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Thread: 18RGEU Wiring Woes (56K BWARE) *It was alive NOW DEAD*

  1. #91
    My Missus is a Domestic Engineer BradW's Avatar
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    Default Re: 18RGEU Wiring Woes (56K BWARE) Update on page 5!

    Fill in the relay pinouts below so we can work out where you went wrong.


    EFI Main relay
    Pin 86 goes to
    Pin 85 goes to
    Pin 30 goes to
    Pin 87 goes to
    Brad

    Old Corollas never die...

    My KE30
    Updated 15/7/2007............ yes, I need to pull my finger out.

  2. #92
    Junior Member Automotive Encyclopaedia Spectre's Avatar
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    Default Re: 18RGEU Wiring Woes (56K BWARE) Update on page 5!

    87 - battery
    85 - +coil
    86 - earth
    30 - +coil



    essential this

  3. #93
    My Missus is a Domestic Engineer BradW's Avatar
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    Default Re: 18RGEU Wiring Woes (56K BWARE) Update on page 5!

    Quote Originally Posted by Spectre
    87 - battery
    85 - +coil
    86 - earth
    30 - +coil

    essential this
    There is your problem. You are switching the relay on with the ignition switch and holding it on with the power coming out of the relay (pin 30).
    Find out which wire on the coil+ is coming from the ignition switch. Take this wire off the coil+ and put it straight to the 85 pin of your main relay. Leave the wire from pin 30 to coil+ in place.
    Brad

    Old Corollas never die...

    My KE30
    Updated 15/7/2007............ yes, I need to pull my finger out.

  4. #94
    Junior Member Too Much Toyota
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    Default Re: 18RGEU Wiring Woes (56K BWARE) Update on page 5!

    can i also suggest you use a relay (wired the same way asthe main EFI relay) to control power to the injectors - you only need to power them up when the key is at the IGN or start position.

    The easiest way to do this is to use the the output of pin 30 on the main relay to also switch another relay controlling power to the injectors.
    ------------------------------
    ST185 road barge / MZ11 forest barge / RA65 garage barge

  5. #95
    Junior Member Automotive Encyclopaedia Spectre's Avatar
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    Default Re: 18RGEU Wiring Woes (56K BWARE) Update on page 5!

    Quote Originally Posted by thechuckster
    can i also suggest you use a relay (wired the same way asthe main EFI relay) to control power to the injectors - you only need to power them up when the key is at the IGN or start position.

    The easiest way to do this is to use the the output of pin 30 on the main relay to also switch another relay controlling power to the injectors.
    Ive wired the injectors (which are fed via the ballast resistor) to the + side of the coil, as someone else said that they dont need to run straight from the battery.

  6. #96
    Junior Member Automotive Encyclopaedia Spectre's Avatar
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    Default Re: 18RGEU Wiring Woes (56K BWARE) Update on page 5!

    Problem fixed! Thanks everyone that helped out, +rep for you!

    Just took the ignition wire off the coil, and ran it straight to the main relay.

  7. #97
    Junior Member Automotive Encyclopaedia Spectre's Avatar
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    Default Re: 18RGEU Wiring Woes (56K BWARE) Its Alive! Video Page 5

    http://video.google.com.au/videoplay...35561&hl=en-AU

    Video of the car running with no exhaust. Just got the alternator to wire up and then its off for an exhaust.

  8. #98
    Junior Member Automotive Encyclopaedia Spectre's Avatar
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    Default Re: 18RGEU Wiring Woes (56K BWARE) *It was alive NOW DEAD*

    Ok after getting it back from the exhaust shop, replacing the dizzy cap, spark plugs and leads, then finding it also had a blown headgasket (which is now fixed, and everything back together). It wont start!

    First I found the fuel pump had died, so I swapped in a spare I had. Still dead.

    Found battery was stuffed, got a new one, almost started but still dead.

    Finding that when I push the flap of the AFM, the fuel pumps don't come on line they should when the key is in the "ON" possition.

    Checked all my wiring back to the ECU and Relays - all fine. (also checked fuses they were fine).

    I recon that the AFM might have had it. Is there a way to test this before I go and get another one. Ive got a muli-metre

    Cheers,

    Bryce

  9. #99
    Junior Member Carport Converter RA35GT's Avatar
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    Default Re: 18RGEU Wiring Woes (56K BWARE) *It was alive NOW DEAD*

    Hotwire the fuel pump (so its on constantly) and see if the engine starts/runs. (Don't leave it in this condition).

    If it does then you know there is something iffy with the AFM.

    You have two options then, if the AFM otherwise works and drives normally etc. you can get a tachometric relay to control the fuel pump instead.

    The other option of course is to get another afm...

    Rudi
    1977 RA35 Celica GT - I4 | 2007 GSV40R Aurion - V6
    Don't live life being scared of death, live in the fear of not truly living. RP 2012

  10. #100
    Junior Member Automotive Encyclopaedia Spectre's Avatar
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    Default Re: 18RGEU Wiring Woes (56K BWARE) *It was alive NOW DEAD*

    Quote Originally Posted by 7M-GTE MX73
    Hotwire the fuel pump (so its on constantly) and see if the engine starts/runs. (Don't leave it in this condition).

    If it does then you know there is something iffy with the AFM.

    You have two options then, if the AFM otherwise works and drives normally etc. you can get a tachometric relay to control the fuel pump instead.

    The other option of course is to get another afm...

    Rudi
    Did this just after I posted Run the fuel pump off a spare battery so that it was constantly running.

    It would cough and splutter and seem like its trying to start, but wont stay on. Is the AFM only job to control the fuel pumps?

  11. #101
    Backyard Engineer Domestic Engineer airfireman1's Avatar
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    Default Re: 18RGEU Wiring Woes (56K BWARE) *It was alive NOW DEAD*

    I can lend you a AFM and computer if you want to do some swapping to eliminate them
    Cheers Dave


    1977 RA28
    1972 TA22
    1984 Supra

  12. #102
    Junior Member Automotive Encyclopaedia Spectre's Avatar
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    Default Re: 18RGEU Wiring Woes (56K BWARE) *It was alive NOW DEAD*

    Quote Originally Posted by airfireman1
    I can lend you a AFM and computer if you want to do some swapping to eliminate them
    PM Sent! 10char

  13. #103
    Junior Member Carport Converter RA35GT's Avatar
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    Default Re: 18RGEU Wiring Woes (56K BWARE) *It was alive NOW DEAD*

    The AFM is the main load sensor to the ECU. It tells the computer the amount of air so the ECU can inject the right amount of fuel. (Controlling the fuel pump is only a secondary system in this case).

    You don't have something simple like an air leak after the afm do you ?

    Can you hear the injectors clicking? Plugs wet?

    Strong spark?
    1977 RA35 Celica GT - I4 | 2007 GSV40R Aurion - V6
    Don't live life being scared of death, live in the fear of not truly living. RP 2012

  14. #104
    Junior Member Automotive Encyclopaedia Spectre's Avatar
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    Default Re: 18RGEU Wiring Woes (56K BWARE) *It was alive NOW DEAD*

    It's not the afm or the ecu, just checked with fireman's.

    I actually think the plug to my ecu might have been a bit loose, as after i pluged it back in, the pumps come on when the AFM is opened.

    It will cough and splutter then die (like theres not enough fuel). And it backfired through the throttlebody once.

    Once or twice I heard a weezing sound like air escaping somewhere.

    the injectors leak a little bit of fuel when i move them.

    Bryce

  15. #105
    Junior Member Carport Converter RA35GT's Avatar
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    Default Re: 18RGEU Wiring Woes (56K BWARE) *It was alive NOW DEAD*

    The fuel pump control of the AFM doesnt connect to the ECU, its more likely that the plug on the AFM was a little dodgy?

    Are you sure the cam timing is correct? (and the spark timing? And dizzy leads?)

    If the injectors are leaking you should fix them also, could be rather dangerous depending where its leaking from/to.

    Rudi
    1977 RA35 Celica GT - I4 | 2007 GSV40R Aurion - V6
    Don't live life being scared of death, live in the fear of not truly living. RP 2012

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