I have a 1990 Integra it has b18a1 my code has a CEL Code 43 fuel sytem. When i go to pump gas the nozzle throws the pump out like if its full tank but it isnt i got to be be pressing on the nozzle to pump gas. My car also idles after i press the throtle. PLEASE IF SOMEBODY COULD HELP ME!! THANKS !! MERRY CHRISTMAS!!!!!!

 

I have an OEM Service Manual for a '92 Integra and here is what it says (I'm sure it applies to your car too).

*** Check Engine light indicates code 43: Most likely a problem in the Oxygen (O2) Sensor circuit or a problem in the Fuel Supply System. ***

TROUBLESHOOTING FLOWCHART

Note: I started to type down the flowchart on here for you, but this message board is not advance enough to make it understandable. I'll just tell you the gesist of it and you can tell me want you need and I will then post it up for you.

Is 43 code accompanied by the Check Engine light and poor drivability?

- YES.....check fuel supply system (there's another chart on this)
- No.....do the ECU Reset Procedure

NEXT:
Warm up engine to normal operating temperature (cooling fan comes on). Hold engine at 3,000 RPM for two minutes (A/T: Transmission in N or P).

Is the Check Engine light on and does it indicate CODE 43?

- YES.....this comes from CODE 1 which is O2 sensor (there's a chart on this)
- NO.....Intermittent failure, system is OK at this time (test drive may be necessary). Check for poor connections or loose wires at C216, C317, C318 (located at left shock tower), C122 (O2 sensor) and ECU.

NEXT:
Turn the ignition switch OFF

OMG.....the next part of the flowchart goes into testing your harness at the ECU (electrical is a pain in the a$$). You need a jumper wire and a voltage meter to do this part. It gets quite complicated in this section. I'm going to stop here, but if you need it, let me know and I'll post it.

Hope this helps you get started.

 

Integras can be hard to pump gas into if your not use to it. With mine I have to just have the tip of the pump in other wise it stops thinking its full. And fast delivery pumps I can only use about half trigger on the pump handle.

Error 43 id say its most likly the o2 sensor or the fuel pumps on the way out.

 

i Havent all that testing but when im driving the car the CEL pops up and when i turn off the car. I warm up my car and then i step the throttle and let go to the throttle it begins to idle to 2500 rpm

 

Okay, I'm going to assume that it's the fuel supply system that is messed up. AGAIN, I'M ASSUMING. I'm not a mechanic. I just have the service manual that tells me what to do. Also, I'm basing what I say from my own personal experience and hope that it'll help you.

In the manual, there is a System Troubleshooting Guide. This is the chart I mentioned earlier when you're getting CODE 43 and poor drivability. NOTE: The sources of a symptom are ranked in the order they should be inspected starting with (1).

ROUGH IDLE
(1) fuel injector
(2) contaminated fuel

POOR PERFORMANCE
*Misfire or Rough Running
(1) fuel injector
(2) contaminated fuel
(3) pressure regulator

*Fails Emission Test
(1) pressure regulator
(2) fuel injector

*Loss of Power
(1) fuel pump
(2) fuel filter
(3) fuel injector

I think this is the second or third time I've posted this chart. Give this a shot. Like everyone says, it's hard to tell without phsyically being there to test the car. If your car is not dying, I'm sure it's still getting fuel so that means the fuel pump is still good. Maybe you should clean the fuel injectors and test the pressure regulator. The chart kind of points to those two the most.

What you don't want this to be is an electrical problem. Electrical is a pain to track down because it could be anywhere and takes a lot of time if you don't know what you're doing. Plus, you can cause damage to other working parts if you're not careful.

 

I did what you told me to do to rev the car to 3,000 rpm and CEL turn on with Code 43 but the think is that i didnt reset the ecu. The CEL Comes on when i drive and then i turn off when i shut down my car it goes off and then i start my car again it does the same. I just replace the Pressure Regulator. And by the way do you what is the problem with pumping gas. When i go to pump gas i push all the trigger of the nozzle and it shuts down like if the tank is full but isnt. I got to pressing and letting go of the trigger to pump THANKS FOR YOU HELP

 

Well, if you look at the troubleshooting guide again, it says that if you rev to 3,000 rpm and if the CEL comes on with CODE 43, then that code is coming from CODE 1, which is the O2 sensor.

Here is the troubleshooting guide for the O2 sensor from the manual.

The Oxygen sensor detcts the oxygen content in the exhaust gas and signals the ECU. In operation, the ECU receives the signals from the sensor and varies the duration during which fuel is injected. The oxygen sensor has an internal heater. The heater stabilizes the sensor's output. The oxygen sensor is installed in the exhaust pipe. (I think we all know what the O2 is for, but I thought I would write it just incase. Sorry, didn't mean to insult anyone's intelligence.)

- Do the ECU reset procedure

Here's how you do it.
ECU reset must be done after any troubleshooting
1) Turn the ignition switch off.
2) Remove the BACK UP fuse (7.5 A) from the under-hood fuse/relay box for 10 seconds to reset ECU.

- Warm up engine to normal operating temperature (cooling fan comes on).

- Run engine for 60 seconds

- Road test with the transmission in 2nd gear (M/T: 4th gear). Starting at 1600 rpm, accelerate using wide open throttle for at least 5 seconds. Then decelerate for at least 5 seconds with the throttle completely closed.

- Is CEL on and does it indicate CODE 1?
* YES --> Perform test for CODE 43 again.
* NO --> Intermittent failure, system is OK at this time. Check for poor connections or loose wires at C216, C217 (located at right shock tower), C317 (located at left shock tower), C122 (O2 sensor) and ECU.

I'm sure you don't know what C216, C217, etc. are. I didn't for the longest time until I final realize that those numbers respresents a location on the car. It's the way the manual tells you where to find a wire on the car. EX: C217 is right shock tower.

Anyway, give this a shot to see if it'll solve your problem or at least point you to the right direction. You might also want to try swapping out the ECU with a known working one. Borrow one from a friend. Maybe you have a bad ECU.

Good Luck