Chevrolet s10 2.2l engine issues

[jokostel]

well all, i have got a question for people here who may know what the cause to the problem i lay before you here.

first of all its a 2000 s10 pickup 2wd model w/ ~21000 miles on her.
the problem is this: when you put the gas petal to the floorboard the engine surges like the fuel filter is ristricting the amt of flow after the engine had eaten what the filter had stored in it at the time..... but that ONLY happens when your sitting in park or netural.... basically under a load the engine doesnt do this at all.
my question is this:
1 is it a fuel filter.... and lemme guess its in the dang fuel tank too??? lol
2 could it be anything to do w/ the fuel injectors @ all?

3 or what else?


what i have done recently:
replaced standard ac delco plugs w/ bosch platinum standard plugs. and new spark plug wires

i never payed attn to if it ever did it before i did all of this.... so i cannot tell you @ all if this was happening before to my knowledge at all.



any ideas or suggestions will help thank you..


jokostel

[caddmannq]

Hmmm...it's not good to rev out an engine that's not under load. In fact it's very bad. Baaaaaaaad!!!

Are you sure that there's not a governor kicking in at the computer?

It runs fine under load?

Does this have a vacuum operated fuel pressure regulator on the main fuel rail? Is the hose on really well?

[jokostel]

not sure.... dont know what the governor is set @ .... yes the vehicle seems to run fine under a load.... and i dont believe its got a vacuum pressure reg on the fuel rail ... & yup for the last q

jokostel

[caddmannq]

No, I meant the vacuum (to fuel regulator) hose. My Pontiac has one & if it comes loose the engine runs funny because the vacuum and fuel are both "off" a bit.

[Brainchild]

I'm guessing if you din't notice the problem before, it prolly wasn't there.
I would guess the Bosch plugs may be playing a part in this. If you still have the old ones, I would put those back in and see if it improves.Also check and makes certain the boots on the end of the wires is completely covering the end of the plug, and the contact is snapping down over the end as well. It could have spark jumping around outside the plug, making it act funny.But not enough to notice it under load.

If it is the plugs, take them back and get a refund.I really don't like those Bosch plugs myself.

BC

[bigblue77]

This may actually not be a problem. I know of a few differnt vehicles that do this on purpose. A few Fords do it as far back as 94 even(explorer 4.0(not all do it tho, kinda wierd)). This is done to keep you from accidentaly doing this while not under load because as Cadd stated above it is BAD for your engine.

This may not be the case with your engine, but I know some are built to do this on purpose.

Jer

[Sweeper]

It's probably a rev. limiter. As stated above it keeps you from over reving the engine. From what I read (FROM YOUR POST AND IF I UNDERSTOOD IT CORRECTLY) if you mash the pedal to the floor in park or with your foot on the brake and at idle the engine doesn't want to pull the full rpm's. Well, if that's the case, it's not supposed to. My 2002 Ford Ranger does the same thing, though it starts surging around 3500rpm's if I mash the pedal at idle. (So ya don't over rev. the engine). If your running fine under NORMAL operating conditions then don't worry about it. If it isn't surging at idle (without the pedal to the floor). Don't worry about it.