bleeding my new fuel injectors and leads

Hey,

Basically I changed all my injector hoses yesterday, they seem ok, no leaks or anything.

However, my car won't start, I'm very confident there is air in the new leads.

I just cant find anything on how to deal with this.
 
some people said it should get sucked through and essentialy bleed its self, and some said I need to loosen the new leads to let the pressure out.

Im not sure what to do really and I was just wondering if anyone actually has an answer for this.

I can confirm the car was working prior to the new hoses being installed,

Engine code DX Mk1 Golf Gti

Kind regards,

Bill. 

Bump !

Remove fuel pump relay, bridge the 2 fusebox connectors that the two big copper relay contacts fitted into.

Remove injectors and place in a container to catch petrol, remove rubber boot on meterhead, lift air plate, turn ign key to start position. Air and then petrol should squirt out of injectors.

Why did you replace the injector lines if they were OK??

 

thanks for replying!

when I got the car it was a barn find with no service history, so I have no idea how old any of the parts on the car are.

it has a very slight misfire and was also requiring a very high air-fuel mixture to run normally. I think some of the injector seals where just worn out and maybe one of the injectors has gone bad.

and I'm currently chipping away at basically replacing all of the parts related to fueling so that I can narrow down and fix this issue while at the same time just replacing tired old parts, as the car is 35 years old and most of the parts on it are original.

I took all the hoses off and turned over the engine over and there was petrol coming through them. I'm just wondering that maybe I had a special moment and didn't connect the hoses in the correct order on the metering head, so I'm just trying to find a diagram so I can double check that.

again thanks for the response I will try and see if that works.

kind regards,

Bill










 

Its Konstant fuel injection, hence K-Jet. They all spray all the time, unlike Diesel or more recent sequential petrol FI, so you can connect them in any order.

After 30 years the injectors would prob be past their best, the old lines prob just needed flushing out/blow out with clean petrol and an airline, if that. And they would be bent into shape after 30 years so that they would only go back one way.

 

alright ok thanks, it must just be air in the system then. Thanks for the advice I'll let you know if I sort it !

kind regards,

Bill

I fitted new tank, pump, filter and nearly every other fuel injection component last year on my 1.8GTI and I don't ever remember having to bleed it at all. If you have fuel at the injectors but not coming through them I would say that your injectors are definitely had it. I replaced all four on mine and got them from eBay, they have been on the car a year now and it runs fine. I also had to replace my metering head as it had unequal quantities of fuel being delivered to each cylinder.
Link here to the ones I bought:
http://www.ebay.co.uk/itm/VW-GOLF-MK1-CABRIOLET-SCIROCCO-STORM-FUEL-INJECTOR-VALVE-BOSCH-049133551A-A888-/191630779767?fits=Model%3AGolf&hash=item2c9e15a577:g:PYEAAOSwDNdVo8rn
Good luck, I hope you get it sorted.

thanks for the response!

The strange thing is, is that the car was running "ok" before I changed the hoses and injector seals, it just was running rich and had a very slight miss fire.

So I'm a bit puzzled as to why it won't start now. I inspected the injectors and at least some of them need to be changed but they did still work before changing the seals and hoses. I have just purchased a new set of injectors because it needs them regardless, however, I'm really scratching my head as to why just changing the injector seals and hoses has caused it to not start.

I'm going to go through and make sure everything was done properly tomorrow after work, just to double check I haven't done anything stupid.

If I can't remedy the problem with new injectors and a proper inspection to make sure I did everything alright my next port of call will be the metering head.

Just seems odd that just merely changing the injector seals and hoses has stopped it from starting aha.

thanks for the advice it's really appreciated.

Kind regards,

Bill.







 

Hello everyone,

Just so everyone has solace on this topic, I fixed the issue.

It resulted in being a combination of old/tired fuel injectors and an old/tired battery.

Both of them essentially not allowing enough time for fuel to flow to the injectors.

So to summarize this point, if you run a 1.8 original mk1 with K-jet, it will be able to bleed it's fuel system from the fuel filter all the way to the injectors if there is air present and unless there is a problem it shouldn't anymore more than a fresh battery to allow for continuous turn over the engine.

Many thanks for replying everyone!

Bill.

Glad you got it sorted Bill, sometimes it's the simple things that you overlook!
I imagine it's probably going to perform quite a bit better with the new injectors.


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