought.

I have had the fuel pump out several times, and I can assure you that the strainer is quite large. It would take several hands full of trash to obstruct it to the point that it would restrict fuel flow enough to kill the engine.

If you have any doubts about having sufficient fuel flow/pressure, rent a fuel pressure test gauge from the auto parts store. That will tell you for sure if you have adequate fuel pressure.

 

[riceslayer302]

went through checklist, got the car running on ether.

changed fuel filter, still nothing, what should i concentrate on now???

i know now its some kind of fuel issue, so should i lean towards the fuel pump being bad? fuel pump is an electric motor, maybe when it gets hot it is shutting off, that could explain why the car runs for awhile then dies

 

[HISSIN50]

i know now its some kind of fuel issue, so should i lean towards the fuel pump being bad? fuel pump is an electric motor, maybe when it gets hot it is shutting off, that could explain why the car runs for awhile then dies

See Jrichker's post above yours.

 

[Busted07]

It sounds to me like a Mass air problem, The car should not start or run with the mass disconnected

I thought so too, but my eclipse did. Then again, that thing was possesed.

 

[riceslayer302]

few questions for you guys:

1) fuel pump runs when key is on, fuel squirts out when i push schrader, does this mean my fuel pump relay is ok and that my inertia switch is not tripped?

2) when vaccum line is taken off FPR, should fuel be escaping or not???

 

[superhuaman]

1) yes that is correct

2) hell no. if you have fuel going into the vacuum line from the regulator, it is bad and should be replaced. it would be running wayy too rich.

 

[riceslayer302]

few questions for you guys:

1) fuel pump runs when key is on, fuel squirts out when i push schrader, does this mean my fuel pump relay is ok and that my inertia switch is not tripped?

2) when vaccum line is taken off FPR, should fuel be escaping or not???

3) when can i take fuel pressure readings? does the car have to be running???

 

[riceslayer302]

glitch, double post, sorry

 

[superhuaman]

3) you have to read fp with engine running and vacuum hose removed from regulator and plugged.

 

[riceslayer302]

if i am getting fuel when pump is kicked on with key in run position at my schrader valve, wouldnt that be enough to start? it wasnt coming out with alot of force but deffinately had fuel

 

[superhuaman]

depends on the pressure, really

 

[jrichker]

few questions for you guys:

1) fuel pump runs when key is on, fuel squirts out when i push schrader, does this mean my fuel pump relay is ok and that my inertia switch is not tripped?

2) when vaccum line is taken off FPR, should fuel be escaping or not???

3) when can i take fuel pressure readings? does the car have to be running???

1.) Use a fuel pressure gauge to tell if you have adequate fuel pressure.

2.) Fuel coming out the vacuum line means the fuel pressure regulator has failed.


3.) Best test for fuel pressure is with the engine idling and the vacuum line removed and plugged. Second best is with the engine off, ignition switch in the run position. Both should show 38-41 PSI.

 

[riceslayer302]

the vaccuum line off the fuel pressure regulator right?

im gonna have this damn thing fixed by this weekend if i get the time

 

[jrichker]

the vaccuum line off the fuel pressure regulator right?

im gonna have this damn thing fixed by this weekend if i get the time

Fuel coming out of the vacuum port of the fuel pressure regulator, or fuel in the vaccum line that connects to the regulator means the regulator has failed. All that fuel dumped int the engine floods it and can wash the oil off the cylinder walls.

If you are curious, here's why:
The regulator has a diaphram with pressurized fuel on one side and vacuum on the other. The fuel side has a spring loaded valve that is attached to the diaphram. An increase in the fuel pressure causes the valve to try to close, but the spring balances it out, maintaning the set pressure. The vaccum causes the diaphram to work against the spring to reduce the fuel pressure. The balancing act between the vacuum, fuel pressure and spring work together to insure that no matter what the manifold pressure is, that the fuel pressure at the injectors is always the same. Vacuum reduces the fuel pressure and pressure from a supercharger or turbochanger increases the fuel pressure.