If it's a ralley dash the IVR is ingegrated into the fuel gauge. If it's bad you will have to build a solid state replacement. Simple to build from a 7805 IC available at Radio Shack.
Well I'll be go to hell dgc333. I've heard of using that Radio Shack chip for a limiter instead of the old plug in. I thought both dashes used the plug in limiter. See what I mean, 50 and still learning. I'll have a look around cause I came across a site that showed the how too's for the radio shack chip. :notworth: