 1.7L running rough in the mid RPMs, Potential Causes of rough running (MIDS) |
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| scwade |
 Oct 12 2003, 08:43 PM
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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 |
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Posts in this topic
scwade 1.7L running rough in the mid RPMs Oct 12 2003, 08:43 PM
garyh Distributor. Bad bearings (or weight springs) in i... Oct 13 2003, 10:22 AM Bleyseng Try a rebuilt unit from A1 Cardone to fix your ign... Oct 13 2003, 12:15 PM scwade Thanks - I'll try a new distributor and come b... Oct 19 2003, 12:49 PM Bleyseng Can't adjust the computer. You can adjust the ... Oct 19 2003, 01:00 PM scwade It runs fine all the way up to ~4000 rmp, then buc... Oct 21 2003, 10:49 PM garyh scwade Ok gents...The rebuilt Dizzy advice was great. Par... Oct 25 2003, 10:08 PM garyh Brad Roberts Pertronix. Ditch the points. You can buy them loca... Oct 26 2003, 11:26 AM scwade I know the points set the dwell (I must have messe... Oct 26 2003, 02:00 PM Brad Roberts I was suggesting an electronic points replacement ... Oct 27 2003, 12:19 AM scwade Ok - I now understand about the electronic points.... Nov 2 2003, 08:41 PM Brad Roberts You really need to adjust the valves. They have a ... Nov 2 2003, 10:26 PM scwade OK - I'm going for the valve adjustment next. ... Nov 6 2003, 11:58 PM Brad Roberts HPH stocks the kit. He is in Redwood city. Price i... Nov 7 2003, 12:22 AM 2teeners I found this pic, courtesy of Dave D. at the Pelic... Nov 7 2003, 08:28 AM scwade Thanks Brad and all. I think we've got it. I ... Nov 9 2003, 10:24 PM ChrisReale Stick with the W7CC Bosch Copper core's or the... Nov 9 2003, 10:47 PM garyh SirAndy 
Brad Roberts W7DC's Bosch plugs. Nothing else.
GaryH is co... Nov 10 2003, 04:50 AM  |
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