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Boomingbeetle |
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#1
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Member ![]() ![]() Group: Members Posts: 118 Joined: 1-November 16 From: Orange County Member No.: 20,556 Region Association: Southern California ![]() |
I recently got back into the 914 world with the purchase of a nice '71 with sideshift trans and a 1.7L, now I need some help and suggestions.... SO I have officially become a registered user instead of just lurking and searching.
My motor runs for the most part, but it had a hell of a time starting up after a week, and it does spit and sputter a bit. After getting it to my workshop I adjusted the valves, I replaced the cap and rotor which were badly corroded. Plugs are in great shape, gaps are good, but when I went to set timing I noticed the distributor pinion was 180-deg off and the #1 plug wire was actually pointed toward the #1 cylinder. I moved the pinion to the correct "12-degrees" at TDC and corrently arranged the wires. I could not get it to fire up. I had to leave until this weekend but when I went back I checked a few more items. The distributor is a 009 with electronic ignition, not sure what brand. Coil shows 4-Ohms and I have good 12V to the coil. It started- but I had to baby it and hold the throttle until it was warmed up. Now I was finally able to check timing, but I cannot get it to rev to 3500 rpms. I can get to about 25-28 deg BTDC between 2500 and 3000, but it seems to fall flat and pop/sputter above 3000 and advancing the timing any further doesn't seem to make a difference. Weird because I was generally driving the car between 2500-4500 rpms before parking it to do this work. At first I thought there was a voltage drop at the ignition, now I'm beginning to think my carbs are not jetted correctly, but why could I drive it 70-80mph in midrange RPMs? Any ideas? I'll be heading back to the shop Friday to do some more troubleshooting but any feedback is appreciated. I can take pics if any further info is needed... Thanks! |
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mjrrti |
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#2
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High Desert Member ![]() Group: Members Posts: 49 Joined: 4-February 14 From: Apple Valley, Ca Member No.: 16,959 Region Association: Southern California ![]() |
I recently got back into the 914 world with the purchase of a nice '71 with sideshift trans and a 1.7L, now I need some help and suggestions.... SO I have officially become a registered user instead of just lurking and searching. My motor runs for the most part, but it had a hell of a time starting up after a week, and it does spit and sputter a bit. After getting it to my workshop I adjusted the valves, I replaced the cap and rotor which were badly corroded. Plugs are in great shape, gaps are good, but when I went to set timing I noticed the distributor pinion was 180-deg off and the #1 plug wire was actually pointed toward the #1 cylinder. I moved the pinion to the correct "12-degrees" at TDC and corrently arranged the wires. I could not get it to fire up. I had to leave until this weekend but when I went back I checked a few more items. The distributor is a 009 with electronic ignition, not sure what brand. Coil shows 4-Ohms and I have good 12V to the coil. It started- but I had to baby it and hold the throttle until it was warmed up. Now I was finally able to check timing, but I cannot get it to rev to 3500 rpms. I can get to about 25-28 deg BTDC between 2500 and 3000, but it seems to fall flat and pop/sputter above 3000 and advancing the timing any further doesn't seem to make a difference. Weird because I was generally driving the car between 2500-4500 rpms before parking it to do this work. At first I thought there was a voltage drop at the ignition, now I'm beginning to think my carbs are not jetted correctly, but why could I drive it 70-80mph in midrange RPMs? Any ideas? I'll be heading back to the shop Friday to do some more troubleshooting but any feedback is appreciated. I can take pics if any further info is needed... Thanks! I had a very similar issue when I put Empi copies of the Weber 34 on my car. It did turn out to be a jetting issue. I'm not sure why you could get it to run over 3500 RPM before the work though. Maybe if the timing was retarded a little more before the work was done it would allow it to run better at midrange??? If I remember correctly your main jets take over from the idle circut around 3000 RPM. It has been quite a while since I had this issue but I am pretty sure that bigger mains cured my problem. You do have the carbs synchronized right? Maybe someone with more recent or better knowledge will chime in. Good luck (IMG:style_emoticons/default/welcome.png) |
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