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Problem for Chevrolet 2003 Impala

I CANT GET MY 05 impala to hold fuel pressure a

By carmanat on Nov 05, 2009

" "

i CANT GET MY 05 impala to hold fuel pressure a regulator with key on goes up 50-60 when key is turned on but drops right down have replaced fuel filter,pump,injectors and regulator still no help and has cly 1 miss fire code

Comments:

Nov 05, 2009

- when I turn key goes to 50-60 It starts to drop right down to 40-30 then slower after that till gone but within a min or so way down

Nov 06, 2009

- Tried that no leaks at injectors when fuel rail is pulled out. I noticed that a couple clips on fuel line back by tank are broke they had a twist tie on one and silicone on couple others could they leak pressure but not gas.

Nov 09, 2009

- fuel seems to hold around 50 for awhile with switch on now then slowly drops into the 40s. Cant get rid of no.1 cyl missfire comp is 130 someone said maybe intake gasket leaking anyway to check this.

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Clarification Request

Posted by gm tech795 on Nov 05, 2009

How long does it take for pressure to drop off ? how much pressure is lost, all of it??

Solution #1

posted on Nov 06, 2009

gentech93

Rank: Guru Chevrolet

Expert
Rating: 91%, 147 votes

sounds like #1 injector is stuck open
unbolt the fule rail lift it up and turn the key to run and see if that injector is leaking

Comments:

Nov 06, 2009

- no it would leak fuel
ok try pinching off the return line and see if it holds pressure
let me know

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