Hey all new around here looking for some help. I have a 91 civic lx sedan auto that will run fine until it warms up then die and not start back up until its cold again and do the same thing. No cel until you try starting it again after it dies then shows code 16 for fuel injectors but I dont understand how that could be the issue since it starts and runs fine until its warm any input on this before I spend the money on injectors and turns out not being the problem have other projects I'd rather put the money into

 

No cel after starting when its cold until it dies after warm up

 

Problem eliminated by unplugging O2 sensor?

Also try resoldering the main relay, which is known to have bad solder joints.

 

Didnt even think of unplugging o2 I can try in a little bit here. Tried another known working main from a buddies car no change

 

Didnt get a chance to go to car today hopefully tomorrow. Is o2 bad if its fine after that or something else?

 

Correct

 

Alright thank you I'm gonna hope that fixes it unfortunately other things keep getting in the way of going to the car. I'll keep you updated when I finally get a chance to check

 

Finally got a ride out to my car disconnected o2 and let it run till it warmed up shut it off and she started a few times with a little hesitation so guessing that's it I should be able to get a new one today so hopefully she'll be good to go. Thanks for the help!

 

Got o2 changed and will start back up but takes a good bit of cranking. No cel but still shows code 16 gonna try fuel filter since its cheap and see what happens and hope I don't have to change injectors. Any other ideas I hear the fuel pump prime when I turn the key to on so dont think its that

 

Also to note rpms are at 900-1k but after shutting it off when warm and starting back up after the hesitation the rpms are at 2k

 

You may have an intake air or vacuum leak, a leaking FITV, or the idle speed needs adjustment.

 

Turns out my throttle is a lil sticky I was able to nudge the pedal up a bit and it'll drop back down

 

Some brake or carburetor cleaner should prevent it sticking open in the future.

 

Awesome I was thinking I'd have to change the cable or something

 

Well another problem before parking it for winter the brake pedal had no pressure would go to the floor car would stop but slowly move forward while on brake. Did a lil research and decided to change front calipers (rear is drum). Got new calipers pads and rotors and blead it well (gonna try again) now it no longer slowly goes forward but pedal still goes to the floor. Thinking either MC or booster not seeing any leaks from either or the lines. If it is mc or booster would I be able to use the booster from a 91 integra or any other honda\acura models? Thanks for all the help

 

Start by replacing MC.

 

Was able to get a cheap MC from a buddy he said it worked when he parted out the car just wondering if theres some way I can test it before I install it or will it just not bench bleed if bad

 

You would need to install it.

 

Damn alright thanks

 

Alright now it runs and drives fine no cel or codes showing but after driving for a while doesnt want to start back up it will after a few tries but takes a bit. Did notice that now the key doesnt like to turn all the way back to pull it out could this be causing the issue or something else plan to replace ignition anyway just dont have the funds now.