1987 Jeep YJ not enough power

1987 JEEP WANGLER YJ
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JASONMC
  • MEMBER
  • 1 POST
Engine Performance problem
1987 Jeep YJ 6 cyl Four Wheel Drive Manual 135k miles

i have an 86 cj7 but i put an 87 yj motor in it.the problem is i dont have the power that i should,and if i just press the gas to to the floor it will just die .but if i tap the gas first it wont die ,but the jeep runs great other then that any suggestions thanks,jason o yea i have the 258 six in it thanks
Apr 6, 2009 at 1:25 AM
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JAMES W.
  • ✓Experienced Mechanic
  • 2,394 POSTS
I would start with a fuel pressure test. If pressure checks out good, run an ohmmeter test on the throttle position sensor to make sure it's smooth moving through it's range.
Apr 6, 2009 at 11:07 AM
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