I have a 1994 civic Ex with i/e, i went on vacation for a week and left it sit. my car was running great when i left then when i came back it felt like it was missing and stumbling and just running like crap. I replaced injectors, Fuel Filter, REgulator, 02 sensor and the pressure is 40 psi, but it still runs this way. I have researched this problem and found nothing to help so any help would be great.

 

What were the fuel pressures with and without the FPR vacuum hose attached?


Are all of the fuel injectors clicking?

 

check for vacuum leaks, thats the only other thing it could be.

 

i checked it with everything hooked up and was at 40 psi and i am not sure wat vacuum line to check first

 

If you didn't also check the fuel pressure with the FPR vacuum hose disconnected, then you don't know whether the FPR vacuum hose is working. Are the injectors clicking?

 

anyone messed with the tps and map plugs?

 

injectors are clicking and no one has messed with the map or tps

 

if you disconnect each fuel injector one at a time while the engine is idling, do some disconnected injectors make the engine run worse while others do not? Have you inspected the spark plugs to see if any differ in appearance? How do the cap and rotor look?

 

the injectors are new the the spark pugs are new thecoil is new the cap and rotor are new the control module is new the o2 is new the fuel filter is new

 

i did clean the throttle body out with TB cleaner i dont know if that would to of hit the TPS or MAP if that would cause something

 

I read this in your original post. If the injectors worked all by themselves, then this would also be the final answer. However, the fuel injectors must receive power from the main relay and a signal from the ECU to know when to fire. These signals are relayed through wires. Hence, the unplugging test has some potential to yield important information.

Other items worth testing: Fuel pressure without FPR vacuum hose attached and the ignition coil.

Good luck

 

i unplugged the injectors one at a time and it ran rougher then what it originally does, not sure what the test is supposed to do

 

If disconnecting one of the injector clips had failed to make the engine run worse, then there is a problem in the circuit for that injector.

 

so since it ran worse then everything is fine with the circuit,, oh and the ignition coil is brand new so i know that is not it.. but what would happen i i just unplugged that vacuum hose would that determine anyhing

 

Yes, the injector circuits appear to be fine.

It might be interesting to see whether unplugging the FPR hose has an effect. Make sure you block the end of the disconnected hose with your finger when you do the test. Otherwise the engine idle speed will increase. When you do this, also check whether the hose is pulling vacuum.

 

ok i pulled it and it had vacuum and when i plugged it, it stayed at the same speed

 

but before i blocked it the idle went up and down

 

That's normal. Block the end of the disconnected FPR hose with something so that you can rev the engine to see whether the engine still misfires.

 

it only misfires when driving it, so would be ok if i blocked it and drove it and which end the one attached to the mani or the one on the regulator

 

Yes. Block the end of the hose leading to the IM. This will prevent a vacuum leak.

Do you have or can you borrow a timing gun to check the ignition timing?

 

no but i dont think its the timeing cause it was running fine a two weeks ago i was gone for a week then ran like crap when i got home it was sitting but was started twice

 

ok i plugged it and drove it and it did the same thing

 

This wouldn't rule out a timing issue. You must consider anything that fits at this point.

 

but would timing make it stutter below 2000 rpm

 

It's possible. Hooking up a timing gun and jumping the service connector are pretty easy.