Joshbarry

Hey everyone,
I am new to this forum and joined because I need some help. A few months ago I purchased a 2000 Honda Civic EX 4Spd Automatic off of craigslist and it has not stopped giving me problems. Currently I have two trouble codes: P0113 IAT sensor circuit high voltage, and P0172 Fuel system too rich bank 1. Also, the car idles very rough and very low and will stall out at unless I put it in neutral and rev the engine coming up to a stop.


So far I have replaced the following parts:

Primary O2 Sensor

IAT Sensor

Water pump

Spark plugs/wires

Distributor cap/rotor button

I have also recently cleaned out the throttlebody and ran a bottle of fuel injector cleaner through the engine.


Im stumped. Thanks in advance for any help.

Josh

Former User

Does the 2P connector plugged into the IAT sensor have a Red/Yel wire and Grn/Blk wire? If so, check both wires, which run from the IAT connector to ECU C18 and C25) for a short or open.

P0172 - check whether the FPR is stuck closed or a fuel injector is stuck open.

Joshbarry

Sorry to take so long to reply.

I checked the wires with an Ohm Meter yesterday and they had very little resistance. Is this a good sign? Is there a better way to check for shorts?

I checked the fuel injectors, and they all were fine. Haynes doesn't say how to check the FPR. Any suggestions?

Also, as far as the idle/stalling goes, could I possibly need a new PCV Valve? Would that cause these symptoms? Also, the IACV is not in the place it should be. I think instead it is mounted on the bottom of the throttle body but I have read that that is a FIT not and IAC. Is it possible I dont have an IACV and that is what is causing the problem?

Josh