Question:
I bought the car with a passion for Jaguars but can't really afford to run the cat. I'm hoping the misfire is something that can be fixed with a little advice. Being a petroholic, the Jag doesn't get much use, so after a week of being cold, she takes about 15 minutes of running to be rid of the misfire. The sound of the misfire is only slightly 'lumpy' so maybe there are even eleven cylinders firing. The London freeze isn't helping things! Please help !!!!
Answers:
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Back in the days when i worked for a jaguar dealer we had this a few times and we had a procedure we followed to cure this forst we would replace the plugs leads and cap as a matter of course, this cures it 99% of the time the other thing is that on this injection system it relies on water using a fasd unit (fully automatic starting device) this is a bi metalic strip that allows extra fuel to be sent to the cold start injector which acts a bit like a choke mechanism to check all this you need to find a dealer that still has the epitest equipment which would be rare theses days unless you can find an independant jag specialist, hope this helpsHow can I open the hood of my car if the lever won't work?
have u checked the spark plugs are ok and on in the right order?Could just need a tune up..... sounds like sparkplugs, does your car use a distributer cap?
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probably needs a tune up you know new plug wires distributor cap ect and then perhaps also you are using to low an octane rating fuel for the jaguar and then maybe it has some water in the fuel as well.Why can't I put mor than 5 gallons of gas in my '88 Nissan 300Zx??
First check the timing, then the plugs and then the wires and then the fuel filter. All of these can cause a miss. The roar of the cat might be the timing if it is the V-12.If the brake pads were so worn down the rotors were damaged -how much wuold that cost to repair?
It could be dampness getting around your plug wires. Lift the hood at night when it is running rough and look for sparks around the plug wires. They often leak near their boots or where they cross. It could also be a bad fuel mixture from a leaky vacuum hose, or a bad air filter. One way that I have used to check for damp wires is a product called W-D40. I don't know if you have it by that name. It is a silicone lube spray that displaces water. It is nonconductive. If it is moisture on the outside of the plug wires spraying with W-D 40 will get rid of the moisture. If that ends the problem then you know it is from the wires. Another simple check is to inspect the plugs. If they are dirty or worn that might be the problem. plugs are fairly cheap to replace.The fact that you mention the chilly weather makes me think it is moisture condensing on the wiring.
Engine oil flush and change the filter. Check the HT leads, cap and rotor arm. Then go onto the fuel system checking for fuel leaks etc..
This time of year is no good for any car. If in doubt get it checked out, you might save some money and fuel in the long run when it's running like that.
Take your dizzy cap off and clean contacts with a small piece of emery paper then wipe out with kitchen towel or tissue make sure you replace it properly and dry HT leads why your there
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Buy new plug leads. I had one before and it ran rough as a badger 'til warm then it wasn't too bad. A good test is to remove them overnight and dry them on a radiator then use WD40 on them to expell any remaining damp. Refit and see if any improvement.Plug leads deteriorate then soak up the damp and you'll never get them to return to their showroom-like efficiency without renewal.
If you're doing this but new plugs. To not do this is false economy.
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plugs or plug leads!if it has a distributer could be cap?
good lock merry x mas
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A lot of people on here have suggested nearly every thing you could check yourself without going to a garage, the other thing you could try is using injector cleaner for the fuel injection system in case you have clogged injectors it is very easy to use you just pour it in your tank when you fill up with petrol.More Questions & Answers ...
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