Engine backfired and died. Lots of CEL codes
Posted: Thu Aug 24, 2017 5:10 pm
Please help. I recently bought a '92 Civic Si. When I bought it, it would sometimes hesitate if you tried to punch it from a stop or anywhere under 3000rpm. This was fine, I figured it would be an easy fix. Then it started just cranking and cranking and wouldn't start. If you stick with it long enough and wait a while it will eventually start. We thought it was the fuel pump so I replaced that, the previous owner said he replaced the fuel filter trying to fix it. It has an aftermarket intake and exhaust (shitty ebay parts I plan on replacing). After replacing the fuel pump the problem persisted. So I checked spark, 2 of the plugs had a weak spark so I replaced all 4, it ran fine for about a day but when I tried to go to class the next morning it would just crank and not start. I got a can of throttle body cleaner and cleaned it all up and it was working fine after that, starting every time. Today, I left my house to go to the store and about 2 miles down the road it backfired really loud and stalled. It wouldn't start up immediately after but I gave it a minute and it fired up and I drove it home. There was no smoke or anything, just a single backfire and then the engine died. I checked the codes and got:
3 (MAP sensor)
9 (No. 1 Cylinder position sensor)
16 (fuel injector)
41 (Heated oxygen sensor heater)
43 (Fuel supply system)
Which of those is likely to cause the symptoms I'm having? I assume the fuel injector one, how much is it to replace fuel injectors? Why am I getting code 43 (fuel supply system)? I just replaced the fuel pump, where else should I check for problems in the fuel supply system? Any help would be appreciated!
3 (MAP sensor)
9 (No. 1 Cylinder position sensor)
16 (fuel injector)
41 (Heated oxygen sensor heater)
43 (Fuel supply system)
Which of those is likely to cause the symptoms I'm having? I assume the fuel injector one, how much is it to replace fuel injectors? Why am I getting code 43 (fuel supply system)? I just replaced the fuel pump, where else should I check for problems in the fuel supply system? Any help would be appreciated!