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When the engine worms up no power firing out the exhaust

Tiny
DUTCHESS
  • MEMBER
  • 1973 CHEVROLET CORVETTE
  • 5.7L
  • V8
  • RWD
  • MANUAL
  • 1,500 MILES
Runs great cold when the engine worms up no power firing out the exhaust.
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Thursday, September 29th, 2016 AT 6:50 AM

3 Replies

Tiny
DOCHAGERTY
  • MECHANIC
  • 9,601 POSTS
You have described a possible intake manifold leak. Recheck timing and run a vacuum gauge to the manifold. (What cam is in there? Has cam timing been verified?) The reading should be steady at the risk of assuming a less than wild cam profile.
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Thursday, September 29th, 2016 AT 7:52 AM
Tiny
DUTCHESS
  • MEMBER
  • 2 POSTS
Yes a wild cam set up. I have put new distributor, new plugs, new wires, new cap, new coil, new fuel, pumps and nothing changes the problem.
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Thursday, September 29th, 2016 AT 8:58 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
If you say wild cam setup what is the idle at it may need to be in the 1500-1800 range and has a massive vacuum leak. Timing may need to be in 32-34 degree range at about 2000 rpm's. With no vacuum. Also what is firing order and has the cam changed the firing order.
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Friday, September 30th, 2016 AT 7:00 AM

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