Two months ago I gave my friend a ride home to lake Geneva, I live in Trevor so I was excited to drive him there. (I LOVE driving my blazer) I was 1 mile away from his house and my baby died out. I couldn't get it to start for a month and a half after that. It would start if I spray ether in the air intake so I knew my ignition was good. I replaced everything I could think of to get it running including: fuel filter, fuel lines, fuel pump, fuel injector, but nothing worked fuel just wasn't getting into the cylinders. I didn't know what to do, finally I had a friend tell me that the fuel pump I replaced was faulty so I bought a new one and sure enough after what felt like hours of priming the blazer finally turned over I was extatic to say the least. Then after driving it for not two days I started to have idle problems then the problem got progressively worse to a point now where it shudders out when I try to brake (obviously this is rediculously dangerous) so once again I got back on the forum for anybody with my same problem. I replaced the throttle positioning sensor thinking that would work, nothing it still stalled out. I got my alternator tested to see if maybe it wasn't putting out enough power at low rpm. The alternator was good, I just finished cleaning out my EGR valve thinking that would do something but nothing again. Someone please help me diagnose this I just wanna drive to work and back without stalling and crashing. ps my. heck engine light is NOT on.

 

Sorry for the incorrect spelling on some words I'm typing on my ipod and mr spell check misinterprets my words.

 

Maybe run a vacuum test ? The brake booster is run by engine vacuum.

 

Try the search button on the main page. Are you sure it's dieing when you brake? or could it be doing it when you let off the gas pedal?
It has to be a vacuum issue. Agreed with george

 

Come to think of it I did take a vaccume hose off while the truck was running and the idle droped a good 150 rpm each time I plugged it with my finger. Il run a vaccume test and then post my results.