2000 Jeep Wrangler I'm stumped

2000 JEEP WRANGLER
185,000 MILES • 4 CYL • 4WD • MANUAL
Avatar
BCALD44
  • MEMBER
  • 11 POSTS
I just rebuilt the engine for my Wrangler. All pistons, rings, lifters, push rods, rockers are new. I didn;t see any problems with the valve train so it was left alone. New gaskets were installed throughout. The problem is its hard to start and when it does start it idles rough, and there is a significant loss of power. Cylinder compression was checked and the number 4 cylinder shows a loss of about 8-10 PSI from the other cylinders (all of which are almost perfect). What could be the problem? Could that minimal compression loss be the culprit?
Aug 5, 2009 at 11:34 AM
Advertisement
Avatar
MHPAUTOS
  • ✓ASE Certified Mechanic
  • 31,937 POSTS
  • ASE Certified Mechanic
Hi there,

thank you for the donation,

That compression variance is well with in the acceptable tolerance, this will not be the problem, check for any vacuum leaks, re check all sensors are connected, run a scan to see if a fault code has been set, check all tune items, look at the basics first before digging deeper, re post after you have looked at these items if you need more assistance.

mark (mhpautos)
Aug 5, 2009 at 6:22 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.