cjm81

Hi I have a 1999 honda civic hatch that has a h22a1 swapped from a 92 prelude. It runs and drives very good. The one problem I have with it is the wiring harness to the ecu. Whoever did the swap did something weird with the harness and if someone in the passenger seat kicks the harness on accodent it throws my car into limp mode only having the rpms at like 200 on warm idle. After messing with the harness for a while I got it back to 900rpms at warm idle. The problem is that my cel won't go away even after restarting the ecu and I don't seem to be getting as much power as i should especially when I am in v-tech. I have also noticed that if I am driving down the highway in 5th every once in a while my cel will go off my car will shudder a little then the cel goes back on. It is confusing me so if anyone has and advice/info for me it would be greatly appreciated. Thanks.

cjm81

Also my Air Fuel ratio is at 14.8 so my engine is still running good

kyden

so why haven't you pulled the code yet?

cjm81

Because it is an obd1 ecu and if I try to scan it it just comes up as no link.

doctorake

Use the link in the FAQs to jump the service connector to get the code.

cjm81

What exactly do you mean? Sorry I've never had to mess with an ecu before

doctorake

https://honda-tech.com/forums/honda-civic-del-sol-1992-2000-1/how-pull-cel-d4-srs-abs-codes-code-lists-1901557/

cjm81

O okay ill have to do that when I get home and see what happens. Thanks

cjm81

Okay sorry it took so long for me to reply again. It threw a code 10 and a 21 which are the intake air temp sensor and the v-tech air solenoid valve. Any ideas on how to fix those?