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Pgm relay triping not idleing normal - 1995 Honda Civic

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Check your carburetor, the valve may not be working properly when your engine is running

Posted on Sep 03, 2008

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I have a 1996 Acura 3.5 R.L. just put a new fuel pump in and it won't start. It turns over, but will not stay started.


Check your main fuel relay.



Fuel Supply System


PGM-FI Main Relay


Description


This PGM-FI main relay is located behind the dashboard


lower cover. The PGM-FI main relay actually contains


two individual relays. One relay is energized whenever


the ignition is on. It supplies battery voltage to the PCM,


power to the fuel injectors, and power for the second


relay. The second relay is energized for 2 seconds when


the ignition is switched on, and when the engine is running.


It supplies power to the fuel pump.


PGM-FI


MAIN RELAY



FUEL


PUMP


RELAY


Relay Testing


NOTE: If the engine starts and continues to run, the PGMFI


main relay is OK.


1. Remove the PGM-FI main relay.


2. Attach the battery positive terminal to the No. 3*


terminal and the battery negative terminal to the


No. 2* terminal of the PGM-FI main relay. Then


check for continuity between the No. 5* terminal and


No. 2 terminal of the PGM-FI main relay.


• If there is continuity, go on to step 3.


• If there is no continuity, replace the relay and


retest.



*: 8P CONNECTOR


To FUEL PUMP


3. Attach the battery positive terminal to the No. 4 terminal


and the battery negative terminal to the No.


7* terminal of the PGM-FI main relay. Then check


that there is continuity between the No. 3 terminal


and No. 1 terminal of the PGM-FI main relay.


• If there is continuity, go on to step 4.


• If there is no continuity, replace the relay and


retest.


4. Attach the battery positive terminal to the No. 1 terminal


and battery negative terminal to the No. 2*


terminal of the PGM-FI main relay. Then check that


there is continuity between the No. 5* terminal and


No. 2 terminal of the PGM-FI main relay.


• If there is continuity, the relay is OK;


If the fuel pump still does not work, go to Harness


Testing on the next page.


• If there is no continuity, replace the relay and


retest.



To PCM CONNECTOR


TERMINAL A4


To ST. SWITCH


To GROUND


To IGN. 1 To BAT


To PCM


CONNECTOR TERMINALS


A13 and B1


FUEL PUMP


RESISTOR


FUEL PUMP

Sep 18, 2013 | 1996 Acura TL Series

2 Answers

Show me a picture where the fuel pump relay is located on 1994 Acura Legend?


selectachapter.gif

Acura Coupes and Sedans 1994-2000 Repair Information

PGM-FI Main Relay

Print
This relay is located behind the dashboard's lower cover. It consists of two individual relays. One is energized whenever the ignition is ON , thus supplying battery voltage to the Powertrain Control Module (PCM). This relay also supplies voltage to the fuel injectors, and power to the second relay. The second relay is energized for two seconds, when the engine is turned ON , to power the fuel pump.
See Figure 1

0900c1528008be04.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Fig. 1: Schematic of the PGM-FI relay
Testing
If the engine starts and continues to run, the PGM-FI relay is working and does not need to be replaced.
See Figure 2

0900c1528008be05.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Fig. 2: PGM-FI relay terminal numbers

  1. Remove the relay.
  2. Apply battery voltage to the number three terminal.
  3. Ground the number two terminal.
  4. Check for continuity between terminals five and two.
  5. If continuity is detected, proceed to the step 7.
  6. If there is no continuity, replace the relay.
  7. Connect the number four terminal to the positive side of the battery.
  8. Ground the number two terminal of the relay.
  9. Check for continuity between the number five terminal and the number two terminal of the relay.
  10. If there is continuity, the relay checks out "OK". If the fuel pump still does not work, test the harness.
  11. If there is no continuity, replace the relay and retest.

Mar 11, 2013 | Cars & Trucks

1 Answer

Fuse for lighter


The fuse box does not list a fuse for the lighter. The Haynes manual says the "cigarette lighter relay" is located in left end of dashboard below pgm-fi relay. To help you understand where the PGM-FI relay is...see this link

http://www.tegger.com/hondafaq/mainrelay.html

Feb 11, 2012 | 1993 Honda Accord

1 Answer

I need the to know which fuse goes to What in my Honda fit 2008


PGM-FI main relay 1 (FI MAIN) is energized whenever the ignition switch is ON (II) to supply battery voltage to the ECM/PCM, power to the injectors, and power for PGM-FI main relay 2 (FUEL PUMP). PGM-FI main relay 2 (FUEL PUMP) is energized to supply power to the fuel pump for 2 seconds when the ignition switch is turned ON (II), and when the engine is cranking or running.

May 08, 2011 | 2009 Honda Fit

1 Answer

Car cranks but dose not start, there is no power to distributator or fuel pump


I suspect the at this point, the main relay is defective. This relay controls power to fuel and spark circuits.

The PGM-FI Main Relay is actually comprised of two individual internal relays. When the ignition switch is initially turned ON , the Powertrain Control Module (PCM) supplies ground to the PGM-FI Main Relay. This ground triggers one of the PGM-FI internal relays that sends battery voltage to the fuel pump for two seconds to pressurize the fuel system.
When the engine is running the PCM supplies a continuous ground to the PGM-FI Main Relay. The supplied ground keeps the relay in the "closed" position providing electrical current to the fuel pump, keeping the fuel loop pressurized while the engine runs.
If the engine is not running with the ignition on, the PCM cuts the ground to the PGM-FI Main Relay, causing the relay to "open" and stop the electric current flow to the fuel pump. As mentioned previously, if the engine is not running, the PCM will only supply ground to the PGM-FI Main Relay for two seconds when the ignition switch is initially switched to the ON position.
The PGM-FI Main Relay also supplies electrical power to the Idle Air Control (IAC) Valve and to the fuel injectors.

TESTING


If the engine starts and continues to run, the PGM-FI Main Relay is working and does not need to be replaced.
  1. Locate and remove the relay.

On some models of the Civic and Civic del Sol it is located to the left of the steering column under the dash. Many later models position it either near the passenger right side kick panel under the dash or by the driver left side kick panel up under the dash.
  1. Attach the battery positive terminal to the No. 2 terminal.
  2. And the battery negative terminal to the No. 1 terminal.
  3. Check for continuity between terminal No. 5 and 4.
  4. If there is no continuity, replace the relay and retest

Aug 05, 2010 | Honda Civic Cars & Trucks

1 Answer

1991 Honda Accord: When trying to start it turns, but doesn't start. Normally only when it is hot and humid (Thank you San Antonio), but when it's a nice cool evening or morning it starts right up. Ran it...


I would check 1) the fast idle thermo-valve. 2) the starting air valve, and 3) the IAC valve. The IAC valve and the Fast Idle valve are on the front of the cover that has PGM-FI on the top. They are connected at the bottoms by small water hoses. The starting air valve is at the right hand end (facing the car) of that cover. All of these valves affect you starting air mixture, in one way or another. They get dirty, or the vacumn hose to the starting valve make start leaking.
You will probably need a manual (Haynes) to go through checking procedures. It has good pics and describes what to do.
Hope this gets you started on a fix.

Oct 12, 2009 | Honda Accord Cars & Trucks

1 Answer

Cant start after short trip.


I have the same issue with my 94 Accord EX (but don’t have iPod plugged in). It seems that this could be the PGM-FI Main Relay and is very common to fail. It has a circuit board that is common to have cracks in the solder joints that will interrupt power to the fuel pump and/or fuel injectors (depending on model) & the engine will not start because they don't have 12 volts to operate. Also, the cars computer may give an error 16 (injectors bad) because it doesn’t read the injectors volts.
This main relay is located under the driver side dash above the cruise control unit. Lie on your back on the driver’s floor board; remove the cruise control unit [silver box about 8"X4"] above that on the driver side of the steering column will be the main relay.

You will only see the base of it and the plug with the big fat wires going into it (Grey box/Brown base) it says "Mitsuba RZ-00XX" on the side of it.

You can cheat at this point and instead of unbolting the entire relay housing, use a small screwdriver to pop the guts out of the housing.

Then replace with a new PGM-FI Main Relay or re-solder the joints and place back in the housing.
http://autorepair.about.com/od/enginetroubleshootin1/a/hon_mnrelay_tst.htm

Jun 21, 2009 | 1992 Honda Accord

2 Answers

Buzzing fuel pump


sounds like the fuel pump relay is stuck on. find the relay and replace it. hope this helps mike

Jun 16, 2009 | Acura TL Cars & Trucks

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