Airflow sensor adjustment, L-jet troubleshooting |
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Airflow sensor adjustment, L-jet troubleshooting |
Anton |
Aug 4 2003, 04:22 PM
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#1
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Royal Orange Group: Members Posts: 161 Joined: 25-March 03 From: The Netherlands Member No.: 473 |
My 1.8 engine was running badly at idle and sounded harsh on acceleration. CO screw and dwell/ignition tune-up did not solve the problem. I thought it was time for another valve job until a 914 buddy of mine, Richard, adviced me to check on the airflow sensor. (IMG:style_emoticons/default/ohmy.gif)
After removing mucho messy glue on the cover (thanks, PO) and opening of the sensor, I found that the mixture was way too lean. There was a marking of the old position that was richer, but only after adjusting beyond this point, at a total of 8 (!) teeth on the wheel, idle became regular. What it did to acceleration and low rev. driving was even more remarkable... Is this what a 914 can do...? (IMG:style_emoticons/default/laugh.gif) It all became evident after a period of driving with backfire due to wrong dwell/timing. Some of you will now probably say "evidently". Also I have heard of this problem before, "just readjust a couple of teeth on the wheel", but a total of 8 teeth! (IMG:style_emoticons/default/blink.gif) Anybody care to comment on this? Is this usual for an L-jet? BTW, I have not yet checked the current CO reading. |
Anton |
Aug 6 2003, 05:49 PM
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#2
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Royal Orange Group: Members Posts: 161 Joined: 25-March 03 From: The Netherlands Member No.: 473 |
QUOTE(kellzey @ Aug 5 2003, 07:17 PM) There is an adjustment screw on top (accessible without opening the cover). It's in that deep little hole. I know; previously it was turned all the way in to enrich the mixture. Now the engine runs best with the screw 2/3 out. I do not posess a CO meter; will check on that later (or sooner when the smog test comes (IMG:style_emoticons/default/wink.gif) ). QUOTE(Marty Yeoman @ Aug 5 2003, 03:52 PM) You also have to adjust the small arm on the rotation plate to properly restore idle after spring softening (tooth repositioning). Arm for the fuel pump contact? Or the ridge in the right forward corner touching a small spring? The only other "arm" I see is sealed and adjustment would undo the previous actions. Please explain. |
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