engine loses power in wet weather

[robsparky 0]

I've noticed this fault getting worse over the past month or so. Within a few minuites of driving in wet weather, the engine starts to lose power, becomes lumpy and a strange roaring noise comes from the exhaust ( as if theres a hole in the silencer). It doesnt misfire at all and never cuts out. The fuel consumption doubles and the engine labours up hills.

The spark plugs are new and the leads.

The problem clears with the weather.

Am i going mad or has anyone else had this?? I wondered if it could be the coil pack or a sensor under the car getting wet. Any ideas welcome. I had real problems with this last week in the floods.

[matth76 1]

Sounds like coil pack. Could alternatively be loose spark plugs that haven't been tightened up properly (happened to me when my car had a "full" service at a vw main dealers who didn't do the job well !) or could be a faulty lead. If you're getting a strange noise from the exhaust then that does sound like a faulty coilpack.

[rodney 17]

also check your MAF is connected correctly and not letting water in to the connections

[Donkey_Punch 0]

I have this problem.. this morning for example. caining it down with rain, rough engine on start up.. once under bonnet has heated up.. it disapears

[Donkey_Punch 0]

i was told it was coilpack to.. probs your best bet

[robsparky 0]

James, mine doesnt clear when the engine warms up. Normally ok on start up, even in rain. gets worse as you drive in the wet. After about 5 miles in the dry, it disappears.

It gets really bad if go through puddles.

[rodney 17]

is your engine standard ???

[robsparky 0]

yea, apart from a ramair induction kit.