After tune up engine running terrible

Tiny
SHEILA JACKSON
  • MEMBER
  • 1999 CHEVROLET TAHOE
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.
Monday, December 19th, 2011 AT 8:34 PM

1 Reply

Tiny
HMAC300
  • 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.
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Monday, December 19th, 2011 AT 11:21 PM

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