I have a stock 93 Del Sol S 1.5 I'm getting a CEL if I accelerate hard. (code 1) When I turn the car off and back on the CEL is gone until I accelerate hard again. When the engine is cold performance is good, as it warms up performance is poor. I changed the o2 sensor and fuel filter (no help) Any one have any ideas ??? Thanks in advance. Tim

 

check your wireing on the back of the block make sure there is no some what brokeing wires

 

I looked for bad wires between the o2 sensor and firewall and didn't see any. I have a Honda shop manual and started T/S at page 11-43 Heated o2 sensor. It takes me down the page to code 43 page 11-47. The manual says to hook up the Test harness and take some voltage checks. My question is how do I go about takeing the voltage checks with out the test harness???

 

you will need backprobes (needle like electrical testers) and a diagram of the ecu connectors. just pull the ecu frome the mounts locate what pin u need to test and TEST!!

 

[QUOTE=tico;40834880]you will need backprobes (needle like electrical testers) and a diagram of the ecu connectors. just pull the ecu frome the mounts locate what pin u need to test and TEST!![/QUOTE




Thanks, sounds like I might be a while.

 

https://honda-tech.com/forums/hybrid-engine-swaps-18/%5Bfaq%5D-%22my-vtec-doesnt-work%22-1812135/

half way down the page is troubleshooting for obd1 CEL for O2