i pull the 3rd and 4th injector plugs out and nothing happens, but when i pull the 1st and 2nd one out the car shuts off. what's wrong with my car?

 

Running on 2 cyls?

 

if the idle does not change at all when you pull an injector plug then that cylinder does not work!!

 

bump i got the same problem car runs on 1 and 4 only ( the ones closet to the dizzy and the one closets to timming) the two in the middle are not doing anything. I pull the injectors connectors and they the car run the same. Pull the #1 or #4 and the car starts to stumble. I check the injectors for ohms, it was about 12-12.5 ohms on all four including the middle 2. Check the middle 2 connector's harness about 13 or so volts.

i am guessing the injectors are stuck and still allows fuel to get into the cylinder. But it is odd for 2 injectors to fail at once. Anybody got any input?

 

Have you done a compression test? Sounds like you could be running on 2 cylinders.

 

it does seems to be running on 2 cylinders, how will a compression test prove that its alright? what are the possible conditions that can be wrong if the compression is not right? Bad rings? bad seals? bad valves?

 

....................................or tell you you have a blown head gasket!!!

 

A BLOWN HEAD GASKET ohh nooo lol let me just end that. But regardless, i found the problem. The spark plug wires was swapped between 2 and 3 so the timing was off. So whenever number 2 was suppose to fire, number 3 was and vice versa and fuel was not shooting at the right time for combustion. In conclusion, check your spark plug wires for the right order. And do what i did earlier, Check the connector for voltage, then check the injectors for ticking by using a screw driver and listening to the injectors. if injectors and spark is good, then do a compression test.

 

depending on the engine, dseries usually burn holes in the valves, hence making a misfire or a dead cylinder..that or you have bottom end damage, bad plugs, or bad wires, but im puttin my money oon the valves having holes in them