Strange Hoover Noise When Starting Car From Cold

[t-sport_king]

please help, when i first start the car i get a noise that i can only describe as a hoover noise please help it is so annoying it only last for abou 30 secs then goes off what can it be????

[Ckman85]

please help, when i first start the car i get a noise that i can only describe as a hoover noise please help it is so annoying it only last for abou 30 secs then goes off what can it be????

hav u fitted a induction it? its sounds like the engine sucking in air from the induction

[jeromey]

please help, when i first start the car i get a noise that i can only describe as a hoover noise please help it is so annoying it only last for abou 30 secs then goes off what can it be????

try survicing your starter maybe the gears in the starter wants greesing ;)

[Mooly]

There is a fan/blower on the induction side, cant remember it's proper name, to help with emmisions and warm up. You hear it spin down if you start up for a few seconds then switch off from cold. Wasn't this the cause of the "dimming" lights ages ago- which is not a fault by the way. Should not be that loud though !

[ae102]

its the cold air pump

[t-sport_king]

i dont have an induction kit but it only recently started making this noise, it is a serious problem. it does sound like a fan noise

[Mooly]

Cold Air Pump--Thats's the one. It's standard fitment and it lives under/around the air filter, a bit hidden away. If you can get a hand on it you might feel if it's vibrating etc.

[ae102]

the pump lives behind the cowling in the wheel arch - in front of the fog light. remove the n/s lower lip, or the first couple of screws then remove the screws around the cowl so it can be removed. you will see the pump in front of the fog light - check to see if a hose is split or the plastic pipe/water drain is not seated right. if you need to remove the plastic pipe push it away from you - you'll see the sliding mounting its on. Hogie had to replace his for what reason i'm not sure.

[Hogie]

Crap design was why i had to replace it. The plastic fan housing warps with the heat from the motor

Called a secondary air injection pump

I think the pump feeds air into the exhaust. Warms up the cat quicker. It should fire up on a cold start. There is a pipe running across the top of the rad coming out on the left hand side of the engine as you look at it, this is a pipe from the pump. It then goes in to a valve on the side of the engine and in around the back of the engine to the exhasut manifold.

Get a set of pliers and hold the metal clip that pinches the rubber pipe onto a black metal one. Pull the pipe off. Start the car. If you can feel air being pumped out of that its working, if not you have a leak further down the system. Damaged pipe of a broken lug where the pipe is attached on to the pump.

The pumps are 800 euro to replace but sure your one sounds like its working.

If you want a document on them PM me your e mail address. It will tell you everything you need to know about testing it and the location on the car.

[ae102]

it pumps cold air in to the intake so on start-up less fuel is required ;) why for such a little saving? the fuel it saves would never pay for the part - probably some californian regulation although its that hot there it would never kick in?

[Hogie]

it pumps cold air in to the intake so on start-up less fuel is required ;) why for such a little saving? the fuel it saves would never pay for the part - probably some californian regulation although its that hot there it would never kick in?

All emissions crap, its probably something they had to fit to get the engine into some sort of emissions bracket, within certain levels. I googled them before, used them back in the 70s in America, called them smog pumps.

My lecturer used to work for Jag, he worked on the team designing the electrics on the s type and x type. He was telling me about them, thought these pumps were a load of shi*e really, think he said he was doing something with them on the Jags. Anything like that on a car nowadays is emissions, they won’t spend money on extra parts if they don’t have to.

He said he was driving a prototype fast x type, never went into production, nothing had been done on it for emissions, testing it out, said it was wicked fast, unbelievable fast he described it as, nail you to the seat, but because the x type wasn’t a success never went into production. He said the baby Jag was such a rush job, they were given less than a year from drawing board to production. If it had gone into production he said they would have lost most of the power when it came to how smokey it was. Bit of subject but hey someone mite find it interesting.

Think are engine is to dirty now, that could be why they are not using it.

Ill quote the doc, specific to the 2zz-ge.

"In the air injection system air is pumped in to the exhaust manifold by and electric air pump in the specified time. Because of this the catalyst will be warmed up quicker when the engine is cold. This pumped air flows to the exhaust port of each cylinder via the exhaust switching valve."

Doc also shows the layout of the system, with the pipe going from the pump across the top of the radiator and round the back of the engine via the valve. Ways of testing it for faults too, is it the relay, pump valve etc.

Now there could be something going up to the air filter areas also but I think that’s the pumps its main purpose, nothing in the diagrams or text about the inlet side.

If you want it ill e mail it on to you, jus PM me.

Wont fall out about it either way

[ae102]

send us a copy mate - want to see how this works. i thought it blowed straight into the inlet? what that says makes no sense - its attached to the inlet......... i'm confused now but that aint to difficult to achieve!

[t-sport_king]

the pump lives behind the cowling in the wheel arch - in front of the fog light. remove the n/s lower lip, or the first couple of screws then remove the screws around the cowl so it can be removed. you will see the pump in front of the fog light - check to see if a hose is split or the plastic pipe/water drain is not seated right. if you need to remove the plastic pipe push it away from you - you'll see the sliding mounting its on. Hogie had to replace his for what reason i'm not sure.

yeah tht be gr8 its cavking1@hotmail.co.uk cheers m8

[Dimzit]

Can someone email it me please dimzit@protonmail.com