Running Rough

[digdugg]

I have a 95 GA SE, 2.3L DOHC.

When I start it and its idling it runs smooth most of the time, when I put it in gear(Drive,Reverse) it boggs down and begins to spit and sputter, with some backfire, if I drive it in either, it has no power and backfires constantly.

I have taken it in to read the codes. No codes came up. :confused:

I have changed the knock sensor, the crank case sensor, the oil, the plugs and cleaned the fuel injectors, I've replaced the vaccum hoses that needed replaced.

Any ideas where to go from here?

TIA
D

[andrewe77]

fuel filter?

[digdugg]

oops! I forgot about that....i already changed along with all the other things.


D

[2Dambad]

Ignition coils. That solved it on my old 95.

[digdugg]

had it replaced a few months age, and while having it scanned for codes retested the coils.

D.

[andrewe77]

air filter? plug wires? fuel pump tested for flow and pressure?

[digdugg]

I have had it scanned for codes, no codes came up. Here's a recap of what I have done.......
I have checked the coil housing for cracks,(none) the coils are fine(the whole coil and housing was replaced a few months ago), the plugs have been changed, changed the oil, changed the knock sensor, crank case sensor, cleaned the injectors,changed the fuel filter, changed any old vaccum hoses, the air filter is clean... ummm I'm sure I am forgetting something. the idle is starting to smooth out, but when put in drive or reverse it boggs down and starts the miss and backfire. any further ideas are greatly appreciated.

D.

oh yeah I replaced the muffler system about 2 months ago.

[swordfencer]

Throttle position sensor could be going bad.

[cavingman]

same thing happened on my 94 when my tps was bad... check that...

[digdugg]

ok if someone can tell me where on my engine it is located that would be great.....the book well lets just say it doesnt....

D.

[koolZ71]

have u ever tried to decarb ur injectors and ur intake

[digdugg]

Found the Throttle Position Sensor and the Idle Air Control Valve, cleaned the IACV. Idling is now not a problem in Park. Does that alot better now. Once I get it to idle.

I started the car and let it idle. Then took the electrical connector off each injector from left to right the first one made very very little if any change to the engine, the second killed it, the third made change but didn't kill along with the fourth. The second is what all 4 should do?

Any further Suggestions greatly appreciated.

D.