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Think I have it narrowed down to the check valve in the fuel pump with it dead cold its 20 deg out also I put a clamp on the return fuel line turned the key the pump primed gauge went up to 30psi and held there didnt leak below 30psi tapped the key it fired right up on the first crank gauge goes...

Yeah I came across the same info The alternator doesnt make sense because the jeep is charging and charging under load I dont really experience any miss firing at all When I did the engine swap I put a brand new distributor and of course new plugs and new wires and the dist came with new...

I have a ‘91 YJ with an auto trans Recently did an engine swap Jeep has 109k miles on it new engine came out of a good running 90k miles Jeep Engine came out of a ‘92 When driving it around town it runs fine I am noticing that when you give it more than half throttle its not that responsive...

‘91 is first year fuel injection HO motor im going to try and get a fuel pressue gauge on it this weekend and see what i get for a reading hoping its something simple

I have a ‘91 YJ that is a project im doing with my son had a blown engine in it according to the previous owner we sourced a new engine and swapped it and got it up and running it runs like a top no noise great oil pressure no overheating issues etc the only thing is that it starts up very...