Kangarooing with hot air when the temperature is as cold as it is???

/Gaspode on
All the answers for checking this are listed clearly in the FAQ
/Gaspode off

 

As a very old person who has had his car a number of years I can say i had this when it was new 9-10 years ago, at this time this "kangarooing" was usually put down to a sensitive throttle and responsive engine with a foot in the middle, making an over sensitive feed back loop.

The loop needs damping, ease the side of your right foot against the side of the foot well to dampen the loop. As Steve said also use more revs, this after all is a revvy engine and is not happy tiddling along.

Swapping vehicles I often forget to rev it a bit at first, and generally the car is much happier with a few more revs through the system, after all the gear change improves no end with a few revs to.

 

Whats the MAP ?

Really my knowledge on cars is very basic

 

[QUOTE=Dappa,Nov 11 2010, 08:50 PM] Whats the MAP ?

Really my knowledge on cars is very basic

 

There is about 2 A4 pages worth of stuff in the FAQ about this, I've just looked at it.
It's got a fantastic and comprehensive list of different parts of the engine to check and different things that could cause it.

Unfortunately, (as far as I could see) it doesn't say anything about it being down to driving style, and it doesn’t have the suggestion about dropping the clutch or releasing the gas, or stopping the feedback loop (as Chippo described it)

From what I've read it's perfectly possible to have a bit of a kangaroo problem without their being anything particularly wrong with the engine.
Maybe it's more common in a 5+ year old engine than a new engine?

Perhaps this is just another one of those things that's slipped through the net, and the FAQ could do with another paragraph adding.
BassO, for the sake of clarity I am not impugning the fantastic FAQ, it just perhaps needs some updating with newer ideas in some places..

 

I would be most surprised if you had kangaroo problems relating to heatsoak with temperatures as cold as they have been. Mine only had minor issues with this in the warm summer months.

He said he'd already played with clutch and throttle to no avail in the original post.

My last violent kangaroo session was cured by greasing the O ring under the map sensor.

 

Whacking MAPs is cruel and must be stopped at once! Just imagine the trauma that you are inflicting on a poor defenceless MAP! You should be horse whipped.

 

I hope you bought it dinner afterwards.

 

Nah ... i'm as tight as you are

 

Fwiw, this is my old car. It already has a cold air intake similar to an AEM. Never had any issues with heatsoak/kangarooing so I can only think its down to the MAP sensor or potentially driving style? maybe needs more revs and a little more clutch slip in traffic to stop it bogging down? After doing a bit of searching on the forum- try not to let the revs drop below 1800-2000rpm when you pull away and see how it goes?

Can't imagine it being heatsoak anyway as it has a CAI and it was COLD outside yesterday!

ps. the MAP sensor is the black box on the throttle body iirc.