ECU Codes?
90crxtrem
08-16-2002, 11:52 PM
I got a 1990 CRX DX. And today i was drivin and the car started "sputtering"? It would start to die when I shifted gears. And then died and a stop light. It would like go like it was gonna die and kick back up and start to die and kick back up. Now it sputters whenever you can get it to start and u cant drive 20 feet without it cuttin off. Does anyone know what this might be? The ECU is throwin a code 1(which is oxygen content I think) 16 (fuel injectors) and 17(vehichle speed sensor). I have installed an air intake and took off the gauges to put in indiglos. I tihnk that might be the 1 and 17. But can anyone help me with the fuel injector code? How can I check if these are bad or not? Thanks and sorry for the long post but I need help gettin it runnin....
wagsaccordsir
08-19-2002, 10:25 AM
Unplug your negative battery terminal for about 30 minutes or so, then hook it back up and start the car and let it idle for about 5 minutes. This resets the ECU, and configures it based on your new modifications. If it is still throwing codes, then you need some new sensors.
88_SC_CRX_Si
08-21-2002, 06:31 PM
OBD and OBDI uses "fixed constants" in the ECU MAPS, sooo there is no re-learning going on when re-setting.
When you add a CAI, the MAP sensor will see the increase in air, then tell the ECU it needs to compensate a little more. By increasing the injector pulse width. Here again re-setting the ECU, letting idle for X amount of time, not revving, ect... will have not have any effect. Just as long as your not throwing a code(s) to begin with tho.
However, when going into OBDII there is some re-leaning going on after re-setting the ECU. Whoever this has more to do with the Long Term Fuel Trim (LTFT). Even then you do not want to re-set the ECU, after adding a mod. The ECU can update the varibles, with the new info it's receiving from the sensors. Otherwise, the ECU has to start from scratch again, while it rebuilds the info that was lost in the re-set, then learning the new info on top of it. Just as long as your not throwing a code(s) to begin with tho.
The ECU is throwin a code 1(which is oxygen content I think) 16 (fuel injectors)
Code 16 usually means the Main Relay is acting up, and about ready to fail. Or you do have one of the injectors failing. Sooo, don't go to far off, unless you want to be walking... hehehe
The code 1 "could" have been caused by the Main Relay/injector, interupting(sp) the fuel pump/supply causing a lean condition...
"Noth'in like Induction..." ;)
-Ryan-
When you add a CAI, the MAP sensor will see the increase in air, then tell the ECU it needs to compensate a little more. By increasing the injector pulse width. Here again re-setting the ECU, letting idle for X amount of time, not revving, ect... will have not have any effect. Just as long as your not throwing a code(s) to begin with tho.
However, when going into OBDII there is some re-leaning going on after re-setting the ECU. Whoever this has more to do with the Long Term Fuel Trim (LTFT). Even then you do not want to re-set the ECU, after adding a mod. The ECU can update the varibles, with the new info it's receiving from the sensors. Otherwise, the ECU has to start from scratch again, while it rebuilds the info that was lost in the re-set, then learning the new info on top of it. Just as long as your not throwing a code(s) to begin with tho.
The ECU is throwin a code 1(which is oxygen content I think) 16 (fuel injectors)
Code 16 usually means the Main Relay is acting up, and about ready to fail. Or you do have one of the injectors failing. Sooo, don't go to far off, unless you want to be walking... hehehe
The code 1 "could" have been caused by the Main Relay/injector, interupting(sp) the fuel pump/supply causing a lean condition...
"Noth'in like Induction..." ;)
-Ryan-
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