cel 43 please help!!

[kit88]

Hi, my d15b7 is running rich and I have a 43 cel (fuel system), I already change my fpr and reset the ecu but again cel 43,
The car has bad low idle, and more when I turn on the a/c

any ideas???

[Honda4VW]

Make any timing adjustments lately?

[Chiovnidca]

Hi, my d15b7 is running rich and I have a 43 cel (fuel system), I already change my fpr and reset the ecu but again cel 43,
The car has bad low idle, and more when I turn on the a/c

any ideas???
How bad is the idle? Is it running on all 4 cylinders? A large vacuum leak can cause code 43.

[Misfit]

How bad is the idle? Is it running on all 4 cylinders? A large vacuum leak can cause code 43.


im gonna have to go with the bad spark plug or wire and the car isnt running on all cylinders on this one. just a guess though its hard to e-diagnose a car

[Turbokraft]

If you have a dvom and a schematic or pinout of the ecu go to pin d 14{white wire bordered by red/white and red/yellow} measure the voltage there with the engine running, if the voltage is above .5v the engine is running rich, below .4v it is lean. rev the engine to about 3k and hold it there, the voltage on this wire should change about one time per second from .8v to around .2v continiously, drop the throttle quickly and the voltage should drop to .2v or lower as the revs decend. Rapidly pump the throttle to purposely enrichen the afr and the voltage should rise to .7v or so. If there is little or no response from these tests you have a defective 02 sensor, or a shorted/grounded wire from d14 to the 02 signal wire. As an alternate, testing can be performed at the 02 itself but the other method is prefered as the ecu must see the signal and wiring problems are more easily resolved when testing from that end. If the sensor is responsive then check the fp, changing the reg will not open a pinched return line. This code generally means the ecu is unable to control fuel but it relies on the 02 for feedback and the engine will usualy run rich. Other causes of rich runnig might be map sensor/vacuum supply, coolant sensor error, or IAT

[kit88]

Make any timing adjustments lately?

Yes, I advanced 2 degrees

[kit88]

How bad is the idle? Is it running on all 4 cylinders? A large vacuum leak can cause code 43.

The car is idling between 200-600 up and down, but on high rpm´s no problem.

[Misfit]

Yes, I advanced 2 degrees

theres the answer

[kit88]

If you have a dvom and a schematic or pinout of the ecu go to pin d 14{white wire bordered by red/white and red/yellow} measure the voltage there with the engine running, if the voltage is above .5v the engine is running rich, below .4v it is lean. rev the engine to about 3k and hold it there, the voltage on this wire should change about one time per second from .8v to around .2v continiously, drop the throttle quickly and the voltage should drop to .2v or lower as the revs decend. Rapidly pump the throttle to purposely enrichen the afr and the voltage should rise to .7v or so. If there is little or no response from these tests you have a defective 02 sensor, or a shorted/grounded wire from d14 to the 02 signal wire. As an alternate, testing can be performed at the 02 itself but the other method is prefered as the ecu must see the signal and wiring problems are more easily resolved when testing from that end. If the sensor is responsive then check the fp, changing the reg will not open a pinched return line. This code generally means the ecu is unable to control fuel but it relies on the 02 for feedback and the engine will usualy run rich. Other causes of rich runnig might be map sensor/vacuum supply, coolant sensor error, or IAT


I will go to an electrician shop to check the o2 sensor

[kit88]

theres the answer

Advance timing=running rich???

Solution???

[93civiccx]

If you have a dvom and a schematic or pinout of the ecu go to pin d 14{white wire bordered by red/white and red/yellow} measure the voltage there with the engine running, if the voltage is above .5v the engine is running rich, below .4v it is lean. rev the engine to about 3k and hold it there, the voltage on this wire should change about one time per second from .8v to around .2v continiously, drop the throttle quickly and the voltage should drop to .2v or lower as the revs decend. Rapidly pump the throttle to purposely enrichen the afr and the voltage should rise to .7v or so. If there is little or no response from these tests you have a defective 02 sensor, or a shorted/grounded wire from d14 to the 02 signal wire. As an alternate, testing can be performed at the 02 itself but the other method is prefered as the ecu must see the signal and wiring problems are more easily resolved when testing from that end. If the sensor is responsive then check the fp, changing the reg will not open a pinched return line. This code generally means the ecu is unable to control fuel but it relies on the 02 for feedback and the engine will usualy run rich. Other causes of rich runnig might be map sensor/vacuum supply, coolant sensor error, or IAT

Either you know your shit, or you do a damn good job sounding like you do.

[93civiccx]

Advance timing=running rich???

Solution???

Retard the timing.

[kit88]

Retard the timing.

Ok, I will, thanks, but I have a question:

any time that I advance my timing , I will get a 43 cel ????

[Turbokraft]

Most cars have an allowable error of + or - 2 degrees, the accord and prelude spec for example is 13-17 base timing. The d engine spec is given as 16 btdc with no + or - stated, however my personal experience has been that movement of the distributor will not result in fuel trim error{code 43}. With an adj. cam gear on my y7 it was necessary to slot the holes in order to get enough base timing and while tuning I have made numerous adjustments in both directions for "global changes" before making software changes. Prior to installation of the management system and with an otherwise stock engine I ran the distributor fully advanced which gave max power and fuel economy. It is always good to return to baseline settings when a negative result follows an adjustment or part replacement, it is easy and free to retard the timing. When you resolve your code 43 I think you will find timing adjustments are rewarding within reason, the allowable movement limited by the slots will pretty much keep you out of trouble, by design the distrbutor can not be "clocked wrong" as on many other makes. I assume that all your adjustments have been made with a timing light.

[dragman99]

The car is idling between 200-600 up and down, but on high rpm´s no problem.


vacuum leak.

[kit88]

My pcv valve was damaged, I already change it and reset the ecu, will see if these fix the cel 43

I will let you know guys