I recently bought a 2000 accord . The engine had been blown && a local highschool rebuilt it.
The person I bought it from could get it to even start; && after a little looking I noticed the throttle cable wasnt hooked up . Lucky purchase .

When I finally did get it started at home, I found it had the surging idle ( 1000 - 3000 rmps ) in park . Even when I put it in N or D it counties the rough idling .
I change the whole throttle body because I thought it was my tps . Don't think that's the culprit .
I only know a little about cares; with very little knowledge of Hondas .

It's a 2.2 VTEC 2000 Honda Accord . Any help would be greatly appreciated .

 

You probably have a vacuum leak, meaning there is a hose that isn't connected and/or has a big hole in it. If that's it, it should be simple and most likely free to fix, but finding it may be tricky unless you can hear a whistling when the engine is running. The reason it jumps up and down is that it is trying to adjust the oxygen intake based on the O2 sensor after the engine, and the throttle is closing, but then too much, and then opening too much and causing the engine to surge up and down. Watch Scotty Kilmer's YouTube video "Finding engine vacuum leaks with a cigar" (I am not joking). Also watch his video "how to fix a car that idles poorly". The throttle body may just need a cheap cleaning ($5-10) with a can of Throttle Body Cleaner that you can get at any auto parts store.There are also a lot of good Honda specific videos on YouTube by NutzAboutBolts and Ericthecarguy

 

When I ran the codes I got p0113 code for IAT . Online says it would be on the bottom of the throttle body . I can't find it . Any help ?

 

From alldatadiy.comAir Temperature Sensor ( Ambient / Intake )
14. Left Rear Of L4 Engine





DTC P0113: IAT Sensor Circuit High Voltage

1. Turn the ignition switch ON (II).
2. Check the IAT with the scan tool.

Is -4 °F (-20 °C) or less (or L-Limit in Honda mode of PGM Tester), or 5 V indicated?

YES - Go to step 3.

NO - Intermittent failure, system is OK at this time. Check for poor connections or loose wires at the IAT sensor and the ECM/PCM.

1. Disconnect the IAT sensor connector.

1. Connect IAT sensor 2P connector terminals No.1 and No.2 with a jumper wire.
2. Check the IAT with the scan tool.

Is - 4 °F (- 20 °C) or less (or L-Limit in Honda mode of PGM Tester), or 5 V indicated?

YES - Go to step 6.

NO - Replace the IAT sensor.

1. Turn the ignition switch OFF.

1. Connect ECM/PCM connector terminals C18 and C25 with a jumper wire.
2. Turn the ignition switch ON (II).
3. Check the IAT with the scan tool.

Is -4 °F (-20 °C) or less (or L-Limit in Honda mode of PGM Tester), or 5 V indicated?

YES - Substitute a known-good ECM/PCM and recheck. If normal voltage is indicated, replace the original ECM/PCM.

NO - Repair open in the wire between the ECM/PCM (C18, C25) and the IAT sensor.