Howdy all,
im scratching my head with my car at the moment. when the car is in gear and under load, there is a weird hissing noise each time im press the accelerator.
Never when its in neutral.... just when in gear.
I've checked the throttle body area and as many vacuum pipes as i can find and they all seem ok.
im more active on facebook than i am on here, thats for sure, the opinion on their is that it might be an inlet manifold gasket, however, when i look at what the typical symptoms all mention coolant loss, which, my car hasn't lost a drop.
Any idea's anyone?
Hissing under load
Moderator: Committee Members
- Tipper
- Posts: 720
- Joined: Sat Dec 06, 2008 3:39 pm
- MGF Register Region: Devon & Cornwall
- Model of Car: RV8 + ZS180
- Location: Exeter, Devon, UK
Re: Hissing under load
I don't know the immediate answer, but which model is it?
- Green Squirrel
- Posts: 515
- Joined: Sun Oct 14, 2007 9:36 pm
- MGF Register Region: South East
- Model of Car: 1996 1.8i
Re: Hissing under load
Check for leaks on the air filter and inlet - mine always makes a roar when I put my foot down BUT that is by design with a K&N filter.
Re: Hissing under load
I've got the 1.8 mpi... I've contemplated removing but the air filter box and popping a cone filter in place but it's a Nov 1995 model and I'd like a keep it close to standard as possible although I've got a s/s back box on It there's no drips coming from underneath when it's running so I've ruled out an exhaust leak
- Green Squirrel
- Posts: 515
- Joined: Sun Oct 14, 2007 9:36 pm
- MGF Register Region: South East
- Model of Car: 1996 1.8i
Re: Hissing under load
Mine is a 1995 ordered MPi delivered in 1996 which we have owned since new. I waited for the warranty period to expire before fitting the K&N cone. The box can always be refitted !!
- paul_mgb
- Posts: 58
- Joined: Sun Nov 06, 2011 3:14 pm
- MGF Register Region: Midlands
- Model of Car: MG TF 135
- Location: Bromsgrove
Re: Hissing under load
My daughters TF, used to make a whooshing noise under load, it also didn't go as well as it should have done. This was following a Head Gasket Failure. It turned out to be a faulty stepper motor/idle speed control valve (the cylindrical thing attached to the inlet manifold). I swapped it for a second hand one and the problem went away.