If anyone has ever had this I would like some advice/pointers. Recently my xj6 series 3 1982 would start and idle for 10 mins then die. After that it would start everytime but then die right after. I left the car alone and it would do the same thing the next day. Theres a new fuel pump, filter, alternator, battery, spark plugs, and volt regulator. This morning I started it up and it ideled fine and instead of it usually giving out the rpms fluctuated and it wanted to give out for about 5 secs then returned to normal. A couple hours later I was able to drive to the store about 3 miles away and back with no problems. I do notice a problems with the return/send valves as one tanks appear to be more fuel than what originally was. Could this have anything to do with it. In the meantimes I did put iso heet in each tank. Could it just be something in the gas finally burning off?

 

Could be many things and there are many jumping-off points where you can begin your search for the cause of the problem(s).

One of the many things it could be contaminated gas, as asked/answered in the other threads. As suggested 2-3 times before in other threads, take the gas filter off and pour the contents into a clean jar. This very easy and zero-cost step may very well tell you all you need to know.



Cheers
DD

 

Yea I was going to take apart the fuel filter but was short on time today. Im off tomorrow so ill take apart the filter and drain the tanks and give ya the results I find. Thanks for your help and responses

 

I had the same problem with mine.
I discovered that it was the engine compartment wiring harness.
The wiring coming from the distributor was shorting on the engine block.