95 1500 5.7 running rough and high vibes

[dzsmith]

I have a 95 1500 5.7 z71. My transfer case shifting fork broke of for 2h and 4h. So my truck was stuck in 4l. I took it to aamco and they replaced the fork and put new gaskets seals and the whole nine yard to fix my tcase. after getting my truck back, it runs rich now. They claim they are not liable for any issues. No big deal to me, but i still have the issue. My truck idles fine, but once in drive it vibrates harder the block slightly shakes and it runs rich. I cant hear a particular miss in the motor but it vibrates and you can hear out of the exhaust a continuos tsst tsst tsst sound while sitting there in drive. I replaced the plugs, wires, d cap and rotor about 8 months ago, so it should be any issues with it. they are all connected ok. occasionally my check guage light will come on now. My egr valve is new, all my vac hoses are good, i also have a new o2 sensor. When i pop the hood with it in drive, it almost seems like the tsst tsst tsst sound is kind of coming from the throttle body injector area. I have a long trip to make this weekend and it is paramount that i get my truck fixed. also at about 55 it shakes even worse. plz help

[GMstrong]

while the truck is running check out the injector spray,you could have a clogged injector or a leaky one,also spray carb cleaner on the base of the thorttle body.

[dzsmith]

it happened all of a sudden thats whats strange, i will try what you said though

[Squirrely]

long shot here

 

you may have thrown a rocker. It's happened to me twice. The engine would idle ok, but once you hit the gas it felt like it was going to fall out of the the truck. It would shake bad, and you could really smell the gas from the exhaust.

 

but you should check for vacuum leaks and the injectors first.