V6 Tech 1967-2002 V6 Engine Related

need help please

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Old Jun 29, 2003 | 08:16 PM
  #1  
kevin 2.8's Avatar
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From: ONTARIO CANADA
need help please

hi

im going to tell you whats wrong and a list of parts ive had replaced

the car is a 2.8 mpfi 85 camaro berlinetta 4speed auto with od and 98,000 kilometers

it has a hesitation problem only sometimes, and when it hesitates the worse i feel the backfire in the intake.
it used to chip the tires when i wanted to get it moving
im getting bad milage, i think it is running rich as it killed my o2 sensor and made my manifolds turn blue and leak
i get 300 kilometers to a full 55 litre tank (about 185 miles?) of highway, a month ago i was getting solid 450 kilometers per tank and i dont keep to the slow lane much.
the car feels less powerful and it downshifts constantly to try and keep speed. when i accellerate it feels like it doesnt have much power until it gets above 4000rpm
when i drive on flat roads i can feel a slight surge like someone is rocking my seat slightly

those are all the symptoms i can think of trhat started a month ago that it didnt used to do. i drove it all winter.

when i got the car last summer 25,000 kms ago i replaced
plugs wire cap rotor
pcv valve
air filter
recently in the past few weeks ive had replaced
coil
starter solonied
air filter
tranny fluid
fuel filter
plugs
cleaned iac
i had the cat cut off to see if it was plugged and it is not.
cleaned engine temp sensor connection
run lots of fuel injection cleaner


i always get the oil changed on time with 5w30

hope i can get some help as its a bugger having my car break every long weekend it seems. i have the next few days off and weas planning to go on a 4000km road trip to visit parents but am not as the car isnt working well.
Old Jun 29, 2003 | 09:57 PM
  #2  
Korben's Avatar
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From: Dallas, TX
Your injectors COULD be clogged.
Old Jun 29, 2003 | 11:37 PM
  #3  
kevin 2.8's Avatar
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From: ONTARIO CANADA
how do i manually clean them? i take the plenum and the fuel runners off and the injectors are under the runners?

then what
Old Jun 30, 2003 | 12:48 AM
  #4  
fbird95's Avatar
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Damn sorry i cant help, I'm not all too familar with the 2.8
Old Jun 30, 2003 | 01:23 AM
  #5  
kevin 2.8's Avatar
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From: ONTARIO CANADA
i think i reset the computer, i pulled the large metal fuses out for 1/2 hr

no change


im going to take the rotor off to see if its got water tomorrow before i go to the shop

im taking it to an exhaust shop ill get them to patch my leak a bit.

is there a better way to clean injectors than the gas additive?


oh an how about my fuel pressure regulator, how do i test that?
Old Jun 30, 2003 | 10:34 PM
  #6  
Scream And Fly's Avatar
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Check your TPS. Also, double-check your wires.

Greg
Old Jul 1, 2003 | 10:12 AM
  #7  
kevin 2.8's Avatar
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From: ONTARIO CANADA
YES! problem solved

my distributor cap was coming out and set the timing off 20*

im going to pick the car up now




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