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89Wrangler YJ7 05-09-2013 06:32 PM

Gremlins 89 YJ7
Bought jeep last night, noticed vibration after 40 continues through the speed intensifies a little its not constant the vibration does up down up down picture an oblong oval custom drive shaft in back, notice fluid doming out of front of ford 8 inch where DS goes in, bad bearing,seal? Or is the axle bent its a 28 spline, it had a 304 in before i bought it and he said he was breaking drive sahfts all the time,ujoints more likely, also 3 fuel pumps have gone out on it, last one was an in tank unit with regulator then filter mechanic said it was fried only two tanks of fuel went through it in 1 year so sediment? wiring? everything was replaced for fuel delivery says prev owner lines everything, so thats what i got going on any help would be great, motor is a high output 96 I6 out of cherokee

0III0forlife 05-09-2013 08:01 PM

Is it a Tom Woods or some other proffesional driveshaft? Or is it just a home built shaft? It might need balanced if it is. Probably what destroyed the front input shaft seal in the Ford 8.8

The size of the motor shouldnt matter for the fuel pump. If it previously had a 304 V8 in it, that wasnt stock, and it had a fuel pump on the motor not in the tank. Or atleast thats the way any 304 I have ever had was. Could be the strainer sock on the bottom of the pump in the tank is clogged with sediment. Might be time to drop the tank for inspection.

89Wrangler YJ7 05-12-2013 02:56 PM

sediment in tank big time flushed it now two days later it bogs down when get on gas idles just fine i go for a drive it bogs and back fires set psi at rail to 42 per haynes manual no change, pump is hard wired to ignition turn key pump is on its a 100 psi unit followed by an edelbrock efi regulator model 1729 could it be the computer not knowing whats going on? so the ignition is malfunctioning? help!!! i wanna get out and ride!

89Wrangler YJ7 05-12-2013 03:32 PM

Would the nutter bypass work on my 96 I6?

Ghost_rader 05-13-2013 07:38 PM


Originally Posted by 89Wrangler YJ7 (Post 3747758)
Would the nutter bypass work on my 96 I6?

No it only works on carbed engines. Your 4.0 is fuel injected

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