Auto Gearbox Problem
have a 1999 Mondeo 2Ltr Auto I have a few problems, first there is a pipe I cant find where it needs to go, it comes out of the gearbox just under the battery on the near side of the car, I think it is a vaccume pipe, it is about the same size, cant find where it goes, clue... when i blow or suck on the pipe i hear a gurgling grom the gearbox oil ????
Second the car has started running very rough, no power at all and kicks and coughs and the revs go right down when i try to pul away, it even stalls when i have it in drive and turn the steering wheel, nothing has been done to the car recently, apart from a new small bottom hose (gearbox cooling i think goes to back of gearbox) oil is ok as far as I can tell gearbox and engine, HELP I LOST.
Thanks in advance
Graham
Second the car has started running very rough, no power at all and kicks and coughs and the revs go right down when i try to pul away, it even stalls when i have it in drive and turn the steering wheel, nothing has been done to the car recently, apart from a new small bottom hose (gearbox cooling i think goes to back of gearbox) oil is ok as far as I can tell gearbox and engine, HELP I LOST.
Thanks in advance
Graham
I've just been round, and it was another auto car I was thinking of, the mk3 astra I drive.
I can't readily see any pipe.
Do you have any more info, what size is the pipe ?
I don't remember these having a vac connection in that area, if you hear a gurgling it suggests it could be a breather, but can't see why it would gurgle as shouldn't be in the oil, the breather for the gearbox is further towards the front of the gearbox, very visible a metal valve on the front steel casing.
I think it may be the PCV valve pipe, this leads from a fitting on the front of the engine behind the exhaust, which has a PCV valve in it, from this one way valve it goes to a "T" piece by the rear corner of the head on the nearside and into the inlet flange.
The purpose of this Positive Crankcase Ventilation Valve(PCV) is to allow the engine to suck the pressure out from within the engine when cruising etc, at idle the spring inside the pcv valve shuts off so the engine doesn't suck, otherwise it makes the engine run very rough and very lean, as this is extra oxygen not accounted for.
The pcv valve housing is a box type device bolted to the front of the engine, with a rubber bush in it into which the valve sits.
All your syptoms tally, best advice if you don't know your way around an engine is a haynes manual, you'll be shocked at how easy some jobs are, and save yourself loads of cash into the bargain!!
tabetha
I can't readily see any pipe.
Do you have any more info, what size is the pipe ?
I don't remember these having a vac connection in that area, if you hear a gurgling it suggests it could be a breather, but can't see why it would gurgle as shouldn't be in the oil, the breather for the gearbox is further towards the front of the gearbox, very visible a metal valve on the front steel casing.
I think it may be the PCV valve pipe, this leads from a fitting on the front of the engine behind the exhaust, which has a PCV valve in it, from this one way valve it goes to a "T" piece by the rear corner of the head on the nearside and into the inlet flange.
The purpose of this Positive Crankcase Ventilation Valve(PCV) is to allow the engine to suck the pressure out from within the engine when cruising etc, at idle the spring inside the pcv valve shuts off so the engine doesn't suck, otherwise it makes the engine run very rough and very lean, as this is extra oxygen not accounted for.
The pcv valve housing is a box type device bolted to the front of the engine, with a rubber bush in it into which the valve sits.
All your syptoms tally, best advice if you don't know your way around an engine is a haynes manual, you'll be shocked at how easy some jobs are, and save yourself loads of cash into the bargain!!
tabetha
Last edited by tabetha; Jun 19, 2011 at 07:02 PM.
Hi, and thanks very much, the pipe is the same as the breather pipe, it is connected to a box directly under the battery the hose is about long enough to reach the rear ns of the engine, no longer, will not reach the bulk head,
My email address is gwhitehead@blueyonder.co.uk, if you could send me a pic of where it goes, I will send you a diagram of the hose I have to connect.
Onjce again
Thanks
Graham
My email address is gwhitehead@blueyonder.co.uk, if you could send me a pic of where it goes, I will send you a diagram of the hose I have to connect.
Onjce again
Thanks
Graham
The breather pipe from the pcv goes to the nsr of the cylinder head, where it connects into a T piece, these T pieces are always going bad and collapsing, it's on my dads car but I'll see if I can get a picture, I have ditched the pulse air and egr so a lot more room around there than normal.
Another thing to check is the EGPDS, a silver electronic box on the bulkhead area with TWO pipes leading from it into the EGR pipes, if the cat blocks up this will cause the top pipe to get blown off.
EGPDS is exhaust gas pressure differential sensor btw.
Can you send me some pics, I have pm'd you my email address.
tabetha
Another thing to check is the EGPDS, a silver electronic box on the bulkhead area with TWO pipes leading from it into the EGR pipes, if the cat blocks up this will cause the top pipe to get blown off.
EGPDS is exhaust gas pressure differential sensor btw.
Can you send me some pics, I have pm'd you my email address.
tabetha
Thread
Thread Starter
Forum
Replies
Last Post








