Ωhm Posted November 16, 2018 Share Posted November 16, 2018 I think all you're doing is taxing the pump harder (loss of pump life) and just pumping more fuel back through the fuel return line to the tank. No broken ballast excuses, just carry a small jumper wire in the glove box. Link to comment Share on other sites More sharing options...
omega_rugal Posted November 16, 2018 Share Posted November 16, 2018 you can get a few more miles out of a dying pump bypassing the resistor... but yes, bypassing the resistor should be the exception not the rule Link to comment Share on other sites More sharing options...
Ωhm Posted November 17, 2018 Author Share Posted November 17, 2018 True, the dying pump can always use a good shot of voltage. Link to comment Share on other sites More sharing options...
HOrnbrod Posted November 17, 2018 Share Posted November 17, 2018 2 hours ago, Ωhm said: I think all you're doing is taxing the pump harder (loss of pump life) and just pumping more fuel back through the fuel return line to the tank. For sure. But tell that to the geniuses who say the resistor is only there to cut down pump noise and so they bypass it. These people either love changing fuel pumps prematurely, or have stock in Bosch. Link to comment Share on other sites More sharing options...
Eagle Posted November 17, 2018 Share Posted November 17, 2018 The ballast resistor was introduced in the 1988 year for the purpose of reducing pump noise. The 1987s didn't have it. Link to comment Share on other sites More sharing options...
cruiser54 Posted November 17, 2018 Share Posted November 17, 2018 9 hours ago, Eagle said: The ballast resistor was introduced in the 1988 year for the purpose of reducing pump noise. The 1987s didn't have it. Correct. How many other vehicles run pumps without resistors. Link to comment Share on other sites More sharing options...
Ωhm Posted November 17, 2018 Author Share Posted November 17, 2018 So people bypass the ballast only to make their pump noisier. But in doing so, they tax the pump (pump life) and just pump more fuel back through the return line to the tank. That's my point. WHY? Link to comment Share on other sites More sharing options...
HOrnbrod Posted November 17, 2018 Share Posted November 17, 2018 Because they have existing fuel delivery problems, like a dirty filter, low fuel pressure, bad injector(s), low idle, etc. etc. and think bypassing the resistor will speed up the pump and cure all their problems. Link to comment Share on other sites More sharing options...
87MJTIM Posted November 17, 2018 Share Posted November 17, 2018 1987, no ballast resistor, original pump, 300K. What's the problem with bypassing? Link to comment Share on other sites More sharing options...
omega_rugal Posted November 17, 2018 Share Posted November 17, 2018 Just now, 87MJTIM said: 1987, no ballast resistor, original pump, 300K. What's the problem with bypassing? nothing, but apparently the pump is toooo noisy for some... Link to comment Share on other sites More sharing options...
gogmorgo Posted November 17, 2018 Share Posted November 17, 2018 I like noisy fuel pumps. At least I know they're doing something. Link to comment Share on other sites More sharing options...
omega_rugal Posted November 17, 2018 Share Posted November 17, 2018 Just now, gogmorgo said: I like noisy fuel pumps. At least I know they're doing something. my words exactly, that way i know if it´s getting power... Link to comment Share on other sites More sharing options...
HOrnbrod Posted November 17, 2018 Share Posted November 17, 2018 4 minutes ago, omega_rugal said: my words exactly, that way i know if it´s getting power... the only quiet pump is a dead pump. Link to comment Share on other sites More sharing options...
gogmorgo Posted November 17, 2018 Share Posted November 17, 2018 Depends on how the pump dies. Mine was making noise when it was dead, even with the ballast resistor in the loop. It just was worn out and wasn't pumping worth a damn. But because it was making noise I knew it wasn't an electrical problem. Link to comment Share on other sites More sharing options...
cruiser54 Posted November 21, 2018 Share Posted November 21, 2018 I've not ever had another vehicle with an in tank electric pump that used a ballast resistor. If you read the bulletin I posted closely, in the first sentence they state it's more prominent in some XJs than others. Likely it's the design of the fuel tank mounting? Skid plate? Some reason our vehicles transmit/amplify the noise? They used the resistor until they went to a returnless fuel delivery system. 96 or so? All mine still have the resistor installed. Bypassing it is a quick way of testing the resistor I guess. Anyways, it was for noise. We installed quite a few of those kits at the dealership in the early years. Link to comment Share on other sites More sharing options...
HOrnbrod Posted November 22, 2018 Share Posted November 22, 2018 This guy never ceases to amaze me with his dumb-down vids.... Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now