In neutral, there is no load........ the engine doesn't have to do any real work to rev out. Now, when it is trying to accelerate that 5000 pound brick, THAT is a load.

 

But even if there is no load, wouldnt it still have the vaccum (pleneum gasket) or still be clogged (cat)? Thats wat i dont get

 

If it is due to a vacuum leak, yeah, the leak will still be there. The difference is, engine load. Under no-load conditions, revving in neutral, it doesn't take near as much gas for a burnable mixture, aslo, the PCM sees that the trans is NOT in gear, and takes that into account as well.

Under load, lots of things change...... and a marginal 'fire' under no load conditions, becomes a miss.

 

Ok cool learn something new everyday. Ill check the gasket when i get home tonight.

 

So i checked the gasket and its all good, dry. So idk wat you thinking now?

 

Compression test.......

 

compression? How so?

 

Need a compression tester.... Low compression on one cylinder can happen for a variety of reasons, and might give a hint of what is really going on. You can rent the gauge from the parts store, and it is fairly easy to do. (easier if you have a friend help. all they gotta do is crank the engine five or six times on each cylinder, while you watch what the gauge does, and then move it to the next cylinder.)

 

well i pulled the plugs to take a look and they look a little hot/lean. i did replace the cam position sensor cuz a buddy told me they go all the time. didnt work. i just noticed today that from a dead stop to WOT it hesitates a lil then goes. my air/fuel gauge is reading right where it should i beleive. 14.6-15.0 idol to 11.7ish at WOT. any suggestions now?

 

Refresh my memory a bit, how old is the cap/rotor/wires? What are the plugs gapped at? and how old are they??