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Old 07-07-2018, 12:28 AM
Thread Starter
Join Date: Jul 2018
Posts: 1
Exclamation YJ performance help!! Hard starting/no acceleration

I really need your guys help on this one. I have a 93 YJ 4.0 5 speed thats having major issues. Generally it takes about 5-7 seconds of cranking for it to start up. My other issue is that it looses ALL power and falls on its face when I step on it. To drive around town i have to SLOWLY SLOWLY step on the gas to get it up to speed. It has a brand new fuel pump, fuel filter, and TPS sensor. Any suggestions? Ive also reset the computer and did a DTC code test (no codes were shown).

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Old 07-07-2018, 09:18 AM   #2
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Join Date: Nov 2017
Location: El Paso TX
Posts: 378
I would look into your distributor. Any back firing with throttle application?

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Old 07-07-2018, 03:20 PM   #3
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Join Date: Apr 2018
Location: San Marcos, Texas
Posts: 284
I'll give you the same advice I was given when mine started getting harder to start. Clean the connections at the battery, clean where the - attaches to the block, clean where the + connects to the starter. I did those things and it helped a bit. What helped more was replacing the plugs, rotor, cap and wires.

Hope that helps.

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