Although if I drive it barely pressing the gas, I can get it up to 80mph. Just not able to half throttle or floor it, it bogs down. I have tried replacing a bunch of sensors all around the engine, cleaned the throttle body and even disconnected the catalytic converter, acceleration consists of the same. What am I missing here?
New computer
Testimonial: "it wasn't doing it before the cylinder head replacement. Would you think it would still be the computer? PCM?"
SOURCE: bogging and hesitation on acceleration iddle is fine
You definitely covered most of the bases. Considering all you've done so far, I would check into the fuel system next. First, how old is the fuel filter? Has it been changed? Yes, a bad filter can cause the problems your having. Next would be the fuel pressure regulator. You need a fuel pressure gauge to check it, which you should be able to rent from a good auto parts store. That will also tell you how good your fuel pump is, i.e. if the pump can deliver the necessary fuel pressure off idle. After that, I would check the injectors themselves for wear or blockage. A bottle of fuel injector cleaner in the gas tank would be a good idea, cheap, quick, and it wont make anything worse. If all that checks out, check your catalytic converter, a clogged or bad cat will also do what your describing. Good luck.
SOURCE: 2000 silverado 1500 4x4, after driving 15-20 miles
Fuel filter, plugged exhaust (even though you replaced the Cat), low compression, low fuel pressure, valve timing, MAP Sensor? Seems like it's temperature related if you can go 15-20 to start with then only 3 after that...
SOURCE: When I put the gas peddle to the floor the engine
ignition timing incorrect or not operating properly
SOURCE: truck bogs down when trying to accelerate.
Check the EGR valve by unplugging the vacuum hose and plug the hose with something
could be the catalytic converter, very possible on a 1993.
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