Question, I Put Fuel Rail Wrong Way On My Rb26

[Tai_Ter]

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]

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]

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

[zebra]

But with no fuel in the fail how can they?

[Tai_Ter]

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

[zebra]

Nope

Reg is on the return side

[Tai_Ter]

[Tai_Ter]

mechanic mate recons i definately have them the wrong way but could this mean i had it the right way?

[ARTZ]

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..

[Duncan]

you won't cause any damage hooking the lines around the wrong way (I'd know lol)

[Dahtone Racing]

you won't cause any damage hooking the lines around the wrong way (I'd know lol)

I think everyone's done it at some stage LOL

[ARTZ]

you won't cause any damage hooking the lines around the wrong way (I'd know lol)

I think everyone's done it at some stage LOL

yes but has fuel got past the reg when you did it?

[Dahtone Racing]

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.

[ARTZ]

But if fuel can't get past the reg how are the bores full of fuel?

I mean even if it did get past the reg how has it built up enough pressure to open the injectors.

[Dahtone Racing]

How does he know the bores are full of fuel?

He says he assumes they are full, it dent happen unless the injectors are wired to be constantly open.

[Tai_Ter]

Because fuel came out of the plugs holes overflowing and the sump was also full of fuel afterwards. This is a brand new rb26 i have never put the plugs in it.

[Tai_Ter]

The injectors were plugged in with cas disconnected i assume they are stuck open or receiving voltage

[Dahtone Racing]

Jeez, I've never seen that before.

[Tai_Ter]

So is it possible that if i have put the lines the right way and reg is on return side after fuel has reached the injectors that they can be forced open if say the reg is stuffed?

[msports180]

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?