Tuesday, October 12, 2010

The Saga Continues - Fuel Injection

.....but it's getting better all the time.....

Note: Nothing you will read here is a new discovery, tons of those before me figured all this out so I don't profess to be providing the world with anything "new". But this is my journey and you are reading it so enjoy :).

When we last saw our intrepid quasi-mechanic he'd breathed life (gas really) back into his persnickety steed. Well, the morning startup issue was far from gone, if anything it was getting worse. With the weather starting to cool and dry I used the old girl for work for a few days. Things were getting worse, regular back-firing through the intake and a new shifting problem. So I resolved to address some things last weekend.

So what we learned:

I have/had vacuum leaks, the CIS Fuel Injection System on a 70's era Porsche 911 is not a really complicated device, but it demands precise conditions to work properly. Apparently I was somewhat chasing my tail when I needed to be focusing on some little things. I sanded down and THOROUGHLY cleaned the popping off pop-off valve and re-expoxied that bad-boy, then I applied a gasket sealant to a weeping fuel distributor (this may be a no-no, but I've read there are no rebuild kits for this and it worked, so bite me). I also cleaned up and tightened as much as I could see while I was tinkering around.

Then I read my conditions sounded like a bad lean condition, I found the 3mm hole to adjust the mixture. Started it up and Voila! Cranked and running smooth in 20 seconds, amazing! The boy and I then enjoyed a slow drive around the neighborhood. Then the real test, 2 days later I sit down in the car, turn the key, 20 seconds later she's purring away. I've actuallly fixed a huge headache.

Next up, I've solved some massive shifting woes....

2 comments:

  1. CAN YOU CONVERT THE FUEL PUMP ON THIS CAR

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  2. Convert it to what? It's got an electric fuel pump, there are a number that "can" be fitted w/ varying levels of ingenuity.

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