P0171, P0170. Love data readings
#1
P0171, P0170. Love data readings
Hey HT, I have a 2000 Integra get with sri,ebay 4-1 header, itr cat and ebay catback exhaust. Problem is I'm having a heck of a time diagnosing the issue. When I start the car it immediately Gos to 1000 rpm then slowly rises up to 1500 rpm, it runs a little rough at idle, it feels down in power and it won't rev past 7000 rpm (yes it's fully warmed up and vtec works fine). I already checked fuel pressure which was actually very good, my vacuum pressure at idle is pretty firm at -21inhg, I've replaced both o2 sensors with oem sensors, I replaced the injectors and fuel filter. I replaced my header because my last one had cracks. I also replaced fpr and ecu. So here's the thing whoever had the car before me extended the tps connector, they also solderd the wires to the fuel pump connector (it looks ugly but there all connected well. Main relay has been replaced also. My short term fuel trim at idle is between +27 and +30 while long term fuel trim is roughly +20. Weird thing is my map sensor is reading roughly 4 psi which seems pretty low to me. Every now and then I get a p0420 code as well.If anyone has any ideas or has had the same problem PLEASE post. Thanks everyone.
Last edited by adk133; 04-20-2017 at 06:54 AM. Reason: Adding relevant information
#2
Honda-Tech Member
Re: P0171, P0170. Love data readings
Maybe tps and map is switched and or has a short in the tps wiring they re did. check thermostat ground as well. The code is for the cat, check for exhaust leaks around the header collector and cat. and make sure your o2 sensors are connected to the right plug one should be under the car hanging down and one coming off the engine harness above the header collector area. Other wise try another cat!
#3
Re: P0171, P0170. Love data readings
Maybe tps and map is switched and or has a short in the tps wiring they re did. check thermostat ground as well. The code is for the cat, check for exhaust leaks around the header collector and cat. and make sure your o2 sensors are connected to the right plug one should be under the car hanging down and one coming off the engine harness above the header collector area. Other wise try another cat!
#4
Honda-Tech Member
Re: P0171, P0170. Love data readings
definitely fix those minor ex leaks those could very well be your issue then reset the ecu, unplug it or the negative battery for a few mind the check engine light should disappear unless you have a scanner just erase the codes and go from there, I got one for $30 at harbor freight comes in handy I tell ya. if the problem still exist look into removing the cat for a good one. There is used ones you can find for a good deal if you search around.
#6
Re: P0171, P0170. Love data readings
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