Fss bank 1 open

CORVETTEDAVE

MEMBER
1997 GMC C1500
V8
2WD
AUTOMATIC
130,000 MILES

Truck will not start like its starving for fule dump gas in throtle body starts and runs, scanner says fss bank 1 open fss bank 2 open

Tuesday, July 12th, 2011 AT 4:41 PM

12 Replies

KHLOW2008

MECHANIC
41,814 POSTS

What were the EXACT trouble codes?

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Tuesday, July 12th, 2011 AT 4:55 PM

CORVETTEDAVE

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Originaly I had a cracked head changed heads got code 1345 dist in wrong fix that wont start and the only thing on the scanner is fss bank 1 open and fss bank 2 open no codes

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Tuesday, July 12th, 2011 AT 7:09 PM

KHLOW2008

MECHANIC
41,814 POSTS

I went through the complete diagnostic code table and could not find any reference to the phrase "FSS".

Symptom indicates a fault with the fuel system and it could be the fuel injectors that are not getting power or pulsing.

Do you have any sparks and fuel pressure?
Are the headlights working?

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Wednesday, July 13th, 2011 AT 2:26 PM

CORVETTEDAVE

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Yes I have 45 lps fuel preassur lights work once it starts I can keep it running by pumping the gas, I thought there might be a leak on the intake so I pulled it last night have about 30 minites left and I see ir that it, this is a vortec 350 1997 gmc truck

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Wednesday, July 13th, 2011 AT 4:04 PM

KHLOW2008

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41,814 POSTS

That means you have a problem with the idling.

E
NGINE WILL NOT IDLE

S
ymptom Definition

Engine starts but will not run at idle.
Engine runs if accelerator is held at part throttle.

Possible Causes &
Corrections:

l
a ) Problem is most likely in Idle Air Control (IAC) system.

B ) Check EGR system.

C ) Check park/neutral switch.

D ) Disconnect MAP sensor. If condition is corrected, replace sensor.

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Wednesday, July 13th, 2011 AT 5:23 PM

CORVETTEDAVE

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I will give that a try and let you know

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Wednesday, July 13th, 2011 AT 10:23 PM

CORVETTEDAVE

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7 POSTS

None of that worked you should just put a carb back on them someone might no what the **** is going on

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Friday, July 15th, 2011 AT 5:02 AM

KHLOW2008

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Get a compression test done to see if they are within specs.

When rpm is increased to 1000, does the engine idle smoothly?

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Friday, July 15th, 2011 AT 1:06 PM

CORVETTEDAVE

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They are at about 190 lbs no engine wont start uless you put fuel down throtle body so it wont idle I can keep it running at about 2500 rpms

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Friday, July 15th, 2011 AT 8:24 PM

KHLOW2008

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With fuel down thr throttle body, it means you have a fuel problem and we shuld turn our ttention to that first.

Check the fuel pressure. Ensure fuel pump is working, at least when ignition is turned on.

From your description of the FSS, my best guess is it is something to do with Fuel sensors, just don't click so I am not able to fill in the blanks.

Ensure the fuel pump is working and you have fuel pressure at the fuel rail.

Nex is to check the fuel injectors, their wiring circuits and ensure the circuits are pulsing.

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Saturday, July 16th, 2011 AT 11:57 AM

CORVETTEDAVE

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Thars what I thought put new fuel pump in have about 55 lbs at fuel rail I dont have a noid light I will try it with a meter

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Sunday, July 17th, 2011 AT 5:21 PM

RIVERMIKERAT

MECHANIC
6,110 POSTS

Corvettedave, were you able to get your truck running?

If not, check the injector relay, to make sure it is energizing. If not, remove it and use your meter to determine whether it's receiving power. Check the grounds for the injector circuit.