3.4 Stuttering/Hesitation

[equalizer]

Okay, a bit of a mystery here. I have a sort of a stuttering in almost every gear, throughout the RPM range. I have replaced my Plugs, Wires, Coil Packs, and my ICM. I dont have any clue what it could be.

I drove around with a fuel pressure gauge attached, and fuel pressure remains constant at idle, and jumps up when I accelerate like it should. So fuel pressure is fine. I also replaced the fuel filter, so flow is good as well.

I'm at a complete loss. I cant tell what it is, i've done everything. The car seems to idle good, right where it should. lol. Any help you guys can give would be awesome. Thanks.

-- Mike

[ July 30, 2003: Message edited by: equalizer ]</p>

[camarofan]

injectors? bad tank of gas? intake/exhaust leak, restricted cat?

Know anyone that can hook it up to a scanner to check sensor readings and possible misfires, new doesn't always mean good

[ July 30, 2003: Message edited by: camarofan ]</p>

[3400Camaro]

i seem to say this alot but, injectors? Check the plugs, and see what they look like. I just don't want too see you go through what i did, $1000 in tinkering and no fix, till i finally stumbled across it.

[BadLiLBowtie]

try a tuneup and fuel injector cleaner ;)

[ August 02, 2003: Message edited by: BadLiLBowtie ]</p>

[NiCeBiRd6]

i have a similar prob. with my car. I have had the wires, injectors, fuel filter, plugs, and coil packs tested. One of the techs at the dealership told me it might even be a weak valve spring. I have a feeling he is right. I put lucas upper cylinder lubercant in and i dont get a miss for about a few weeks. and then its back again. This is just one more idea of what it could be.

[RAR]

I had the same problem except it was only under load - it ended up being one of the coil packs... it tested good, but when it got hot it would short out sometimes.

Other then that I think I would try the fuel system - injectors, pump, filters, etc...