2004 xjr, cap tightens and stops, does not continue rotating and clicking. Is this normal?

 

Should be clicking several times

 

Thanks Petz, I’ve ordered one off of Amazon, keeping fingers crossed no more 442 and 456 codes

 

Evap issue... ok worth a try. I changed an o-ring on the 4.2 na at the throttlebody entry and I pressed the connection near the strut the hose coming from the evap system in the left wheel well

 

I have ordered 2 OEM Jaguar gas caps for my 2004 XJR and neither of them click they just tighten down. I thought that was just a Jaguar thing but wish they would click to confirm the seal.

 

I took off the purge valve, in the left front wheel well, couldn’t blow thru it, hooked it up to 12 volts and it opened I could blow thru it. I can’t hear any hissing, I’m at a loss if it’s not the fuel cap . I’ve put so many hours into this car to bring it back and now this dh$t! The charcoal canister is buried up above the differential.

 

where did you get the O-ring. Can you show me a picture of the O-ring

 

No . Have a look where the hose enters the back of the throttlebody . There's a O -ring inside

 

New cap doesn’t click either, just tightens down after 1/4 turn. Still getting 442 and 456 codes, I’m going to have to bring it to someone.