1998 xj8 heater only works when engine at higher revs
I have a xj8 that the heater only blows heat when you are driving the engine under load.....when you stop at lights or junction etc the air blows cold...pull away and its hot again...any suggestions....could it be air locked or auxillary pump?????also drivers check strap broke is this an easy job cheers
An expert who has achieved level 2 by getting 100 points
An expert that got 5 achievements.
An expert whose answer got voted for 20 times.
An expert who has written 20 answers of more than 400 characters.
Re: 1998 xj8 heater only works when engine at higher revs
There is an Electic Water Pump for the Heater that is located under the hood near the left fenderwell. If it's not a fuse, then likely, this pump is bad. Mine went bad in my 1999 Jaguar XJR. It runs close to $400 for the pump, so hopefully that's not the problem. Price does not include labor.
Since I'm comfortable with Electronics, I replaced the brushes in my motor and it works fine now. Heat all the time and only cost $1.00 You may be able to find a shop to rebuild the motor for you at a fraction of the cost.
a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US. click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need. Goodluck!
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
1998 Jaguar XJ8 won't rev over 3000 rpm ... Wont go beyong 3000 Revs s type 2001, wont go beyond 3000 Revs and it' in limp ... Question about 2002 X-Type ... My jaguar xjr8 year 2000 battery went dead started car went for short drive back ...
www.fixya.com > Forum > Tags > engine cuts 3000 rpm
1998 Jaguar XJ8 won't rev over 3000 rpm ... engine cuts out and shudders at 3000 rpm won't accelerateobd code p0332 2002 jaguar x type 3.0 l P0332 - Knock ... Car is boging out in park and will not go over ... driving, don't worry about it.
I got similar problem on a 1998 XJ8 a few weeks ago. It turn out to be a dead auxiliary coolant pump. This is an electric pump that help pumping the hot coolant into the heater core when the engine is at low revs. The main engine coolant pump is not sufficient to provide enough coolant throughput to the heating system on some cars, so a auxiliary electric pump is required. If this is your problem, you might still get a little hot air when driving at high speed. If this is your problem and are a do-it-yourself, you can even save the price of a new pump by just replacing the auxiliary pump carbon brushes. They are most likely completely worned after 13 years of service. My brushes have a 4x4mm section, yours might be different. If you do not find exact size, carbon brushes can be cut and/or sanded to size.
That seems pretty normal, the heater works by blowing excess heat from the engine coolant. So the coolant has to be warmed completely for the heat to work, you can get a heater that plugs into your cigarette lighter that will heat the vehicle instantly.
3 possibilties(1) Bad secondary water pump motor.Its located on left side inner fender by firewall under hood.The pump looking thing with 2 heater hoses and 1 cable connection (2) heater valve near secondary pump, 4 hoses 1 electrical connection.Power on to shut water off to heater. (3) blocked heater core.
Sound like you have a plugged heater core. But two things you need to check first
1). is there any air in the cooling system. Check this by removing the radiator cap when engine is cold and vehicle is on level ground. Is the radiator level all the way to the top? If so...
2). Check to see if your inside heater/cooling doors under the dash are working properly. If so you most likely have a partially plugged heater core.