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Bad starting, rough idling

Tiny
LOUISSECLASSICS
  • MEMBER
  • 1969 PORSCHE 912
  • 50,000 MILES
Bad starting and rough idling.
backfires ad idle, carb and exhaust.
ad speed engine sounds OK!

engine for 15 years no running!
Adjusted valves, rebuild solex carbs, new cpl distributor electronic ignition,
new sparkplugs and wires.
Cleaning fluid trough carbs to clean engine.
Compression on 1 cil low (9)rest is 11.
Noisy left bank(knocking)ad idle(cold).

Could it be loose head?Or?
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Thursday, July 19th, 2012 AT 11:41 AM

2 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Do a leak down test, you may have a sticky valve.
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Thursday, July 19th, 2012 AT 12:43 PM
Tiny
LOUISSECLASSICS
  • MEMBER
  • 8 POSTS
Ok I will try that.
Still it is strange that 3e cil gives that knocking sound(cold more)
Let you know!
Thanks,
Jan.
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Thursday, July 19th, 2012 AT 1:00 PM

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