Where has all the boost gone?
This weekend we went away Thursday night in the truck to escape a tropical Cyclone that was going to hit the whole of NZ with a major effect on the East Coast and the Bay of Plenty.
Checked with friends in the Far North and they confirmed that the cyclone had missed them and the rain had stopped. turned out that the cyclone did not cause as much trouble as expected.
Loaded the fridge, some gear, the dogs and the wife into the truck and off we went.
Pretty soon it became apparent that there was something wrong with something under the bonnet.
Boost looked OK but Pre Turbo EGT's were getting out of hand under hard acceleration on long uphill runs. Easing off the throttle which usually brings things back under control if we are pushing on a bit hard did not make the expected difference like it always has in the past. Funny though still got 14 psi of boost. It is dark out so hard to see what is happening at the exhaust end of things but it does not seem to be too bad. Just can't work the truck as hard as I used to be able to up the hills.
Did nothing on Friday. No shops open so we just played at being couch technicians watching Youtube clips of this guy.
4xOverland
On Saturday morning I thought I had better have a look to see what was going on under the bonnet.
Nothing was immediately obvious so I took the truck for a couple of runs adjusting the boost controller to see what was going on. no matter what the adjustment I was only getting 10 psi boost. I finally blanked off the line to the waste gate and still only got 10 psi boost no matter what I tried.
So while reconnecting the boost controller I noticed a few threads poking out of the intercooler hose near the AC Compresor. Closer examination revealed a hole in the hose. AHA that is probably the problem. Still getting pressure at the boost gauge but loosing air volume out the hole. Good thing that I have the EGT gauge or things might have gotten out of hand.
This looks like it could be a problem in a country town with no ARB shop and definitely no Safari Intercooler shop.
A quick trip the the local Auto Parts store REPCO and I was able to source a piece of 63mm silicone hose in a fetching Blue colour. Around the corner to the Empire Mart (one of those places with almost everything cheap) and I found some hose clamps that would do the job.
Around to a local panel beater that was there for some strange reason, a quick fossick in his scrap pile found a piece of 60mm thin wall steel tube.
Take all the bits back home and replace the split section with a new bit with a steel sleeve inside it.
Then I had to get the boost controller set back to where it was so that I did not overboost things.
Got it close before we were off to lunch and then down to Shipwreck Bay (Ahipara NZ) for a trip south down the coast to the Herekino harbour.
We wanted to see what had happened to the beach after a huge outflow of sand had occurred a month ago that swallowed a double cab Nissan Pickup that had been stuck and was in the way when the sand all came flowing out.
There are some pictures of it stuck with just the top 4" showing. We found it on Saturday afternoon by probing with a spear. It is buried with the top of the roof under about 18" of sand and is about 30m from the edge of the sand flow.
The hole that you can see in the above picture is probably 5 yards deep and 20 yards wide and goes back into the sandhills for a long way. We attempted to find out how far but only got about 1 mile as none of us were willing to drive our trucks in the potential quicksand bottom of it.
We also saw a few of the wild horses that frequent the coast in the area.
And of course somebody got stuck
So after all of that we had a great day and drove home today.
Had to stop a couple of times to make very small adjustments to the boost controller to stop overboosting on the big long hills and during upshifts.
Got home late afternoon after avoiding most of the holiday weekend traffic.
I will have to spend some time this week trying to order some new intercooler hoses from the dealer that installed my intercooler 14 years ago.