s.khang

here is the problem:

i was driving down the freeway and all of a sudden my engine dies. i started to smell smoke, like rubber burning (i think something shorted) from underneath the dash behind the radio. i towed it home and came to the conclusion that it was cause by a bad fuel pump or main relay.

i turn the ignition to the "on" position and i don't hear the fuel pump turn on at all. so i did the test and jump the black/yellow and yellow/green wire for the main relay. i then turn the ignition to the "on" position and there is voltage going to the fuel pump and the fuel pump turns on.

so i thought it was a bad main relay. i bought a new one and it still does the same. the fuel pump will not turn on. the engine cranks but does not start.

anybody know the solution to the problem?


Modified by red92hatch at 5:36 AM 12/7/2003

cxSHOE

your coil ? 75 bucks at kragen. or worse your ignitor $100+

s.khang

but before i do that, i want to get my fuel pump to turned on. cuz if there is no fuel, the engine wont start.

quik1

If your getting voltage to the pump and its not turning on it sounds to me like your fuel pump has died. Double check the voltage and check that the ground is good.

Jimmy

iTrader: (5)

What a situation...
I was on a rode trip on cruise control going 70 mph and all of a sudden my car lost accelration i looked back and seen smoke and i tried to give it gas and the engine had died..i pull over and get in the e-lane and my car was doing the same thing (engine:d16z6) and just so happen my friend had an extra ignitor and put it in....started right up

s.khang

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by quik1 &raquo;</TD></TR><TR><TD CLASS="quote">If your getting voltage to the pump and its not turning on it sounds to me like your fuel pump has died. Double check the voltage and check that the ground is good.</TD></TR></TABLE>

the fuel pump turns on when i jump the wires. when i connect the new main relay there is no voltage, thus the fuel pump does not turn on.


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by USDMDC2 &raquo;</TD></TR><TR><TD CLASS="quote">my car was doing the same thing (engine:d16z6) and just so happen my friend had an extra ignitor and put it in....started right up </TD></TR></TABLE>

but before i check for spark and ignition, shouldn't i check for why the fuel pump isn't turning on?


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1993sir &raquo;</TD></TR><TR><TD CLASS="quote">yeah but without spark your car wont start either?</TD></TR></TABLE>

but will no spark = no fuel pump?

elp

s.khang

anybody else with suggestions to what might solve this dilema?

BLK JDM

Kinda the same dilema w/ me, but twice w/ 2 different cars. Check your ECU fuses. My car died on the highway and that was the problem. 2 fuses for the ECU had blown out b/c of a main relay short.(D16Z6)

If that's not the problem check your ECU. It could have gotten fried.(B20B swapped CX hatch w/ LS ECU)

s.khang

i checked all fuses and they are all fine. haven't check the ecu physically, but how would i go about doing that?

BLK JDM

Try to plug the ECU into another car of the same make or same swap and see if it turns on. Or borrow another ECU from a friend and check it on your car.

The ECU is on the passenger side footwell, closest to the door, under the carpet.

s.khang

damn, its been a week and i cant find anybody with a p06 ecu.

but in the meantime, if the ecu is fried/broken, will it cause the fuel pump to not turn on as well?

ProdriveWRC

When you turn your ignition on, the fuel pump will only come on for a couple seconds then switch off. So if your by yourself and switch the key on then walk back to check fuel pump voltage, you might not get any because it may have switched off already. Get a friend to turn the ignition on while your standing over the fuel pump with a meter checking for voltage. You should get 13+ volts for a few seconds then it will go off.

If there is no voltage at all, then you need to check the relay next. Any shop manual will show you the proceadure for checking a relay. You could probably find the proceadure online too with a search. If the realy checks out fine, be sure to check one more thing on it. Take off the plastic cover on the realy and take a close look at the solder joints. They have a tendency to form fine cracks in the solder. Look very close because they are hard to spot sometimes. If you find cracks, simply take a soldering iron to the solder to melt it and that will get rid of the cracks.

If the relay checks out fine and there are no cracks, then it might be the ECU. The ECU will send voltage to the relay for a few seconds when the ignition is turned on. You will need a wiring diagram. Find out which wires on the relay plug are the ECU signal and ground. There should be voltage there for a few seconds after the ignition is turned on. If you have no voltage there, then the problem is from teh ECU. Now ECUs don't normally go bad, but connections usually do. So check for wires partially pulled out of the ECU connector. Take the plug out of the ECU and check for corrosion on the terminals. Plug everything back together and recheck you voltages. If you still arent getting voltage from the ECU, then I would say that it's bad. Keep in mind that the ECU is LEAST likely to be the problem so only cosider replacing it after al other options have been ruled out. Good luck.

Alin

s.khang

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ProdriveWRC &raquo;</TD></TR><TR><TD CLASS="quote">When you turn your ignition on, the fuel pump will only come on for a couple seconds then switch off. So if your by yourself and switch the key on then walk back to check fuel pump voltage, you might not get any because it may have switched off already. Get a friend to turn the ignition on while your standing over the fuel pump with a meter checking for voltage. You should get 13+ volts for a few seconds then it will go off.</TD></TR></TABLE>

actually, you can hear the fuel pump turn on from the driver's seat. which i always hear, until this inccident. the fuel pump would only come on and stay on when i jump the wires connecting to the relay.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ProdriveWRC &raquo;</TD></TR><TR><TD CLASS="quote">
If there is no voltage at all, then you need to check the relay next. Any shop manual will show you the proceadure for checking a relay. You could probably find the proceadure online too with a search. If the realy checks out fine, be sure to check one more thing on it. Take off the plastic cover on the realy and take a close look at the solder joints. They have a tendency to form fine cracks in the solder. Look very close because they are hard to spot sometimes. If you find cracks, simply take a soldering iron to the solder to melt it and that will get rid of the cracks.</TD></TR></TABLE>

checked and there is voltage going to the fuel pump when i jump the wires connecting to the relay. when the relay is connected, there is no voltage. so, my assumption was a bad relay, which i resoldered my old one like you said. still didn't solve the issue. bought a new one from Honda, plug it in and still didn't solve the issue.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ProdriveWRC &raquo;</TD></TR><TR><TD CLASS="quote">
If the relay checks out fine and there are no cracks, then it might be the ECU. The ECU will send voltage to the relay for a few seconds when the ignition is turned on. You will need a wiring diagram. Find out which wires on the relay plug are the ECU signal and ground. There should be voltage there for a few seconds after the ignition is turned on. If you have no voltage there, then the problem is from teh ECU. Now ECUs don't normally go bad, but connections usually do. So check for wires partially pulled out of the ECU connector. Take the plug out of the ECU and check for corrosion on the terminals. Plug everything back together and recheck you voltages. If you still arent getting voltage from the ECU, then I would say that it's bad. Keep in mind that the ECU is LEAST likely to be the problem so only cosider replacing it after al other options have been ruled out. Good luck.

Alin</TD></TR></TABLE>

thanks Alin, i checked and rechecked a lot of things but i wasnt sure if the ECU sent voltage to the relay. ill check the ECU harness and the wires. thanks.

tgreaves

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by red92hatch &raquo;</TD></TR><TR><TD CLASS="quote">anybody else with suggestions to what might solve this dilema? </TD></TR></TABLE>

Look inside of the main relay, There are numbers in there.. Short pins 1 and 7 together with a piece of wire or something.. If the fuel pump turns on its not the fuel pump.. If that works short pins 1, 3, and 7 together and try to start the car..
Just to clarify,

Pins----
1 - 12 volts from battery
3 - 12 volts ignition signal to ecu
7 - 12 volts power to fuel pump

Also check out
http://pgmfi.org/resources/doc...9.pdf

intezn

i am having similar problem

most of the times my car, b18b w/ around 90k in 92 si w/ 180k, would start right up, and just sometimes it wouldn't

it would start up and die right away, and then i turn it off, and on again, i didn't hear the fuel pump sound.

any ideas of what could be wrong?

it would start back up if i let it sit for a minute of 2 and then try again.

s.khang

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tgreaves &raquo;</TD></TR><TR><TD CLASS="quote">

Look inside of the main relay, There are numbers in there.. Short pins 1 and 7 together with a piece of wire or something.. If the fuel pump turns on its not the fuel pump.. If that works short pins 1, 3, and 7 together and try to start the car..
Just to clarify,

Pins----
1 - 12 volts from battery
3 - 12 volts ignition signal to ecu
7 - 12 volts power to fuel pump

Also check out
http://pgmfi.org/resources/doc...9.pdf

</TD></TR></TABLE>

thanks for your help. i think i found the problem...







i think i can resolder it