Multiple Cylinder Misfire

[kjlegend]

I'm having similar issues. I just had the fuel pump replaced and since then its ran like this. I'm assuming its a hose from/to the fuel pump...

 

[kjlegend]

Well I'm replacing the spider injection system tomorrow.. I'll post my results.

 

[stroutman]

well I tried the seafoam but with no improvement in my problem. I am going to look into the fuel regulator and catalytic converters. Thanks for all your help. Will keep you posted on the progress

Yup, sounds like mine. I've done plugs, wires, Seafoam and fuel pump and still shakes like crazy when I have to get my foot in it... like yours it happens to me going up steep grades or passing on interstate. If I let off accelerator, it quits but I slow to 50 mph or so. It has driven me nuts, so if you solve, please post!
Thanks,
Scott

 

[kjlegend]

FIXED!!!

Check your spider injection system. I just swapped mine out and it runs soooooo nice!

 

[vanilla_gorilla312]

My spider injection system was replaced about two years ago. Would it go out again so soon?

 

[kjlegend]

That would depend on whether you replaced it with a OEM brand new one, or a used or off brand one.. Otherwise I'm not sure how long they are supposed to last.

I would probably search elsewhere first if you recently replaced the spider system.