Surging Puma

[Chops]

Good evening boys and girls,

Some may remember a few weeks ago,, well months now, I had an issue with the turbo hose busting and stranding me.
For anyone who's had this happen, you'll know the symptoms,, surging, then total loss of power

Well, when it happened to me, they (the dealer {Albury in this case}), replaced it with a hose straight out of a new 2013 Puma. These have a steel coil wrapped around it. At the time, Ivan (Wodonga Mech-LR Guru) says to me, "dont muck around, tie it up so it cant happen again".
Well, I didnt, I told him I would see how long it lasted without needing to be tied up. A bit of a comparison was needed .

So, this weekend, I get this surging feeling in the car, and moreso whilst going up a hill same as last time.
Today, I've climbed under the car to see what the damage is, and probably ring Ivan and give him the news.
Alas,,, the hose is in perfect condition well clear of pretty much everything, although you can see where it has rubbed very lightly on the steering column Will investigate this further.

So now the bad part,, why would it surge,,, any ideas guys? Anyone else had something similar? Its almost as if the powers been cut off for a split second or so.

The only thing I've done is change brands of fuel. I've been running Shell since I bought her, and two weeks ago I changed over to Caltex. So I've just tonight, put in the 3rd tank of Caltex.
I must say, at present, I am currently getting an extra 30K's out of a tank but I have to do some proper figures over a few runs.

I'll be servicing her this coming weekend, so I might do the fuel filter as well to see whats there.

[BigBlueOne]

I cant comment on the surging sorry but caltex fuel is brilliant in my 90. I get 600ks from a tank

[Dopey]

G'day Chops,
There are numerous different versions of the intercooler to turbo hose.
The latest variation in it still has the steel coil wrapped around a rubber protective piece on the hose, but also comes with a bracket that bolts on the alternator.

There are three points that the turbo hose rubs through (hose on the drivers side) these are,
1) The plastic clip on the inner guard.
2) The steering column.
3) The alternator.

With the new version there are a couple of brackets and nuts and bolts in the kit for it, and it can be a bit of a bugger to install.
The brackets hold the hose away from all three points of contact that rub through the hose.
Also the easiest tool for tightening the clamps on the hose is a flexible drive extension for a small socket.

The best thing that I have read for fixing the issue seems to be silicon hoses.
Quite a few people on here have put silicon hoses on theirs and do not seem to have the issues of rubbing through anymore, I think that the silicon hoses are a bit stronger than the rubber ones and don't droop down under the weight, don't expand under pressure like the rubber ones, and also don't have the delamination issues that seem to afflict the rubber hoses.
Mike.

[Chops]

G'day Mike, and thanks,
Yeah I'm aware of the bracket, but if the puma in the yard had one on it, he didn't take it off. 40+deg on the day, we were doing well just being outside.

When this hose does eventually look like going, I'll replace it with a silicone hose, but it can wait for now.

Right now, I just want to find out why it's acting like it's missing (like a petrol engine). It's not doing it all the time, and it seems to happen from around 2800-3000 revs, but sometimes, just cutting right out, or surging.

[BilboBoggles]

I suspect yours is a 2.4 puma? When you switch the engine off do you get three ticking grating type sounds, that's the EGR cleaning cycle. If you do get those sounds then all is good with the EGR. IF you don't or it's very noisey, then you might have a gummed up EGR valve. This valve opens and closes quite a bit as you move the throttle, I think from memory it's fully open at mid throttle above a certain rpm. But if this valve is sticking in any way then you'll find the engine surges quite a bit. I was getting about 60,000 k's out of the EGRvalves in my MY09 PUMA.

If the valve finally jams then it's easy to find, your check engine light will come on. But if it's just sluggish or intermittent then you won't always get a fault recorded, and the dealer will just tell you, they all do that..... I lived with months of surging until the falve finally jammed and the engine light came on, then the dealer replaced the valve and it was back to as new.. amazing difference.

[Judo]

I was watching this out of curiosity, but I have to say, my money is on Bilbo with an EGR issue. It matches the problem nicely IMO.

Cutting out OR surging, OR missing I would look at other issues, but all of them intermittently is what leads me to this conclusion...

[Chops]

Thanks guys, I'll listen for the clicks, I'm aware of them, but I'll see if I can pick up on how loud they are.

[Chops]

OK, the "clicks" are there when I shut down the engine, although, sometimes they're louder than other times.
The cars a touch over two years old, and done about 75k.

Probably a dumb question, but as a point of interest, is there anyway of cleaning EGR?
I've done a search, but can only find info about removing it, and remapping the motor. Just wondering if it can be pulled apart and maybe cleaned out with brake cleaner or something similar(?).

[Chops]

OK, the "clicks" are there when I shut down the engine, although, sometimes they're louder than other times.
The cars a touch over two years old, and done about 75k.

Probably a dumb question, but as a point of interest, is there anyway of cleaning EGR?
I've done a search, but can only find info about removing it, and remapping the motor. Just wondering if it can be pulled apart and maybe cleaned out with brake cleaner or something similar(?).

OK,, stop looking, its amazing what You Tube has on it

[dullbird]

I was going to say EGR and yes you can clean them...JC told Ian how to clean ours....