Ajblomq Posted March 22, 2023 Share Posted March 22, 2023 Picked up a 1991 4x4 4.0 long bed a few months ago. Needed a new battery and would crank but wouldn’t start. Changed distributor, ignition coil, wires, plugs, and CPS. Now it has a hard start and a little rough idle. I’ve done the fuel filter too. There’s a weird DIY vacuum setup so idk if that’s affecting it. It starts everytime but I’m afraid I’ll wear out the starter. If I start it and then turn it off and turn it back on it starts up right away. Maybe fuel pressure or weak spark? Link to comment Share on other sites More sharing options...
Pete M Posted April 3, 2023 Share Posted April 3, 2023 a vacuum leak can definitely affect things. can you share pictures? Link to comment Share on other sites More sharing options...
gogmorgo Posted April 3, 2023 Share Posted April 3, 2023 If you can drive it for a bit, or even just sit idling, you might be able to get some codes off of it. The CEL will only be on during an active fault, but codes will be retained for 50 key cycles. I wouldn’t be concerned about burning out a starter. They’re usually good for a few thousand starts. What really kills them is low voltage during cranking due to a weak battery or poor connections. Link to comment Share on other sites More sharing options...
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