Will turn but not catch - JeepForum.com
 
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post #1 of 5 Old 08-19-2017, 05:25 PM Thread Starter
Startdmnyou
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Will turn but not catch

Hi I'm very new to Jeeps. I just brought a 1987 Jeep Comanche 4.0 5 speed rwd with 116xxx miles on it. When I looked at it before I brought it, it started up without much trouble. Fast forward a couple days. I went down with a trailer to get it and it won't start anymore. The guy said he hadn't touched it since I was down a few days ago. It had spark, it had air but it just doesn't seem to be getting fuel. It'll crank but won't catch. Fuel pump hums when it's turned to on and I've let it do that 6 or 7 times before cranking then it sounds like it's just about to start and then it dies. I've changed out the fuel pressure regulator and it doesn't seem to be getting any pressure in the lines. I've also reworked the grounds and cleaned the electrical area but I still have no luck with it starting. I have a fuel pump that I can put in but was wondering if maybe the hoses are bad or maybe the electrical system is bad. There's a new fuel filter on it too. Thanks for the help. Also does anyone know how to replace the floor pans? I have a replacement but no idea what I should do to put it in

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post #2 of 5 Old 08-22-2017, 06:53 AM
cruiser54
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Yikes!! Gotta love some people's wiring....

Just because you hear the pump it doesn't mean it is pumping. There is a rubber hose INSIDE the tank that swells, pops off, rots, splits etc.

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post #3 of 5 Old 08-23-2017, 11:40 AM Thread Starter
Startdmnyou
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Huh really? I think I'll take it apart and take a look then. I did finally get it to start and stay on for about 10 min. It sounded terrible though. Once I applied the gas it stalled. P.o said he was driving around fine except for the slave cylinder was leaking. He did say the p.o he bought it from had is sitting under a tree for 5 years so I'm sure it's gummed up or something
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post #4 of 5 Old 08-26-2017, 07:04 AM
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You could verify it with a fuel pressure gauge also.

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post #5 of 5 Old 08-27-2017, 08:53 AM Thread Starter
Startdmnyou
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Well you were right, took the fuel pump out and the hose from it was almost non-existent. Had a replacement fuel pump that I put it and now it starts right up and I finally drove it around for a little. Still lots of work though. Air doesn't blow, and it gets stuck in gear while running, I need to sand it down remove all the rust, Bondo and paint I'm thinking black. Also need to get a new bed for it, other one is rusted clear through, new floor pans, lift kit, bed line floor. Thanks for the help
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