Tuesday, April 14, 2009

Sometimes the Gods smile on you.....

....and sometimes they turn round and take a dump on you.

So, it goes like this - MOT passed, feeling good. I'm sorting out the rough running (I'm running out of ideas but I'm still keen). I refit the air filter, it's all a little tight with the "spaced" throttle but it just about fits.

Now let's see if the timing is still OK. I find that the timing is a little off, weird because I've done that a few days ago. Never mind, get the timing gun out and get it sorted, dizzy feels a little loose so I tighten it all up.

The car's ticking over nicely and then just stops, dead. No stutter just stops. I jump in the driver's seat and whiz it over, it doesn't catch. Strange.

Then I get that flash of inspiration or was it the sound of the pump changing ever so slightly or the stench of petrol? So with ignition still on (silly boy) I take a look in the open boot - it's not a good sight. The high pressure hose on the output side has split where it goes into the fitting - it's just old and had it's time.

You see the thing with a PI is that any "leak" on the high pressure side is not really a "leak", it's a Tsunami. So the boot is awash with petrol.


Unfortunately petrol attacks the stone chip paint under the colour and therefore in no time we're down to bare metal!

But every Tsunami has a cleaning effect, stripping away the old so the new can be built. I've ripped it all out and replaced the broken pipe, got it running and driven it into the garage. Tomorrow I will plan the relocation of the pump, PRV and filter. I may even sort out those boot boards I've got and tidy the whole lot up.

Before all this happened I also did something I have been threatening to do for a while. I stripped and "reconditioned" and injector. Dave P gave me a new seal about a year ago, it's a tiny "O" ring, it was an original Lucas one. The procedure is really simple, so simple I am bound to have screwed it up! There's an external circlip at the squirty end that you can remove with a small flat blade screwdriver. Then you can push the guts of the injector back through the input end, I used a brass drift to push it all the way.

From there you can see the guts of the injector and the O ring, fiddle that off and refit a new one, trying not to upset any of the rotating stuff - looks to me like you can twist things and set the trigger pressure - I left well alone. Reassembly was the reverse but I used a little light oil to ease the new seal back through the injector body. After refitting the C clip all was ready to whack it back in the car.

Guess what?

It only bloody worked - really good fine cone spray, no drips, no bubbles, fires at the right time - I am amazed.

And before everyone says "Oh but you need to set the trigger pressure correctly" - I know, I haven't and I don't know how to measure it so I'm not saying reconditioning your injectors is as easy as I have described because there is more to it. I feel that test rig is getting closer to being built.

From the guts of the injector I can't see a huge amount to go wrong, Dave P's been telling me for years they are simple and just to prove I do listen to you Dave - you're right, again :-)

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