does anybody out there have a engine light come on and off for a brief second with a clunk noise almost like the car is going of line for a second ?

 

You are going to need to give us more information, what year, how many miles on it, what have you checked so far, how long does the light stay on and have you had someone start the truck while you are under the hood listening for a location???????????

 

code should still be on the computer, i'd run it asap.

 

Clunks are never good with a vehicle so go to auto parts store and have them use the scanner on your truck have them print the fault code and get it back to us.

 

2003 disco 133,000 miles no codes .light flash like a half second never when its sitting
almost feels like it locking up .engine was rebuilt 8,000 ago this problem was going on before shop rebuilt engine . does this when u are coming to a stop or first thing in the am when u are going down the road .again computer does not record a fault

 

Does the oil light come on or flicker at all? I think I would take it back to the shop and let them sort it out.

 

thats what it does flicker.then a clunk then back to normal

 

engine light not the oil light

 

Yeah with out a engine code we will not be able to help much but tell you to take it to the shop that did the work for any warranty you may have? Otherwise you may lock up your motor. Cats could be partially clogged causing to much back pressure but its all guesses with out codes and we do not know if any of your leds are poked out or anything do you have a ultra gauge?and if you plug in a decent computer it still can pull up stored codes that may not trigger the light to stay on.

 

have a scan gauge still no stored codes and cats have been replaced .