engine
 

I have a 97 four-wheel blazer when I started it and put it in drive and give it gas it dies on me. Does anybody know what might be causing that?

could be a lot of things, any more symptoms?

It has no problem idling when I step on the gas it dies

have you checked all the connections to the air intake? fuel pressure?

My check engine light came on. Po155 Do you think that has anything to do with it

prolly not a cause, but maybe a symptom of the issue

P0155 Code... - S-10 Forum

Better yet, take a look at our own thread.
P0155 Explained

Will it idle in gear fine? Also, can you rev up the engine in neutral? Basically, does it die only under load, or any time the throttle is opened?

When I start the car. It revs up to about 3000 by itself and then goes back down and when I put it in drive. It runs for about 3 4 seconds

Have you checked the Idle Air Control (IAC) and Throttle Position Sensor (TPS)?