Hello guys I'm pulling my hair out trying to fix the problem im having. I've been dealing with this for months now. My 92 integra all stock b18a1 manual tranny keeps turning off. I have replaced dizzy, sparkplug cables, sparkplugs, cleaned iacv, cleaned throttle body, good battery wires, j have fuel pressure and spark. So I'm 99% sure it's electrical. It will just turn off no sputtering or hesitation just switch off my engine. When this happens i can't puah the clutch in and release and let it "push start", I HAVE to turn the key to turn jt on again. Every once in a while it will catch it's self and it will turn back on right after turning off, but not often. There is no patterns to it some times I can go a whole day with it turning off 0 times and some days it'll be almost u drive able because it turns off so constantly. PLEASE help me with this problem lol

 

start the car and wiggle the key in the ignition with it running and see if it sputters/shuts off. Sounds like maybe a potential ignition switch or main relay issue.

 

Ok so I turned the car on, let it idle, and wiggled and moved the key around as aggressively and randomly as I could without accidently turning the car off and nothing happened, still idled normally at 650 rpms no misfires or sputtering or anything. Should I replace my main relay?

 

Well I Wouldn't just start replacing parts hoping you find the issue. If you have another one laying around or can maybe borrow one for a few days then for sure go for it. Are there any CEL or battery lights on prior to a shut down?

I had a 98 ls once that had the same issues you had, would randomly stall sometimes daily sometimes weekly and if you let the clutch out and the rpms dropped off it would catch itself and be fine. turned out the O2 sensor was trashed.

 

No battery light no cel the only time the battery light comes on is once it turns off, is there a way to test the o2 sensors?

 

O2 sensor wont effect the engine from turning off.

Might be a bad sensor like IACV or map sensor, loose ground, check your thermostat ground and clean it make sure its contacts are clean.

 

Have you checked all ur ground wires? Make sure they are getting metal contact.

 

Just read ur post. Check what wunfstgsr posted

 

OK I will but as far as then iacv I did clean the old one. Realized jt was making a horrible whining noise in my engine bay, so I replete it with one from tbe junkyard and it still has the problem so I was assuming it wasn't that.

 

OK I will but as far as the iacv I did clean the old one. Realized it was making a horrible whining noise in my engine bay, so I replaced it with one from the junkyard and it still has the problem so I was assuming it wasn't that. It stopped making weird noises once I out the junkyard one on

 

So j saw online to test main relay there should be a certain number of clicks when turning the key so I tried it, when the engine light goes off after turning the key to the on position I read there should be a click in the main relay under the dash, my car doesn't have that click. I tested it in my cousins 93 integra and his does indeed click when the engine light goes off

 

Main Relay Fix, Troubleshooting (Honda, Acura) and how to solder