Punch the accelerator, engine bogs down?

Thanks for this post, I replaced the MAF sensor for $78.00 and the problem is gone! I love this site.

I have a 96 Chevy S-10 Blazer with 163000 miles. I am having a problem with the engine stumbling and getting bogged down on heavy acceleration. When it is idling the engine runs fine without any miss or hesitation. The fuel pump has about 23000 miles on it, fuel filter about 5000, and a new spider fuel injector set. It also has a new TPS, MAP, EGR, coolant temp sensor, fuel pressure regulator, crank angle sensor, coil pack, and new plugs(plugs were put in yesterday to try to cure the problem). The timing chain was changed last summer. I have been noticing antifreeze leaking out of the intake manifold gasket and I herd that could be the problem, but never got a definate answer about it. What could be the problem. Thanks in advance.

Hestitating for months. Now, will not start. Cranks but does not turn. I do not hear the fuel pump hum when I turn the key. This means full pump bad, right?

Engine Mechanical problem
1996 Chevy Blazer 6 cyl Four Wheel Drive Automatic

I have just replaced the intake manifold gasket and have it all put back together and when I start the car it sounds like it gets to much air when I accelerate. What could have I hooked up wrong?

Michael

Hi Ive got 96 S10 Blazer 4.3 motor. Check engine lite was on.I think it was a PO101 or 102.I cleaned the throttle body. Was ok for a couple days. Now has slight hestitation when first starting out in the morning. And no codes. Any ideas? Thanks Guys

I have a 98 chevy blazer. I have been scouring automotive repair websites and have seen many blazers running into this problem. When the truck is cold it hesitates badly sometimes almost to the point of stalling out it seems but never quite gets there. I just had a full tuneup and have taken it into the shop 2 times already and the mechanic cannot figure out whats going on. As soon as it warms up (About half an hour of driving) it runs great. I just had my fuel pressure checked and it read at 55. The weird thing is that the computer is not throwing any codes at all, had it scanned twice. Cleaned the maf sensor and that didnt work, also had the Idle air control valve cleaned but not replaced, thinking about the coolant temp sensor but Im not sure if thats it. Please can someone clear this up for me once and for all!

Im not sure if it changes on rev, but from what youre telling me it sounds like my fuel pump might be going bad? I just had my fuel filter replaced so that cant be it. Anything else to try before I start into my fuel pump?

Is there any kind of test I could do to make sure that my fuel pump is going out before I go spending the 300 dollars to buy a new one?

Engine Performance problem
1989 Chevy Blazer

Vehicle runs fine most of the time but suddenly will start stumbling (like suddenly lean mixture. Includes the occassional backfire in carb). I have changed the fuel filter (it acts like a dirty fuel filter) but problem will suddenly appear even now. Suggestions?

Ok, so would this be something that a weekend warrior could do or would this be a shop only deal, because I know that the pump is in tank so. I wouldnt even know where to start.