2.1dj non-starter. Where now?

[KarlT]

Cheers mate for reply.

Yeah, Always like to have a sleep on a problem & things always seem clearer/calmer the morning.

Checked petrol a T' junction, but am also thinking injectors or earth. Thinking back, all that cranking & hardly any petrol smell. Never removed injectors before, they look abit rusted in. If it is them, can I clean them, unblock them?

[icosahedron]

What reading does the TEMP2 sensor give at the ECU connector? Should be between 3000 to 5000 ohm for a cold engine at this time of year. Then again, if the problem was there then the reek of petrol would tell.

Also, you say that you do have petrol at the T-junction but do you have pressure? Pulling a fuel line off suddenly should cover you and the engine in petrol.

[mm289]

Injectors are held in by one bolt per pair (10mm IIRC). They have a metal bracket like a pair of spectacles that sit on a rubber ring that applies pressure to hold the injector in place.

Looks something like these

They always look carp on an old van, first test is to check you are getting fuel out of them, but only test one at a time or you will spray petrol everywhere (needless to say take necessary precautions )

When they fire you should get a strong conical spray. If you get nothing you can try cleaning with brake cleaner or similar but I ended putting mine into an injector specialist - typically about £15/injector and they will test and clean.

Look here for specialists near you http://www.asnu.com/centres.htm, these guys do it by post and have been used by a few 80-90 members I believe http://www.injectorcleaning.co.uk/, here is a vid on how to do it yourself but I haven't tried this personally http://www.youtube.com/watch?v=VFJlTfHyrUk.

This is just one area to diagnose though, just a case of ruling out different possible causes

MM

[KarlT]

Cheers chaps.

Yeah tested pressure by removing bolt on T' junction & turned the ignition on...... Petrol on roof!!

Liking the injector idea though. No smell of petrol, & new tank fitted recently by PO, lot of disturbance & old tank must of been pretty rotted to replace.
Will just need someone else to turn key! (They've all gone off on holiday! Damn them!! )

[icosahedron]

Yeah tested pressure by removing bolt on T' junction & turned the ignition on...... Petrol on roof!!

That would prove that the fuel pump is fine but not the regulator. Switch ignition on and then off after a few seconds. Now remove the bolt and there should be a healthy squirt of petrol, don't get it in your eyes though!

[KarlT]

Okay scratch injectors.
Took them out, followed Haynes, but by myself so just pointed them in a tub & went to ignition.
5 second turn over & back to engine.
From the two injectors about a large teaspoon full of petrol in tub. I'd but cardboard infront so could see that both injectors fired. Obviously couldn't see nice cone spray but there is petrol going in.
One of the injectors didn't have a seal (number 1) fitted.

So next thing is earthing I guess.

[KarlT]

Yeah tested pressure by removing bolt on T' junction & turned the ignition on...... Petrol on roof!!

That would prove that the fuel pump is fine but not the regulator. Switch ignition on and then off after a few seconds. Now remove the bolt and there should be a healthy squirt of petrol, don't get it in your eyes though!

How much pressure are we talking?

I did what you suggested, Unsrewed bolt & there was alittle squirt, nothing to worry eyes, maybe a couple of inches & then a dribble....
Story of my life!!

[icosahedron]

Pressure should be 2.5 bar. Dirt stuck in the regulator can lower the pressure, starving the engine from fuel. Very unlikely with a fuel filter but you don't know what the engine has been put through. I always put compressed air through new fuel lines before installing, just in case something lurks inside.

[KarlT]

2.5 bar when ignition/pump is turned off?

[icosahedron]

When you switch the ignition on the fuel pump runs for a few seconds and then turns off. This is to pressurise the fuel system in readiness for starting. Once the engine has started the fuel pump starts running again. Even if the regulator is dirty or knackered it may still constrict fuel flow and allow a little pressure to build up. The engine will however run poorly. A pressure gauge on the fuel system will take out the guesswork.

If you turn the ignition on for a few seconds and then off the pressure in the fuel system should remain for a while.

[Aidan]

it's a dj so has TCI, most likely failure, how's the spark ?

[KarlT]

Morning,
I pulled spark plug & held against engine. It did spark but didn't fill me with confidence.
What is the TCI?

[mark]

What is the TCI?

http://www.tav-autoverwertung.de/shop/S ... -905-351-D" onclick="window.open(this.href);return false;

mark

[KarlT]

Ahhhhh, What does it do exactly?

[mark]

Its basically an ignition amplifier. The ignition control unit is the ECU but it only says when to spark, the TCI amplifies it to the coil, so a stronger spark produced.

get me i knew nowt about em 2 months ago


mark