My car hates me "reving"

[Lazy-Ferret]

I think my car hates me... I so like this car, but it is doing everything in it's power to cost me a fortune and try my patience.

Just to re-cap

My car burns oil... was just a little, but has turned into a lot over the past month or so... I only run on Diesel...

The other day, while travelling home with the caravan on the back, I had travelled a few miles, and stopped when I found a safe spot, as I had forgotten to put the extension wing mirrors on. As it only takes a few seconds, I left the engine running while I did it. I Jumped back in the car, went to pull away, and the engine suddenly started reving right into the red... My first thought was the throttle peddle was stuck under the carpet, so stamped on it a couple of times, (I did not think it was) but the revs just dies down after a couple of seconds, and the car went back to normal... I checked the pedal and carpet, and it all seemed Ok, so I set off carefully, and after 350 miles of driving and it was fine. The thing is, I don't think I even pushed the pedal to the floor, as I have found you do not need to, and I was just about to gently pull away.

Since being home we have only done about 50 odd miles, and those have been short journeys, and she has been fine.

Today, I was waiting to pull out of a junction, Car in gear, clutch down and other foot on the brake, and without me touching the accelerator, the revs shot up again, right into the red, going past the red warning line, and stayed there for 2 or 3 seconds... it felt like forever. The car was screaming, and smoke was piling out the back, and just as I was about to hit the kill switch, the revs slowly dropped back down to normal, and it was back to normal, and OK to drive home.... While this was happening, I tried pumping the pedal, just to see if it had any effect, and it did not.

Any clues.. as to be honest it is a bit worrying now, if it did that and caught me off guard as I was easing off for a junction or something, I dread to think what could happen.

My only thought is the car is free running on the engine oil that is being blown into the air intake, and once it has burnt it up, it returns to running on the diesel supplied by the throttle system.

Anyone seen this?

 

[stinka]

Yeh I'd say it's running on oil in the intake from somewhere

Have u got rid of the breather blow by valve yet ? Just pull both pipes off and vent this to air, take the valve completely off and see how it runs

Also is your turbo ok ? Have u had the intercooler off yet to see if it has oil in it ?

 

[briggie]

not on a terrano ....... but ......

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[briggie]

i know nuffin as most people will confirm ........ but id suggest the tps .... throttle position sensor :nenau

 

[Lazy-Ferret]

Yeh I'd say it's running on oil in the intake from somewhere

Have u got rid of the breather blow by valve yet ? Just pull both pipes off and vent this to air, take the valve completely off and see how it runs

Also is your turbo ok ? Have u had the intercooler off yet to see if it has oil in it ?

I have been posting about this on another thread as it is driving me nuts... http://www.nissan4x4ownersclub.com/forum/showthread.php?t=17483 solarman216 has kindly offered to help me change the valve stem seals, and I am just waiting for them to arrive.

I have in the past taken the link pipe off between the breather valve, and the Air intake pipe. Blocked off the feed into the air intake,and fitted a small filter onto the output from the breather valve. That resulted in Oil all over the engine bay... Good news though, it stopped the oil in the Turbo, so I guess that is OK.

Since then, I have fitted an Oil catch tank between the rocker cover output, and the original Blow by Valve, which has a drain back into the sump, via a "T" piece into the same pipe that runs from the bottom of the Blow by valve, but oil is still getting through to the inlet pipe.

I have taken the IC off, it is actually very clean, I guess because it is being continually flushed through with fresh engine oil. I de-greased it inside and out, and then using a hose, I did a very basic test to see if it was clogged, Water ran through with out any issues or apparent restrictions. I finally I left it full of water on news paper for an hour or so, to see if it had any obvious leaks. I have not got the equipment to pressure test it, but as far as I can tell, it seems fine. While I had it off, I thoroughly cleaned the outside off as well, and when I re-checked it, a couple of weeks later, there are no marks indicative of a leak.

not on a terrano ....... but ......

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:bow:bow Ok, I take it back, My car does not hate me that much... that puts mine to shame....

I was wondering about the throttle sensor, that was what made me post a new thread on here, but then I remembered someone saying I could run the car on old engine oil, and knowing I have this oil problem, put two and two together, and decided that the oil might be more likely.

The main thing that makes me think that it is not the sensor is, I would have expected it to respond to me pumping the pedal when it was reving. Not sure how it works, I guess a wire shorting to earth might do it, but then you would expect it to do that while driving rather than stationary.

I am at a loss at the moment, and can't seem to make it do it by fiddling around.

 

[96terrano]

yeah, ide say its running on oil:doh i dont know if it's the same on the TDI as the TD but on the TD the breather for the rocked cover vents into the air intake, so it the breather is leaking oil.....well......you can see the problems:doh

 

[Banshee]

not on a terrano ....... but ......

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That was mental!!!!! lol

 

[makeitfit]

Sounds more like a knackered oil seal on the turbo If as you say the oil blow by is now into a catch tank . Oil will fuel the engine the same way as diesel does. So the engine is getting a good feed of oil from somewhere to over run. You were lucky it didn't do the full monty
It can also happen if you over filled with oil perhaps? To do that though I'd expect those valve seals to be completely fooked
Turbo recon won't cost the earth if you take it off and send it to turbo mendy man.:thumb2

 

[Terranical]

Just a little start-up puff then! :lol

 

[rustic]

Sounds more like a knackered oil seal on the turbo If as you say the oil blow by is now into a catch tank . Oil will fuel the engine the same way as diesel does. So the engine is getting a good feed of oil from somewhere to over run.

My thoughts exactly.
Check the bearings in the turbo, if too much play, will take out the oil seals.
If it does rev again, turning off the ignition will have no effect if it is the oil from the turbo...

 

[melissachels]

That was mental!!!!! lol

if it does that stall it! taking the key out does nothing if it gets too far, my vectra done it covering st vincent st in black reek & proceeded to crack the block & spatter oil & water everywhere! started nxt day as if nowt had happened

 

[makeitfit]

If it happens again and does run away, a quick rescue is to throw a hanky or rag up your intake. Three spring clips and you're in. It'll get jammed in the turbo but at least save the engine :thumb2

 

[Lazy-Ferret]

If it happens again and does run away, a quick rescue is to throw a hanky or rag up your intake. Three spring clips and you're in. It'll get jammed in the turbo but at least save the engine :thumb2

Cheers... Hopefully, foot on brake, 5th gear, and clutch up quick will do the trick...

I am pretty sure it is not the Turbo, as that was clean when I disconnected the PCV system

Hopefully, once I have the Valve Seals, and get down to see the Very Nice man in Bexhill on Sea, with his experience and keen eye, he will be able to say what it is.

The problem I have, is this is my first Nissan, and the only Terrano I have seen up close and personal, so have nothing to mentally compare it to. Not only that, but while I have the Theory and the ability to wield a spanner, as I did my Automotive Engineering, I do not have the experience of doing it in real life, as I went into Electronics instead of mechanics.

 

[solarman216]

reminds me of the Commer TS3 engine, absolutely fantastic piece of engineering, 3 cylinder 6 piston two stroke super charged diesel, enormous power for it's size, but some models had problems, one was the oil bath air cleaner, many a young lad over filled them on a service, you can imagine what happens on start up oil into intake and revs itself to destruction if you were not quick to stall it, and the other one was they would run backwards if kicked that way and once running again would rev to destruction as the pump governor did not work in reverse, if I remember correctly the introduction of the rotary pump cured this, the in line version would pump whichever way it was turned, Rick