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03-18-2008, 06:40 PM
#4
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Re: First thing I'd check is the small brown ground wire to the throttle body.
i will check that and the timing is now correct and soon i will get a fuel pum prelay i hot wired it for tonights test start and the sprk was the issue
03-18-2008, 07:05 PM
#7
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When and if you decide to test the relay, its easy, just remove it and use a jumper wire between the 2 large terminals. The fuel pump will turn on, then try and start the car. Way back when I had the JT in my 4kq I went through alot of trouble before I tried this simple test.
Just trying to help you so you dont make the same mistake I did
It may not be the relay, but if you dont have spark at the plug this could be a solution.
Just trying to help you so you dont make the same mistake I did
It may not be the relay, but if you dont have spark at the plug this could be a solution.
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03-18-2008, 09:52 PM
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Re: Do you have 12V going to the terminal 15 (black wire) on the coil? Also, do you have 12V
i will re check but im sure both were reading bat. voltage or in this case what the battery charger was reading, but for right now since i dont have a good FP relay and temp. use paper clips i found the FP spades which one controls the spark, is it the little terminal?
03-19-2008, 05:16 AM
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Fuel Pump & Spark: Fuel pump relay looks for ign events to turn on...
Fuel pump looks for ign events to turn on.
Typically, pump runs for a second or so when you turn on the key, then stops. When you start cranking, fuel pump relay sees the ign pulses, then turns on again. So pump realy doesn't *control* ignition, but looks for ign pulses to turn on the pump. A safty thing.
Ign system is pretty simple:
Hall sender creates pulses, which are fed to the 'ignition controller' (inside the car, under the dash, but over the glovebox in a 4Kq).
The 'ignition controller module' takes the signal from teh hall sender, and drives the ignition coil (a 'power amplfier' for the hall signal, as it were..)
So.. Hall sender needs power, and coil needs to have power (and probably the controller too?)
Seems that of the three components, hall sender is the most likely to fail, followed by wiring faults.
Typically, pump runs for a second or so when you turn on the key, then stops. When you start cranking, fuel pump relay sees the ign pulses, then turns on again. So pump realy doesn't *control* ignition, but looks for ign pulses to turn on the pump. A safty thing.
Ign system is pretty simple:
Hall sender creates pulses, which are fed to the 'ignition controller' (inside the car, under the dash, but over the glovebox in a 4Kq).
The 'ignition controller module' takes the signal from teh hall sender, and drives the ignition coil (a 'power amplfier' for the hall signal, as it were..)
So.. Hall sender needs power, and coil needs to have power (and probably the controller too?)
Seems that of the three components, hall sender is the most likely to fail, followed by wiring faults.