Possible limp mode?
 

This is very strange it's never happened before and i'm worried it could be something serious.

Today I was driving for about 20 minutes casually, not speeding or anything strenuous. It started raining very heavily and I had to stop the car when I got home, get out and put some things in the boot of the car from the garage. I left the car running while I did this (maybe 3 minutes) and then I got back in and began to drive away.

As soon as I got onto the road and tried to put it into 2nd the car started jolting very hard back and forth, same with 3rd, and 4th. I realised it was happening any time I took it to around 3k RPM. Engine temp was fine, (below 220).

So I managed to get home anyway and it's sitting outside now, i'm waiting for it to stop raining before I go check it out.

Is this limp mode? or something else? I did do some strenuous driving last night for about an hour or so on the track but I didnt get limp mode, drove it home fine, it drove fine today, and the temp last night didnt go over like 225 ish.

Any ideas??

Hard to say what's up but it's certainly not normal and not limp mode. The short answer is that it needs a trip to the dealer. Let's delineate things a bit more...

Does the car 'jolt' when you're rolling along at speed with the clutch depressed and shifter in neutral? (this would rule out a rear differential and e-brake issue)

When you're driving with the car IN gear, does it jolt or feel abnormal BELOW 3k RPM?

Is this something that happens when you reach or surpass 3k RPM with slow acceleration or is it elicited by an aggressive acceleration only?

Others, feel free to chime in with more questions or suggestions.

See if it does it again when you start it up. Maybe unplug the battery and let it reset and see if it was some random electronics glitch.

Or just take it straight to the dealer!

I didn't try to roll with the clutch in in neutral, but in gear below 3k it's completely normal.

It actually started because I was turning left at a red light and stalled when I took off. I then got it going but it seemed very odd, like I had to give it way more throttle than usual. I pulled up somewhere and turned the car off and tried to take off again and it was very hard to NOT stall, I can't pinpoint why though.

It's not to do with hard acceleration at all I drove it very smoothly and as soon as it reaches around 2.5-3k it jolts like someone who doesnt know how to drive manual would jolt when they start the car...if you see what I mean

Sounds like the engine might be starving for air/fuel. My old Mustang had a history of intake air control valve failures which would result in behavior similar to what you're describing. The car couldn't idle without help and it wouldn't really go.

also tried with VDC on, and off. no difference.

I wonder if this might be a residual side-effect of your accident. Like maybe there's a crack in the diff or something and water is getting in.

Ooo, I forgot about that. Could be.

I'll go get it checked out by either the dealer, or the company that worked on my car after the accident. But I just went and tried it again and nothing, it all works fine now.

Is everything stock on your car?

You mentioned that it was raining heavily. If you went through any standing water it could have caused the problem.

yes everything except I put a shift knob in.

(side-story; I took it to a drag strip on friday, and after a few runs my shifter kind of got stuck in the middle, in neutral, I couldnt put it into 1st or 2nd, and couldnt get it into reverse. I did eventually jimmy it out and it hasnt happened since, but that was odd too.)

and I have a double din pioneer head unit.

I have the base non sport pack.

That does not sound good.

I know lol I need this bollucks sorted

Yeah...I would try a simple re-boot first..

Well the problem has seemingly vanished now, so I dont know wether to wait until my next sevice and oil change (1000 miles) or take it in this week.

If they can't duplicate it, they can't fix it. I'd just document it and discuss at next visit.

Maybe its because you are use to driving a RHD? ;P

Sounds electronic to me.... watch for it when it gets wet/humid again....

This is the closest thing i could find doing a search for something that just happend to me. Was driving slow...stuck in traffic...weather is sunny 32*C and my oil was reading 110*C. Car would jolt if i gave more then 40% throttle or go near 3000rpm...did this in all gears, i had to drive in 5th gear to go 60kmh. Seems like the same issue u are having..i installed G3 intake 2 days ago....ever find out what the issue is? Is it actualy limp mode?

bump...it went away but as i was coming home tonight it happend again but my oil temp was 90*C so it wasnt due to over heating...it is now raining outside....does anyone know what this is.

Limp mode is generally engaged when the ECU detects a sensor input that it is not comfortable with, IE not enough signal output to support higher RPM operation. The trick is to find the sensor that is either bad, or reporting below normal output. The dealer may need to scan the car to find this..The oil temp limp is just one cause, and not a factor here obviously..

While this is a chart from a Motronic system (VW/Audi) it gives you an idea of all the sensor inputs that are used to feed the ECU..

http://images115.fotki.com/v663/phot...diagram-vi.jpg

i found out the issue....car is fine, just me not tightening a bolt all the way and it came loose on the intake pipe. thanks though