88 4.3 stutter when hot and accelerating

[spasticone]

I got this van after it sat for around a year. At first it ran great all the time and then it developed a minor miss at idle only when it was in gear at a stop and up to temp. The miss has become a bad stutter when it's hot at acceleration. It's worst when your's going from a stop or going slow and push the gas a little. If you punch it it will smooth out, but it will continue to repeat this after only a few secs. I have noticed it will stop a bit from time to time, but it may just be how much I'm accelerating.

So far it's had a used egr, and top half of the throttle body.
new plugs, cap, rotor, pcv, and a ton of injector cleaner.
What are some ideas.. It's so wierd that its only when up to operating temp. When you first start it it's golden. PERFECT idle, awesome acceleration. I really need to direction on this so tia for any help.

[ericn1300]

try an alchol based gas dryer like STP. you might have water in the gas tank.

[old_master]

Possibly a bad plug or plug wire. Try directing a mist of water over the plugs, plug wires, and ignition coil with the engine idling, (at night so you can see if there are any stray sparks flying around).

[spasticone]

First off.. thank you so much for the responses. I found today that if it is up to temp, in drive, and I hold the brake, it will miss untill I spray ether around the egr area. I may be crazy, but I'm pretty sure this is the case... So... Thanks to my multiple parts of headsets, I replaced the erg gasket.... no change. I then replaced the tb gasket and spacer gaskets (air filter) and thought I had it... no change. I'm gonna replace the fuel filter... I never did.

I'll add some dry gas tomorrow and plug wires are next on the list, but the ether thing makes me thing pump or f filter. the outher thing I have been contemplateing is the intake gasket... I dunno... advise away... I really need to fix this up as I have baby # 3 on the way in 3 weeks and need the van. Thanks in advance. --Kris

PS. New plugs about 50 miles ago... I'll try the water thing tomorrow. I haven't been able to source a spray bottle.