98 hx with z6 head obd2->obd1 conversion harness with a p28 ecu

car ran good since i got it 2 weeks ago

went to start it this morning and it would not start... cranked it a few times and it started but idled extremeley low when i gave it gas it would die if i just tapped the gas and let off really quick it would die than idle really low again... on top of all that it was throwing a ton of codes (5,7,10,1,6,41) eventualy it started and ran fine just throwin code 41 (always has thrown code)

after work i go to start it and same deal but this time the battery dies but it only take 2-3 cranks for the battery to die so i replaced it but it still does the same deal except now i go to start it and when it finaly does run it idles at 2.5 - 3k

any ideas or similar situations?

 

ttt

 

now it will only start and run ok if i unplug the ecu for like 10 seconds and plug it back in

 

What over mods have you done to the car. Why are you using the P28? Custom tuning?

Try running the car with a P2E or P2P or whatever ODB2 ECU came with your car.

Try fixing the 41 CEL.

I also had wierd problems starting when my harness was not tightly grounded at the thermostat housing.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sql_civic &raquo;</TD></TR><TR><TD CLASS="quote">What over mods have you done to the car. Why are you using the P28? Custom tuning?

Try running the car with a P2E or P2P or whatever ODB2 ECU came with your car.

Try fixing the 41 CEL.

I also had wierd problems starting when my harness was not tightly grounded at the thermostat housing.</TD></TR></TABLE>

i have yet to check grounds good idea though.. its just a stock p28

it did it agian tihs morning and i unpluged the ecu for 10 seconds pluged it back in and it ran... :weird:

 

I'm not sure I get what you got going on here. Why the OBDII to OBDI conversion? If your car is a 98 you should just run the straight ODBII unless you've made mods like FI or N/A high compression.

Code 41 is a serious problem. It indicates a problem with the primary HO2 sensor or with the related wiring. This sensor provides critical feedback to the ECU so it can regulate the proper air/gas mixture runnng our engine. It's very possible that the ECU has decided to go into "limp mode" which means it is bypassing the feedback info and using preset air/fuel values. When you reset the ECU you could be deactivating limp mode for a shot while.

Start by checking if your primary ECU is plugged or there are no wires loose. Then you might go out and get a new HO2 sensor.