[Lyle O]

So you are saying that the new solid state relay makes the car run like it's on "a few cylinders", same as the one which burned out shown above (and in the other thread)? FWIW, I have been using the solid state relay (with pump prime) for at least 4 years, and my cars runs perfectly on it. As mentioned by High Life, perhaps there is something else going on. You should try the test Grant mentions above to be sure (jumper).