I have checked my gas tanks and they appear not to be leaking. The car has been sitting for many years,also I had to replace the fuel pump do to rust in the tank. Now the car idles rough. Does anyone have a solution to this problem please help I am a new member LAKE3705CREST) Please respond HELP HELP HELP!

 

Lots of possibilities and you probably have a stack-up of different faults.

Fumes:
Check or, much better yet, replace ALL the fuel hoses in the engine bay. I'll wager they're all original. Don't forget the small section of hoses at the front of the cylinder head the the hoses at the fuel cooler.

Multiple fuel hoses to and from the tanks, fuel pump, etc. including in the rear wheelwells where the return valves reside.

The seals at each filler cap can shrink and allow fumes into the cabin.

In each "C-pillar" there is a fuel condensation cannister. If these rust out you get a huge fuel odor in the cabin.

Start with replacing the engine bay hoses and see what happens


Rough idle:

Need more info to help! :-)

Was all the old fuel from both tanks drained out? Did you clean the inside of the tanks? Did you replace the fuel filter? Does the engine run rough JUST at idle? Does engine temp have any bearing on the problem? Any black moke from the exhaust? How are the plugs, plug wires, etc?

Welcome aboard, by the way!

Cheers
DD

 

i had one tank leaking i had it sealed i forgot to drain the left one before using this cost me a fuel pump i think my injectors may need cleaning because it idels rough /loads up as for inlinehoses all of those have been replaced plugs wires rotor/cap is there a good injector cleaner i could use to help clean injectors here in Augusta i am having a hard time finding someone who works on the older xj6 like mine. Thanks for your info.