alcidespn

Hello Good morning, does anyone know where the problem is when there is no negative pulse in the injectors to inject fuel?
There is spark in the spark plug, the fuel pump launches fuel to the engine, and main relay does not arrive the negative signal coming from the ECU.
I've already replaced the ignition module inside the distributor. engine rotates but does not handle. If gasoline is placed, lubricate spray on the throttle, the engine picks up. I already suspected that it could be cleaning the nozzles, I cleaned them and it's still the same, that is, it was not the nozzles.

Someone has the schematic diagram of the ECU. is a p28-a51 ??. the car model is from DELSOL si vtec 93, d16z6 automatic engine.

thank you

mk378

It is very hard to see injector pulses on a voltmeter. Use a "noid light" test instead.

If the ECU really is firing sparks but not driving the injectors, it could be because it thinks the throttle is wide open due to a TPS problem. Or the ECU could be bad.

alcidespn

Thank you mK378 ,


What is noid light? How to test the tps? I will also check if the wires that go main relay to the ECU, from the sensors: rpm, wires: blue / green-7 to B16, and blue / yellow 3 to B15, valve control position: wires: orange 5 to B11, and white 1 to B12, blue / orange crank sensor 6 to B13, and blue / white 2 to B14.Who are inside the distributor, are in order. Passing energy.
and get someone you know and know how to tweak the ECU obd 1. I already went through doise when looking at ecu, saw that it is obd1, do not know! There is no schematic or device.
Some body have this schematic of this ECU ?

Ty
obrigado

mk378

Take a #194 bulb and bend the wire pins down so they point straight away from the glass. Unplug a fuel injector and push the bulb pins into the injector socket. Crank the engine and watch if the bulb flashes.

You can of course buy a more sophisticated version of that rig, it is called a noid light.

The three distributor sensors are simply reluctor coils. They can be tested for ohms (should be about 300) and faults to ground (should be open). You can do this either by unplugging the distributor or measure all the way from the ECU end with the ECU unplugged.

alcidespn

Ok I'll get you a lamp and do as you told me, thank you. I'm going to test the sensors too, it's easier and cheaper than fixing the ECU. I need to get my car to pick up, just run the engine but it will not pick up, just putting gasoline in the butterfly.

thank you

to the next.

tony_2018

you probably flooded the cylinder

alcidespn

Hello my friends,

minha ECU esta realmente com defeito, não envia pulsos, nao envia sinal para ativar a bomba de combustivel. Vou comprar outro modulo! Estou a procura tambem de quem conserta este modulo, o mais barato!, isto se alguem souber como conserta-lo. souber o esquema eletrico deste modulo,37820-p28-a51 !! será que serve um ...-a52? qual a diferença entre um e outro?
my ECU is really defective, it does not send pulses, it does not send a signal to activate the fuel pump. I'll buy another module! I'm looking for someone who repairs this module, the cheapest! If someone knows how to fix it. know the electrical scheme of this module, 37820-p28-a51 !! will it serve a ...- a52? What is the difference between the two?

thank you !!