macattack Posted July 14, 2023 Share Posted July 14, 2023 (edited) Noticed for last while my 96 mr688 turns over quite a bit before starting. This only happens approximately once per month. When truck starts it operates fine, but every once in a while it spins over quite a bit before starting. Truck has air throttle. Anything I can look for. Gonna check for leaks and loose fittings. any o rings that I should be aware of on the pump that usually cause the issue I am having. There is a plastic line that goes between the pump and the engine. This line comes from the driver side of engine goes in-between the pump and engine and then connects to the rear top of pump I believe its called the android. Does it connect anywhere on pump before it goes to the android. Can't tell because it goes behind the pump between engine and pump Any points or tips would be helpful. Thanks Edited July 14, 2023 by macattack Quote Link to comment https://www.bigmacktrucks.com/topic/73053-96-mr688-hard-start/ Share on other sites More sharing options...
Joey Mack Posted July 14, 2023 Share Posted July 14, 2023 (edited) Does it have a hand primer? If so, maybe next time it doesn't start right up, stop cranking, and pump the primer til it's firm and crank it.. Edited July 14, 2023 by Joey Mack Pore cell fone sperring Quote Link to comment https://www.bigmacktrucks.com/topic/73053-96-mr688-hard-start/#findComment-534831 Share on other sites More sharing options...
macattack Posted July 15, 2023 Author Share Posted July 15, 2023 Don't think i see a hand primer. Where would it be located? What does it look like? Thanks Quote Link to comment https://www.bigmacktrucks.com/topic/73053-96-mr688-hard-start/#findComment-534853 Share on other sites More sharing options...
Joey Mack Posted July 15, 2023 Share Posted July 15, 2023 on the side of the injection pump Quote Link to comment https://www.bigmacktrucks.com/topic/73053-96-mr688-hard-start/#findComment-534854 Share on other sites More sharing options...
Joey Mack Posted July 15, 2023 Share Posted July 15, 2023 something like this.. fuel lines are attached to it.. Quote Link to comment https://www.bigmacktrucks.com/topic/73053-96-mr688-hard-start/#findComment-534855 Share on other sites More sharing options...
macattack Posted July 15, 2023 Author Share Posted July 15, 2023 Thanks. I will take a look. But I can't recall seeing it. Thanks again 1 Quote Link to comment https://www.bigmacktrucks.com/topic/73053-96-mr688-hard-start/#findComment-534868 Share on other sites More sharing options...
macattack Posted July 15, 2023 Author Share Posted July 15, 2023 Found this pic online. I believe i may have leak at this fitting on the side of pump. I got this pic online and my pump seems to be leaking at the fitting pictured with the zip tie. What is this and can it be fixed without removing the pump? Thanks Quote Link to comment https://www.bigmacktrucks.com/topic/73053-96-mr688-hard-start/#findComment-534887 Share on other sites More sharing options...
JoeH Posted July 15, 2023 Share Posted July 15, 2023 Looks like leakoff lines, easy fix. The plastic tubing gets old and starts splitting, which introduces air into the fuel injector lines. Quote Link to comment https://www.bigmacktrucks.com/topic/73053-96-mr688-hard-start/#findComment-534915 Share on other sites More sharing options...
Joey Mack Posted July 15, 2023 Share Posted July 15, 2023 fuel return......... primer is on the other side, or should I say lift pump, hopefully has a primer Quote Link to comment https://www.bigmacktrucks.com/topic/73053-96-mr688-hard-start/#findComment-534916 Share on other sites More sharing options...
macattack Posted July 16, 2023 Author Share Posted July 16, 2023 Don't see a primer or lift pump Does that fitting with the tieback have a o ring? Would that be a banjo fitting? Only issue is that the fitting faces the engine and very little space in between. Hopefully I won't need to remove pump to gain access. Thanks Quote Link to comment https://www.bigmacktrucks.com/topic/73053-96-mr688-hard-start/#findComment-534956 Share on other sites More sharing options...
Joey Mack Posted July 16, 2023 Share Posted July 16, 2023 should be able to remove the fuel lines (as sets) then sneak back there to fix it.. Quote Link to comment https://www.bigmacktrucks.com/topic/73053-96-mr688-hard-start/#findComment-534957 Share on other sites More sharing options...
Joey Mack Posted July 16, 2023 Share Posted July 16, 2023 see the black plunger?? that is the lift pump with a new primer pump.. Quote Link to comment https://www.bigmacktrucks.com/topic/73053-96-mr688-hard-start/#findComment-534958 Share on other sites More sharing options...
JoeH Posted July 16, 2023 Share Posted July 16, 2023 I believe that line literally just pushes onto the fitting. If it's the same as the one in the picture you sent. You may be able to pull it off, cut a bit off, and put it back on if there's enough slack. Maybe wrong though. I'm used to these lines failing on the older endt676 motors. Maybe the e7 doesn't use leakoff lines from the injectors. Quote Link to comment https://www.bigmacktrucks.com/topic/73053-96-mr688-hard-start/#findComment-534959 Share on other sites More sharing options...
Joey Mack Posted July 16, 2023 Share Posted July 16, 2023 Yes the lines push on, He may have leaking o-rings within the banjo fitting.. If I understand the issue correctly.. Quote Link to comment https://www.bigmacktrucks.com/topic/73053-96-mr688-hard-start/#findComment-534960 Share on other sites More sharing options...
macattack Posted July 17, 2023 Author Share Posted July 17, 2023 Thanks guys. Ģonna check that out. Hopefully I can get to it. So there may be o ring or just copper washers. Thanks again. Really appreciate the help. Quote Link to comment https://www.bigmacktrucks.com/topic/73053-96-mr688-hard-start/#findComment-535054 Share on other sites More sharing options...
Joey Mack Posted July 17, 2023 Share Posted July 17, 2023 Copper washers... Sorry, forgot to say copper Quote Link to comment https://www.bigmacktrucks.com/topic/73053-96-mr688-hard-start/#findComment-535061 Share on other sites More sharing options...
macattack Posted July 19, 2023 Author Share Posted July 19, 2023 Thanks. Gonna check this out on the weekend. I will Let you guys know how it goes. Thanks again great site Quote Link to comment https://www.bigmacktrucks.com/topic/73053-96-mr688-hard-start/#findComment-535154 Share on other sites More sharing options...
macattack Posted July 19, 2023 Author Share Posted July 19, 2023 Would you happen to know what size the banjo fitting is and or size of the washers. Think I may try to pick up one fitting and washers before I tackle it. Thanks Quote Link to comment https://www.bigmacktrucks.com/topic/73053-96-mr688-hard-start/#findComment-535157 Share on other sites More sharing options...
Solution macattack Posted September 13, 2023 Author Solution Share Posted September 13, 2023 Thanks . Ended up cutting off the ends of the both hoses and reconnecting with new clamps. Also replaced the 2 copper washers. So far so good. Again thanks for all the help 1 Quote Link to comment https://www.bigmacktrucks.com/topic/73053-96-mr688-hard-start/#findComment-538778 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.