Many thing can cause this. Some of the more common causes are: Lambda system non-functional-If you don't hear a loud buzzing from the frequency valve on the right side valve cover you probably need a new relay to get the lambda running. Dirty or plugged up fuel injectors-must be removed, cleaned, and tested Vacuum leaks-The hoses are old, stiff, and cracked or maybe just fell off a fiting. If the mode switch is hissing you know that at least that is one of your leaks Control plunger sticking inside fuel metering unit-Dissasemble and clean Dirty or stuck pressure regulater-Clean or replace Dirty fuel filter- Replace Suction hose in fuel tank kinked or collapsing-Get in the tank and replace all questionable parts and be very careful when reinstalling the fuel pump. If you turn it while reinstalling you will kink the pick-up hose. A break-down of the insulation in the Secondary Ignition System. If when installing the new ignition wires you streched one you broke the inner core. An improperly gapped spark plug or a cracked or defective one. I have given you a lot of things to look at but without further testing it is really hard to decide if the problem is fuel or ignition related. David Teitelbaum vin 10757 --- In dmcnews@xxxx, "millstuffs" <stonemll@xxxx> wrote: > CAR HAS BEEN IN LONG TERM STORAGE [mice got into the relay department > and skinned a few wires---I repaired the wires with electrical tape > and they appear to be OK.] Recently, I installed a new fuel pump > system in the gas tank, a new rebuilt A/T transmission computer - > governer and new spark plugs. It still seems to LOAD UP when I try to > accelerate and on steep up-hill grades it nearly slows to a stop! > Could my problem be with the RPM fuel pump relay? Any suggestions > would be appreciated! JIm Smith