Weird Performance

[waynepixel]

I now this is a long post, but please help if you can. My Car is a 2001 Mk4 Golf GTI 1.8 Turbo, AUM, with stage 1 Revo.

My car is acting very strange. I was on the motorway tonight, and I pulled out too overtake another car, and for some reason the car just stopped pulling or acceleration, this problem went on until I stopped the car. The only way to describe what was happening is that the car lost all of its torque, but it was not in limp mode. So I parked the car and had a look at the engine to see if anything was wrong. I let the car cool down for 10-Min and to my surprise the performance returned back to normal.

I am at a loss as to why or what is making this happen. It cannot be my clutch because it would be a constant problem, and it is not. I have just changed my MAF for a new one, from a VW dealer, and that helped allot with overall performance with the car. I have changed the spark plugs, engine oil and oil filter, and fitted a new Forge Diverter Valve. and I am still getting the same problem.

I really am at a loss as to what is going on with my car. If anyone on this forum has an idea as to what the hell is going on with my car, then please advise. It is driving me mad.

[swisss]

was it misfiring or making any strange sounds from the turbo?

My Turbo went loony once and seemed to basicaly switch itself off. From memory it wasn't a new turbo, just a valve.

[_Batty_]

boost spike?
hence ECU goin into temp safe mode?

[monkeyhanger]

There is a common issue with a pipe collapsing on the 1.8T which causes something like this. I can't remember exactly which pipe it is though. One of the specialist forums (Cupranet) etc will be a mine of info.

Edited by monkeyhanger on Thursday 20th July 19:29

[Fat Audi 80]

Sounds like classic boost leak syptoms to me. You need to find the source of the air leak in one of the many pipes in the high pressure intake system...

HTH

Cheers,

Steve

[waynepixel]

It sound like the car is still accelerating but going no where, if you know what I mean!. I am driving over to Big Boy Toys today, and they are going to try and find something wrong. I will report back with any info.

Thanks for you help people.

[Fat Audi 80]

mungo said:

Mine is running over rich with Revo turned on and over boosting ... The VAG specialist have tried EVERYTHING on my car over the course of two days and even working on it in the evenings.

They have concluded that with Revo turned off it runs faultless (but obviously with only 210 bhp as opposed to 265 )

So it looks like it's back down to 210bhp for me now.

I spent a fair bit on the Revo upgrade - wouldn't really reccomend it after this experience ... long and short of it now is it's time for me to move on and get a new car now I think

See the MRC guys, I have heard nothing but good things about them and I am sure they can give you back that feeling you have lost...

www.mrctuning.com/

Cheers,

Steve

[Fat Audi 80]

Fair enough, but how are you going to beat TVR's???

[waynepixel]

The chap at Big Boys Toys contacted Revo for me and basically said, on very hot day like today, warm air can upset the Revo re-map and if it get to hot, the car will put itself in limp mode until the engine cools down again. Which I suppose is what happened to me.

I still do not get how warm air can put the car in limp mode because my engine temperature was normal, in the middle of the dial. I am not to sure what they are saying.

I might Email Revo and ask them to explain it for me in more detail?

[loose cannon]

my friend's old ibiza cupra r was nearly 360 odd horses and wasnt quicker than my rv8 tvr though it was not far short from a rolling start. when his octavia vrs gets returned from jabba sport with over 450bhp im sure that will beat it from a rolling start. should be a bit of fun

[monkeyhanger]

mungo said:

Thanks mate but I don't think I will ever remap a car again

Why not? 1 bad experience with Revo (i shall not comment further, name & shame etc) should not put you off.

Take it to one of the numerous other VAG tuners for a proper remap...oops

[monkeyhanger]

waynepixel said:

The chap at Big Boys Toys contacted Revo for me and basically said, on very hot day like today, warm air can upset the Revo re-map and if it get to hot, the car will put itself in limp mode until the engine cools down again. Which I suppose is what happened to me.

I still do not get how warm air can put the car in limp mode because my engine temperature was normal, in the middle of the dial. I am not to sure what they are saying.

I might Email Revo and ask them to explain it for me in more detail?

If that's a feature of their map then they need to sort it out IMHO.

I've never hit limp mode in the Octavia on any day, hot or otherwise and that includes spanking it around Bruntingthorpe, Croft and Silverstone on red hot days.

[waynepixel]

monkeyhanger said:

waynepixel said:

The chap at Big Boys Toys contacted Revo for me and basically said, on very hot day like today, warm air can upset the Revo re-map and if it get to hot, the car will put itself in limp mode until the engine cools down again. Which I suppose is what happened to me.

I still do not get how warm air can put the car in limp mode because my engine temperature was normal, in the middle of the dial. I am not to sure what they are saying.

I might Email Revo and ask them to explain it for me in more detail?

If that's a feature of their map then they need to sort it out IMHO.

I've never hit limp mode in the Octavia on any day, hot or otherwise and that includes spanking it around Bruntingthorpe, Croft and Silverstone on red hot days.

That what I was thinking. I have sent an email of too REVO and I am waiting to hear from them, Monday. I might give them a ring on monday too. I have a funny filling that chap at Big Boy Toy was talking a laod of carp.

Edited by waynepixel on Saturday 22 July 16:23

[waynepixel]

waynepixel said:

monkeyhanger said:

waynepixel said:

The chap at Big Boys Toys contacted Revo for me and basically said, on very hot day like today, warm air can upset the Revo re-map and if it get to hot, the car will put itself in limp mode until the engine cools down again. Which I suppose is what happened to me.

I still do not get how warm air can put the car in limp mode because my engine temperature was normal, in the middle of the dial. I am not to sure what they are saying.

I might Email Revo and ask them to explain it for me in more detail?

If that's a feature of their map then they need to sort it out IMHO.

I've never hit limp mode in the Octavia on any day, hot or otherwise and that includes spanking it around Bruntingthorpe, Croft and Silverstone on red hot days.

That what I was thinking. I have sent an email of too REVO and I am waiting to hear from them, Monday. I might give them a ring on monday too. I have a funny filling that chap at Big Boy Toy was talking a laod of crap

Edited by waynepixel on Saturday 22 July 16:23

[monkeyhanger]

Heat Soak is a genuine problem on hot days, but it should show up by the car feeling sluggish and down on power and not throw the car into limp mode.

[waynepixel]

monkeyhanger said:

Heat Soak is a genuine problem on hot days, but it should show up by the car feeling sluggish and down on power and not throw the car into limp mode.

Exactly what I was thinking. Heat Soak is a problem but I have only known it to bring down Bhp, not loss all toque in a car engine.