need help please

kevin 2.8
06-29-2003, 09:16 PM
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.

Korben
06-29-2003, 10:57 PM
Your injectors COULD be clogged.

kevin 2.8
06-30-2003, 12:37 AM
how do i manually clean them? i take the plenum and the fuel runners off and the injectors are under the runners?

then what

fbird95
06-30-2003, 01:48 AM
Damn sorry i cant help, I'm not all too familar with the 2.8

kevin 2.8
06-30-2003, 02:23 AM
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?

Scream And Fly
06-30-2003, 11:34 PM
Check your TPS. Also, double-check your wires.

Greg

kevin 2.8
07-01-2003, 11:12 AM
YES! problem solved

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

im going to pick the car up now