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After finally getting my car running for about a month or so, I experience an issue where the car was blowing plumes of white smoke out of the exhaust pipe. This was a bit of a shock at the start as I had just driven it from my shed to home which is about 7km and the car was driving fine with no visible signs of anything being wrong. I returned to the car 3hrs later, I drove off and straight away noticed white smoke at first I thought it was condensation but though it was weird as I hadn’t driven the car that long ago. I got to the end of my street thinking it would have clear its self but it hadn’t, at least I was close to home.
I was under the belief that white smoke meant it was burning coolant witch wasn’t what I wanted with an engine that had done less the 1000km. With further inspection it smelt like fuel and a lot of it. I decided to leave it for the day. 3 days later the signs where pointing to over fuelling as the lawn behind the car was clearly suffering. Checked the sump and it smelt like fuel, checked the ECU and nothing looked out of place. I decided that it must be a faulty injector or one stuck open.
I removed the injectors and found that on 2 of then the bottom O’ring was perished. This is what seals the rail and keeps the fuel in the rail. I would say that by having the manifold removed from the block for so long the seals had dried out. This would mean that as the rail was trying to pressurise is couldn’t so was just pumping fuel in to the engine making its way down the bore and in to the sump. I wasn’t too concerned as I hadn’t done to may KM on the car once I noticed the issue.
I was planning on getting new injectors anyway as they will be required for the power level I am trying to achieve. The standard items are 440cc (yellow) I chose to go 1000cc (red) this will allow me the have the opportunity to run E85 if I choose to. When this set up was in my other car I was using 650cc injectors so I thought I needed to go bigger, if I was considering E85. The version 5/6 WRX has side feed injectors which proved to be difficult to find as most larger capacity injectors are going to top feed. I looked in to converting my rails but for the price I couldn’t see the point. I found a company in the states that made direct fit injectors up to 1200cc. With the Aus dollar being so strong it was a perfect time to buy.
With the injectors installed, oil flushed and new oil it was time to start the car “fingers crossed”. All is fine no residue what so ever out the pipe on idle, I still need to tune the car as it will be thinking that it still has 440cc injectors. But at least it is running.