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Question, I Put Fuel Rail Wrong Way On My Rb26

Tai_Ter

By Tai_Ter,
in Engines & Forced Induction

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Tai_Ter Enthusiast

Tai_Ter

Posted
Posted

Hi,

I feel very stupid as heading states I hooked up fuel lines wrong way round. Just put my rb26 in my car and connected them up not thinking just so fuel didnt drip everywhere and to get them out of the way.

I hooked up wiring and fuel pump and starter, I just wanted to turn it over after rebuild, turned key to accessory and fuel pump started. meanwhile i could hear a strange pressure building noise and quickly switched it off.

very soon after i realised that fuel pressure had built and obviously couldnt get past the fuel reg and fuel passed through the injectors into the cylinders.

Q 1. are my injectors going to be okay after that sort of abuse.?

Q 2. is my fuel reg going to be okay?

Q 3. will this effect run in and the hone job on the bores or the rings themselves? (Fuel was pushed out of cylindars within half an hour.)

Q 4. Will I not know any of the above until I test each thing.

Thanks

Taylor.

ARTZ Grand Master

ARTZ

Posted
Posted

I don't understand, I hooked mine up the wrong way as well once and fuel just didn't get past the reg, so how has it got into your cylinders ?

fuel shouldn't get past the reg the wrong way and pump should turn off once pressurized

Tai_Ter Enthusiast

Tai_Ter

Posted
  • Author
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I assume it pressurised the injectors so much they leaked out the tip. fuel got into the cylinders through the injector tip. fuel pump didnt switch off once pressurised it just kept pumping and filled the cylinders in seconds

Tai_Ter Enthusiast

Tai_Ter

Posted
  • Author
Posted

on an rb26 the rails pressure reg is on the front of the rail itself before the injectors. the lines were reversed so the fuel went to all of the injectors first and stopped at the reg at the end and i assume couldnt get past the reg

ARTZ Grand Master

ARTZ

Posted
Posted

Reg is definitely on return side cause it needs to regulate pressure in the rail..

so sounds like it is hooked up the right way..

So either your pump isn't switching itself off once pressurized, have your rewired it lately?

Or your injectors are stuck open for some reason..

maybe your injectors are getting voltage I dont know why this would happen

I had 90psi fuel pressure on mine and it wasn't enough to push injectors open, then again my pump would switch off..

Dahtone Racing Grand Master

Dahtone Racing

Posted
Posted

Fuel can't get past the reg and even if it does you won't have much pressure in the rail because there is nothing to stop it running back to the tank.

The reg restricts flow back to the thank to increase pressure in the rail.

Your injectors, reg and engine will be fine.

If you're really scared and want to be sure pull the spark plugs out and crank the engine over with the cam angle sensor disconnected to clear out any fuel in the bores.

msports180 Mentor

msports180

Posted
Posted

Id say more then getting the line's the wrong way you have leaking injector seals? Or the reg jammed shut over pressurising the rail causing fuel to leak past the injectors?

Everything would now have been washed of any oil on its surface. Id drain everything, leak everything open for a few days to let any fuel evaporate out then refill with oil, then crank it by hand for a while?

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