1998 Jaguar xj8 sport 48000 miles on clock, stood for a while in winter and battery went flat and remote wouldnt work, charged battery up, remote still wouldnt work so changed batteries as recommended in hand book, still wont work and car though turning over wont start, had no problems to this any suggestions

Security is set. Could be one problem. Fuel system can do this, but rarely. Takes a scanner to see where to look first.

Jaguar wont rev 3000 rpm Questions & Answers - Fixya

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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 ...

Jaguar engine cuts 3000 rpm Questions & Answers - Fixya

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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.

Rev Won't go up

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check your owners manual/log books etc for the 4 digit code.previous owners if any would have written it down somewhere.you have 3 attempts before lockout.if this occurs disconnect battery again

could be a weak battery. they tend to make electronics go haywire when there is less than desirable charge left on a battery.

I had a similar problem with my Lexus. I went to Lexus and they re-programmed it. Somehow it got corrupted or lost the code. This may sound stupid but are you sure it's not the batery? Is it the glow type?

Go to Datamanuals.com, download the manual for the car there! although you have to pay for these! the manuals are the actual manufacturers guides and diagnostic tools!

Hope this helps!

fill with 5 gal of fuel, check fuel at motor , looks like tire valve, cover with rag and let evaporate if any comes out before starting 

the fob should come apart in two pieces front and back look for a indent on the seam os the two parts if you find one a flat head screw driver will do the job put it in the indent and twist do not pry twist

I know what the problem is but never tried to resolve it. I have a 1998 XJ8 and went through the same problem. After numerous attempts to program the 4 channel built in opener I researched the problem and learned that the system in the car actually changes the code after every use. It's a security feature built in to the system. I simply started keeping my remote in the car.

There must be a way to disable the automatic randomizer so it retains the code from your remote opener everytime. Check with the dealer to see if it can be disabled and you will be in business. Please post the info if you get it.

Good Luck!