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2000 Chevy Express van engine hesitation


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I own a 2000 Chevy Express 1500 van with the v6 engine and 211,000 miles on it. After a cold start the engine will often, but not always, hesitate the moment I press the gas pedal to take off. I have to back off the gas and feather it for a few seconds before the engine fully engages. This also occasionally occurs while stopped at a red light/stop sign with the engine warm.

Any thought as to why it does this?

Did you scan for any codes?

2 Answers

Sounds like either a clogged fuel filter, weak fuel pump, or a dirty MAF sensor.

I would check your filter and, if it is ok, move on to cleaning the throttle body and MAF sensor. Here is Scotty's video on that:



If it is still stumbling after that, I would have the fuel pump pressure tested.


Thank you @inthrustwetrust.

So that would be the Vortec 4.3L V6 with distributor ignition right?


I agree with @Mod_Man ... those are classic signs of poor fuel pressure. You easily test that with an inexpensive pressure gauge on the fuel rail. Hopefully it's just a clogged filter. If not, then you have to drop the tank and change the pump. Or if you're handy, do what a lot of people do and cut an access hatch.


If it hasn't been done in a while, it would hurt to give 'er a tune up with fresh plugs, wires and dizzy cap, and make sure it's clocked correctly. A diagnostic scan tool can give you an instant ignition retard reading.


Another quick and easy step for peak performance is to inspect your intake. Make sure air filter is clean, throttle body not all gummed up, and spritz of cleaner to the MAF sensor.

Plus one here for adding an access hatch. Will make life MUCH easier in the future.

Thanks for all the great advise.

Wish I'd known about the access hatch idea before I soundproofed, insulated, and put in a subfloor and new carpeting...LOL

Well hopefully you'll only need to do the procedure once and for the last time (if it IS the pump. Check first)

Check out the forum in my signature. Lots of helpful people there.