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Starts but will not rev above 3000 RPM's

Tiny
TED MORHOUS
  • MEMBER
  • 1987 MAZDA RX7
  • 1.8L
  • 2WD
  • MANUAL
  • 66,000 MILES
It ran okay, but over the winter mice got at it. It would start great, but when it reached 2000 rpm's it would quit running. Dealer found broken wires etc and fix that part. Now they cannot get it to run over 3000 rpm's. Any suggestions?
Saturday, July 16th, 2016 AT 7:35 AM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check intake manifold vacuum at idle if 15" or below check for a blocked exhaust. If fuel injected check fuel pressure with a gauge.
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Saturday, July 16th, 2016 AT 11:50 AM
Tiny
TED MORHOUS
  • MEMBER
  • 2 POSTS
Checked with dealer mechanic and both those items checked out fine. Tks for your help.
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Wednesday, July 20th, 2016 AT 7:44 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,690 POSTS
Yes those engine have an actuator that opens additional ports for the intake, please check the vacuum lines leading to these actuators and get back to me, also check the linkage.

Best, Ken
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Thursday, July 21st, 2016 AT 11:15 AM

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