Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Accidental Transmission discovery (bump started my automatic)

RH77 · 03-09-2008, 05:37 AM

This is the best I can come up with from the shop manual...

This is on the '98 Honda/Acura 1.8L base Integra engine (B18b1)

The PGM-FI system regulates idle based on:
Overview

Sensor Inputs
Control Module Program (the brains)
Result/Output (sensor or device)

Process
Sensor Inputs Relevant:

Vehicle Speed Sensor
Alternator Charge Signal
Primary Heated O2 Sensor
Transmission Gear Position Sensor
Batt Voltage
Fuel Tank Pressure Sensor

These and others are fed into the ECM. The "Electronic Idle Control" program is part of the computer, and likely outputs to:

Alternator Output Control
Idle Air Control Valve
Ignition Control Module
Fuel Pump

Hope this helps.

RH77

What it doesn't really get into is the following observation:

Lots of cars I drive will increase engine speed based on brake vacuum at idle. With the vehicle stopped and in P or N, pump the brakes quickly and note if idle increases.

03-09-2008, 05:37 AM	#21 (permalink)
RH77 Depends on the Day Join Date: Nov 2007 Location: Kansas City Area Posts: 1,761 Teggy - '98 Acura Integra LS Sports Cars 90 day: 32.74 mpg (US) IMA - '10 Honda Insight EX Team Honda 90 day: 34.76 mpg (US) Tessie - '06 Acura TSX Base 90 day: 28.2 mpg (US) Thanks: 31 Thanked 41 Times in 35 Posts	Interp This is the best I can come up with from the shop manual... This is on the '98 Honda/Acura 1.8L base Integra engine (B18b1) The PGM-FI system regulates idle based on: Overview Sensor Inputs Control Module Program (the brains) Result/Output (sensor or device) Process Sensor Inputs Relevant: Vehicle Speed Sensor Alternator Charge Signal Primary Heated O2 Sensor Transmission Gear Position Sensor Batt Voltage Fuel Tank Pressure Sensor These and others are fed into the ECM. The "Electronic Idle Control" program is part of the computer, and likely outputs to: Alternator Output Control Idle Air Control Valve Ignition Control Module Fuel Pump Hope this helps. RH77 What it doesn't really get into is the following observation: Lots of cars I drive will increase engine speed based on brake vacuum at idle. With the vehicle stopped and in P or N, pump the brakes quickly and note if idle increases. __________________ *“If we knew what we were doing, it wouldn't be called research” ― Albert Einstein* _ _ Last edited by RH77; 03-09-2008 at 05:42 AM.. Reason: more stuff