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I Think My Injectors Are Cooked After It Got Cleaned

Dose Pipe Sutututu
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Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

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One day (3 days ago) I decided that I needed to do an injector service, fair enough.. I dismantled the plenum, then fuel rail, then took off the injectors.... pretty straight forward right?

Took it down to a spare parts place to get them cleaned & flow tested... the guy told me your injectors were pretty dirty before and now are all good...

Took them home this afternoon, and then whacked everything back together and to my surprise, the car won't start....

Firstly...........I can breifly hear the fuel pump, pump then stop as in the fuel has no where to go... This never happened before...

Secondly.......My fuel filter popped off because of so much pressure...

This lead me to think that maybe the ECU was farked, so I poured petrol straight into the throttle body and the car started for a split second... so car still starts... narrowed it down to a fuel problem..

I have no idea, it's 11pm now and I'm so lost..... Help needed!!!! I checked all the injector wiring, its all in... I can't htink of anything else...

GTR1993 Mentor

GTR1993

Posted
Posted (edited)

When you goto the last click on the key barrel, before the starter signal the fuel pump will run and then stop, the fuel pump primes, but as the motor is not spinning the computer shuts the pump off. This is so the pump doesnt keep running if the motor stalls or you have an accident etc. So this is normal.

Next thing is the injectors firing or not doesnt change the fuel pressure top pop the filter off, the fuel is held "back" by the fuel pressure regulator on the end of the fuel rail, when a certain pressure is reached it lets the excess fuel back into the fuel tank.

Are these top feed or side feed? If side feed you can removed the rail from the manifold while leaving the fuel lines connected, and carefully get someone to crank the motor and see if the injectors fire, be sure to have rags everywhere as you dont want fuel going everywhere.

edit i see your sig says rb20, so they are top feed, so you cant just take the rail off. I think you can use a test light, touch each terminal in the injector plug and you should see if it turns on for a split second, i havent tried this my self so im not sure if they are open long enough to actually see the light go on.

Edited by GTR1993
Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

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There side feed..... RB20DET

And before my fuel pump would keep on running regardless, it wouldn't halt.. The previous owner didn't wire the fuel pump to the ECU, its wireless into the ignition... I'm going to change that soon when i got time......

I got the car in a mess.. been fixing it slowly....

It's so weird....

GTR1993 Mentor

GTR1993

Posted
Posted (edited)

Oh i thought rb20 was top feed thats why 26 injectors are an upgrade? Im not sure i dont own a RB20, just a 26.

Regardless how it is wired up it still shouldnt turn off. I think that could be the problem.. Are u sure u havent put the fuel lines on in reverse, then there would be no pressure in the rail, but then wouldnt explaine why the fuel filter would pop off etc...actually yes it would pop it off, there backwards

Edited by GTR1993
Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

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  GTR1993 said:
Oh i thought rb20 was top feed thats why 26 injectors are an upgrade? Im not sure i dont own a RB20, just a 26.

Regardless how it is wired up it still shouldnt turn off. I think that could be the problem.. Are u sure u havent put the fuel lines on in reverse, then there would be no pressure in the rail, but then wouldnt explaine why the fuel filter would pop off etc...

Well that could be a problem? but I don't think so.. because the fuel filter is connected to the fuel pressure regulator.. so thats right...

Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

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IT WORKS.... Damn I'm stupid sometimes....

For some reason I thought the sequence goes like:

Fuel Line --> Fuel Filter --> Fuel Regulator

never knew it was the other way around...

Cheers guys, thanks for you input......!!!!

iced Apprentice

iced

Posted
Posted
  johnnilicte said:
IT WORKS.... Damn I'm stupid sometimes....

For some reason I thought the sequence goes like:

Fuel Line --> Fuel Filter --> Fuel Regulator

never knew it was the other way around...

Cheers guys, thanks for you input......!!!!

haha

you were spewing brother

owned

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