1994 chevy suburban hesitates and stalls when you give it gas?

[jesse]

the idle is also very erratic and wont idle at all when first starting

 

[slipstream]

sound,s like a vacuum problem...check all vacuum line,s , sensor,s, [ that are vacuum controlled like M.A.P. sensor] , control,s like E.G.R. valve , power brake booster , etc. also consider that the catalytic converter may be starting to plug up causing excessive back pressure which will cause erratic or difficult idle. excessive carbon build up in the exhaust gas recirculation valve [E.G.R.] can cause your symptom,s as well as bad intake manifold gasket,s. other sensor,s & control,s [ such as mass air flow sensor or throttle position sensor] or faulty/dirty injector system can also cause these symptom,s. would be a good idea to change the fuel filter as well. have fuel pressure tested also....good luck!

 

[DynaFlowHum]

I would first check the fuel filter and fuel pump pressure. That is a common problem with this model

 

[zglmoo]

EGR Valve or EGR Control Module

 

[VanGo]

Sounds like vacuum. Check codes.
I don't think it's the EGR. Mine was totally dead, bad diaphragm but you would never know it from how it ran. My symptom was a Check Engine light.