Vacuum Hoses 90 YJ 4.2L -
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post #1 of 2 Old 09-16-2001, 06:34 PM Thread Starter
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Vacuum Hoses 90 YJ 4.2L

90 YJ 4.2L stock. I am sure that I have a few Vacuum hoses out of place, and is effecting my performance and gas milg. The diagram under the hood is the same in the haynes book. Some of the items in the diagram are different than what I see on my engine. Where can I find a better or more specific diagrams?

90 YJ 4.2L
4" procomp lift
33x12.5 ProComp Mudders
Looks Great, Runs Horrible!
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post #2 of 2 Old 09-16-2001, 10:30 PM
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Location: Tri-Cities Washington
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I kinda have the same question but mine is for the 2.5. I think there are supposed to be two vacuum hoses hooked up to the stock air intake but there are no hoses that I can find to go there. I have searched the net and have had no luck. The haynes manual is totally useless!

1990 YJ | 4 Banger | SOA | 33 x 12.5 | K & N Air Filter Restrictor Removed |
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