Dear Sirs. In my Jaguar xk8 (engine 4,2), on computer display, when I am driving, was information "check fuel filter cap". Now the "check engine" light is on (yelow colour). Please help, what I ought to do. I am from Poland, and I have some problems with service.
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Is the check engine light displayed? If it is, that's where you start, by retrieving the fault code(s). If not, then you could have a security system fault, fuel system breakdown, etc. All codes, regardless of the systems affected, will cause the vehicle computer to immediately default to a failsafe mode, till the problem has been fixed, and this drastically affects driveability, causing no-start issues, idle problems, etc.
"Vapor lock" is a condition that occurs when fuel becomes heated to the point of evaporation. If your vehicle is truly vapor locking, it means that something hot is coming in contact with your fuel line somewhere, overheating the gasoline to the point of it vaporizing. This is HIGHLY UNLIKELY. If you truly do have a vapor lock condition, find out where the fuel is becoming heated and fix that condition.
On a 1997 Jaguar XK8, it is FAR more likely that you have a bad fuel pressure regulator or a bad ICU.
go to autozone have them scan it and then clear it record the trouble code and then clear it another option is disconnect the battery both positive and negative and make a jumper wire between the 2 terminals make sure that you disconect the battery very importan
if the coolant light is on or comes on when driving you MUST let the car cool down at lest 1 hour before doing anything, after this cool down time lift the hood [u.s.a.] or bonnet [uk] looking from the front of the car on the right hand side towards the back of the engine compartment is the coolant header tank,about 5inch square black in color [u.s.a.] colour [uk] with a large screw top and some rubber pipes coming from it,this should be topped up with coolant right to the neck of the screw cap when you remove the cap to top up the coolant unscrew it slowly as it may be under pressure you don't want hot 212F[u.s.a.] 100C [uk] coolant in your face do you.good luck.