after tune up engine running terrible

1999 CHEVROLET TAHOE
Avatar
SHEILA JACKSON
  • MEMBER
  • 7 POSTS
I have 99 Tahoe just had it tune up now it will only do about 20 mph they seam to think it has jump time can you help me with this.
Dec 19, 2011 at 12:34 PM
Avatar
HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
if it's a 350 then bring engine up to #1 with harmonic balancer showing around "O". take dist capoff and it should be between 11&12 O clock. that is where it should be. it also may be the dist gear is worn on the shaft.
Dec 19, 2011 at 3:21 PM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
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 new question

Frequently Asked Problems for This Vehicle