1986 Chevrolet Monte Carlo Bought Car Recently Car Power Crawls 25 Runs

1986 CHEVROLET MONTE CARLO
150,000 MILES
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ETVALENTIN3
  • MEMBER
  • 2 POSTS
i bought the car recently...car has no power, crawls up to 25 then runs ok...not fast at all, but will cruise...if you floor it, it pops under hood and stalls...have code 21 for TPS...i've changed MAP, TPS and fuel filter...still has same problem...i was thinking clogged cat, but i tap it with a hammer and don't hear rattling...any ideas?....
Oct 17, 2012 at 11:20 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
check vacuum at idle if 15" or below suspect clogged converter. if it pops then it can be ignition or cam/liter problem. check fuel pressure what engine is in this?
Oct 17, 2012 at 12:11 PM
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ETVALENTIN3
  • MEMBER
  • 2 POSTS
it's the 4.3 6cyl engine...i cut the cat last night but still have the same problem...
Oct 18, 2012 at 8:11 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
check fuel pressure and scan for codes
Oct 19, 2012 at 7:04 AM
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