anyone had p0313 along with a specific cyl. misfire? p 0313 is low fuel and is specific to cyl. 4 misfire . where does the car determine a low fuel condition exists? o2 sensor? if so can i assume a bad injector?

 

also ; can these injectors be cleaned? remove screen ,that type of thing, or are they throw aways?

 

How about running a couple of tanks of gas with fuel system cleaner/injector cleaner thru it, clear the code and then see if it comes back?

 

May be a clogged injector; try the cleaner method first and work your way up from there.

 

tried all that for a while now. was waiting for it to become steady rather than intermittent. turns out it was my screamin' deamon coil . swapped the plugs;nothin' ; swapped the deamon and off and runnin' . so maybe #4 is the one the computer spits out when there's a problem with that halfe of the coil. don't know . still don't understand the low fuel thing. i've been adding injector cleaner for about 5 tanks now.

 

Goes to show that the codes aren't always that helpful. Glad you found the problem.

 

but rarely fail. The seals can dry and you can get a vacuum leak as well. For cleaning them, I sent mine off to Witch Hunter Performance (I think it's www.witchhunter.com) for cleaning and flow testing. They replaced the seals and the intake filters, and ultrasonically clean the pintel/seal while squirting stuff through them. Then they flow test them. Mine came back matching to 1.1% high to low. I think it was $60, including shipping.

Matt

 

thx very much doc i WILL do this. 60 bucks is cheap for all they did.

 

Follow the wiring harness for the injectors and unplug and clean the connectors in the harness. I had a car with this same problem and just unplugging and reconnecting did the job. Good luck.

Steve