What is your question?
I have a 1996 G10 van with a 5.0 engine. Currently, the van idles rough; it seems more evident when warm. I would not say that it is idling erratically, but rather is a little loud and shaky. There is no check engine light on, and recent work includes PCM replaced, replaced catalytic converter, replaced intake manifold gaskets, air and fuel filters replaced, spark plugs, wires, and distributor cap replaced, MAF sensor replaced, and throttle body and EGR valve cleaned.
I took it to a mechanic (to resolve more severe driveability issues) and he said that the fuel volume was erratic when the van was warm, but the pressure was fine. He suggested I needed a new fuel pump and filter.
I took it to another mechanic, and actually figured out that the earlier issues were (somehow) the result of a loose battery cable. However, the van still idles rough. Thus my question is as follows:
What else could cause the fuel volume to "all-over the place" as opposed to the fuel pump itself? The reason I ask is that the van does not appear to exhibit the "typical" symptoms I associate with a faulty fuel pump. That is, after fixing the battery cable, it does not have trouble starting and does not hesitate notably under acceleration. Like I said, the van's most evident fault now is a rough idle, and I would presume it would need less fuel at this point. I suppose this could mean that it is receiving too much fuel, but I thought such might be more likely the result of a faulty sensor than the fuel pump itself.
Thanks for any help.
What makes this problem better or worse?
It seems worse when the engine is warm
