2000 Honda Accord
~119k miles
I completed a timing belt replacement job (all three belts & both pulleys, TB auto-tensioner, water pump & front eng. mount--all OEM Honda parts). I quadruple-checked timing marks before and after TB removal and replacement, and I manually turned over the engine a dozen times to seat the belt, check for interference, and TDC at all pulleys--absolutely no problems there. Once finished, I topped off the coolant. Then I started the engine...
- Cold engine turns over fine, but idles high at ~1700 (per scanner; engine temp is 61°). After ~5 secs the engine surges cyclically between ~1600 to ~1700;
- I can hold idle steady with the throttle or by shifting into gear, although load idle remains high;
- I held idle at ~2500 for ~5 min, then drove it around my neighborhood for ~2 miles (~10 mins at <30mph);
- I drove it through each gear: idle is steady (though high) thru 2,3,4, but engine surges in first gear;
- Surging resumes after I shift to park (or neutral); engine temp levels at 174°;
- There is no check engine light, and no codes on the scanner;
- I found no obvious vacuum leaks or loose electrical connections.
I have not purged the coolant system of air per procedure because I simply cannot locate the bleeder valve on this engine, even with shop manual and flashlight in hand!
I followed the procedure in the shop manual, and noted my progress on paper as I worked. I found no loose vacuum lines in the vicinity, nor any loose electrical connectors. Could I have possibly missed something, or pulled something loose? Could replacing a TB induce high idle/engine surge, yet with no codes? ...or is this merely coincidental, unrelated problem.
~119k miles
I completed a timing belt replacement job (all three belts & both pulleys, TB auto-tensioner, water pump & front eng. mount--all OEM Honda parts). I quadruple-checked timing marks before and after TB removal and replacement, and I manually turned over the engine a dozen times to seat the belt, check for interference, and TDC at all pulleys--absolutely no problems there. Once finished, I topped off the coolant. Then I started the engine...
- Cold engine turns over fine, but idles high at ~1700 (per scanner; engine temp is 61°). After ~5 secs the engine surges cyclically between ~1600 to ~1700;
- I can hold idle steady with the throttle or by shifting into gear, although load idle remains high;
- I held idle at ~2500 for ~5 min, then drove it around my neighborhood for ~2 miles (~10 mins at <30mph);
- I drove it through each gear: idle is steady (though high) thru 2,3,4, but engine surges in first gear;
- Surging resumes after I shift to park (or neutral); engine temp levels at 174°;
- There is no check engine light, and no codes on the scanner;
- I found no obvious vacuum leaks or loose electrical connections.
I have not purged the coolant system of air per procedure because I simply cannot locate the bleeder valve on this engine, even with shop manual and flashlight in hand!
I followed the procedure in the shop manual, and noted my progress on paper as I worked. I found no loose vacuum lines in the vicinity, nor any loose electrical connectors. Could I have possibly missed something, or pulled something loose? Could replacing a TB induce high idle/engine surge, yet with no codes? ...or is this merely coincidental, unrelated problem.
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