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.
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Monday, December 19th, 2011 AT 8:34 PM

1 Reply

Tiny
HMAC300
  • EXPERT
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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