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2007 STi Spec D.
This morning at traffic lights I could hear what I thought was knocking on tickover....I mean, I thought I was about to spin a bearing or throw a rod.
..it was that bad.
Anyway, was on my way to Len at Subaru 4 You in Newbury where he had a listen.
It had been getting worse over the course of a week looking back.
Couldn't believe it when he said "That's your fuel lines"
And sure enough, he was right. It's coming from one of the two fuel valves - feed rather than return - near where the fuel filter is on a classic, by the passenger side front turret.
Len lightly crimped the feed line before and then after the feed line valve and the pulsing knocking / tapping noise stopped....seemingly ok since driving home too. You could hear it louder in the car....transmitting through the bulkhead where the lines are then hard plastic.
Seriously thought I was in for a huge repair bill....or possibly something silly like an idle tensioner....but never a noisy fuel line!
Anyway, will keep an ear on it and replace if need be....be about £90 for the bit I think, easy to fit.
Great top tip that! I’m sure some less honest establishment would try pull someone’s pants down over a billy basic fault and end up having who knows what work carried out. Thank you for passing this info on 👍🏼.
Great top tip that! I’m sure some less honest establishment would try pull someone’s pants down over a billy basic fault and end up having who knows what work carried out. Thank you for passing this info on 👍🏼.
My feeling exactly, sounded so bad....Turned out something so daft!
Update, sorted.
Bits arrived Wednesday, bit of a pig getting the line onto the hard feed by the bulkhead. The hard pipe moves around a lot, and not a lot of room to hold it from behind and get the new rubber line on.
Anyway, noise stopped, and car runs a lot smoother.
I just thought I'd chip in as I've exactly the same problem, I took it to one place and they did a compression test and told me it looked like ringland failure, repair bill being around £3K. I took it to Richard Henry Motorsport, who did a compression test for me, told me all cylinders were bang on 120 and the noise was the fuel lines. I've dodged a massive bullet.
For those that come across this thread the part number for the fuel line damper on the feed is 42086FE030, marked here.
Wow, that was a close call. Good job you chose someone honest like I did!
Strange though, the dealer I got mine from had never heard of a fuel damper fail, he's been in the Subaru trade many years and was sceptical it would sort it, but it did luckily.
I think an easy diagnosis is what Len did, crimp the feed with long nose pliers - the noise should stop, and engine would almost die off from fuel starvation. A very quick and conclusive test.
While I am waiting for the part to arrive from Japan, this has lead me to think about the fuel filter. It is due to be replaced at 60,000 miles which I am not far off. These posts might be of interest to you.
While I am waiting for the part to arrive from Japan, this has lead me to think about the fuel filter. It is due to be replaced at 60,000 miles which I am not far off. These posts might be of interest to you.
I had the exact same thing after an engine rebuild on my hatchback, I took it back to the builder thinking the worse, he couldn't identify it but told me it wasn't the engine. Anyway at home I started listening and thought it was come from the fuel lines, I removed them then refitted them and it never happened again.
07 April 2018, 11:05 AM
Noisy fuel lines.....
