I jsut swapped a zc into my 1991 hb. i started the car and the check engine light came on i checked codes and i got 7 and 20. the car is also idling between 2000 and 3000. i checked my grounds to solve code 20 but its still there. anyone have any suggestions of how to fix these?? its a pm7 ecu.

i searched and found this, but it was no help.

https://honda-tech.com/zerothread?id=1148683


Modified by silver hatch at 12:33 PM 4/2/2005

 

code 7 is your tps sensor
code 20 electrical load dector

here

https://honda-tech.com/zerothread?id=978933

 

yup

 

so how do i fix them?

 

i got the idling down to ~1200, it was a vacuum line prob.

but i still have code 20 and 7. i know that they are elc and tps.

i also changed the wires on the tps plug back to the dx way(Y/R/G) (i changed it to G/R/Y when i did the swap, like you are suppose to)just to see what would happen but this had no effect on the car. should this affect anything?

how do i check the tps without replacing it?

 

what ecu are you using?

 

pm7

 

Try resetting the ecu

 

tried it