Megane power loss

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Mon 26 Jan 2004 10:51
Megane power loss - joe
This is a query for a friend of mine. He drives a 1999 Megane 1.6 16v.

He has experienced an intermittent problem. Sometimes, shortly after starting the car and moving off, he experiences a short but dramatic loss of power, and it is almost as if the car is on the brink of stalling. It then immediately picks up again.

I suspect that this could be caused by 101 different fuel/ignition problems, but is this is in fact a common problem? I would be delighted to know. Thanks is advance!
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Mon 26 Jan 2004 11:20
Megane power loss - M.M
Joe,

Here is an updated version of a reply I made last year about a similar problem.

Try the cheapest option first.....Remove and examine the rubber vacuum hose from the inlet manifold to the MAP sensor on the bulkhead. Check for splits that may only show up when you bend the hose.

I've had two of these to replace on Megane's. This pipe is quite stiff and short, at certain engine positions the split would open and ruin the MAP input/mixture.

It was happening the most when you were drifting through town at low revs and then tried to pull away, you know how that makes the engine rock on the mounts. Once you had reached a cruising speed the split stayed closed and all was well.

Another symptom was them sounding like they were missing on one cylinder at idle.

They drove so badly at times you could have told the customers they needed hundreds spending but in reality a few minutes and 200mm of small bore hose cured it.

Get a small screwdriver or knife and lever off at the ends, they are only a tight push fit.

On the two I dealt with the hoses looked perfect at rest...the cracks were on the insides of the 90 deg bends and only opened up as the engine rocked in running....so you have to get the hose right off before passing it as OK.

M.M
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