1.7L running rough in the mid RPMs, Potential Causes of rough running (MIDS) |
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1.7L running rough in the mid RPMs, Potential Causes of rough running (MIDS) |
scwade |
Oct 12 2003, 08:43 PM
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#1
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Newbie Group: Members Posts: 10 Joined: 31-August 03 From: santa clara, ca Member No.: 1,091 |
I have a 1971 1.7L (with big bore kit) running FI. I'm having some odd behavior between 4,000-4,300 RPM. It runs rough at that RPM regardless of gears/speed.
I've checked timing at 3,500 (fine). I've swapped spark plugs (bosh) // got rid of some pre-detination ping, but still have the roughness (cutting out) I've put in 91 octane (best I can get here in CA) Still happens. PS - it idles rough as well. When I remove the "retardation" line it idles fine. I've not tried to run it full boar with no retardation though. Any ideas? Scott |
Brad Roberts |
Oct 27 2003, 12:19 AM
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#2
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
I was suggesting an electronic points replacement setup. You dont have to set the dwell with the electronic ignition.
I really wished I had read this thread BEFORE these guy's told you to buy a rebuilt dizzy. I would have led you down another path towards diagnosing the problem. Points can be finicky in our area during the winter (moisture)... so most of us in NorCal run a replacement setup. B |
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