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> 2500 RPM stumble partial throttle 2.0 -4
SVG223
post Mar 13 2025, 08:35 PM
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2400-2600 rpm stumble with partial throttle, stumble goes away under full throttle. Runs smooth at all other RPMs. Pulled the plugs, a little lean maybe?



Edit 3-17-25 I found a possible cause; worn distributor bushings causing a variation in the points gap.
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SVG223   2500 RPM stumble partial throttle 2.0 -4   Mar 13 2025, 08:35 PM
jim_hoyland   TPS ? Common issue….   Mar 13 2025, 08:40 PM
dr914@autoatlanta.com   as a stab in the dark, I agree, and check the grou...   Mar 15 2025, 11:02 AM
gonzo54   2.0 DJET? I would suspect TPS board - there are ma...   Mar 13 2025, 08:49 PM
SVG223   That sounds reasonable. I replaced the TPS board 3...   Mar 13 2025, 09:03 PM
emerygt350   That is looking very lean as well. Is this stock?...   Mar 14 2025, 06:40 AM
SVG223   That is looking very lean as well. Is this stock...   Mar 14 2025, 05:23 PM
Superhawk996   I had these plugs under a strong LED shop light ...   Mar 15 2025, 07:07 AM
SVG223   I had these plugs under a strong LED shop light...   Mar 15 2025, 01:26 PM
Superhawk996   None at of those plugs are lean   Mar 14 2025, 08:05 AM
emerygt350   None at of those plugs are lean Maybe I don...   Mar 14 2025, 10:00 AM
Superhawk996   None at of those plugs are lean Maybe I don...   Mar 14 2025, 11:46 AM
emerygt350   [quote name='emerygt350' post='3196271' date='Mar...   Mar 14 2025, 12:02 PM
windforfun   Try some electronic contact cleaner on the TPS. T...   Mar 14 2025, 11:44 AM
SVG223   Try some electronic contact cleaner on the TPS. ...   Mar 14 2025, 07:44 PM
Superhawk996   Here’s your post ? http://www.914world.com/bbs2/...   Mar 14 2025, 12:31 PM
emerygt350   To me that is a clean plug with your 'powder...   Mar 14 2025, 03:26 PM
emerygt350   I chased what I thought was a lean miss for months...   Mar 15 2025, 06:04 AM
SVG223   I chased what I thought was a lean miss for month...   Mar 15 2025, 02:53 PM
brant   Agree with Superhawk. All of the basics first T...   Mar 15 2025, 10:06 AM
SVG223   Agree with Superhawk. All of the basics first ...   Mar 15 2025, 01:35 PM
ctc911ctc   Strongly suggest that you buy this book, has saved...   Mar 15 2025, 11:54 AM
SVG223   Well, I tried the suggestion from @emerygt350 ab...   Mar 15 2025, 03:35 PM
emerygt350   Interesting. I would also check the coil too. Al...   Mar 15 2025, 04:04 PM
brant   Doubt it is the distributor points for fuel inject...   Mar 15 2025, 05:06 PM
emerygt350   I had another thought as well... Does your car hav...   Mar 16 2025, 05:32 AM
SVG223   I had another thought as well... Does your car ha...   Mar 16 2025, 02:03 PM
JeffBowlsby   A better price on the Tech Tips book - Direct from...   Mar 16 2025, 08:13 AM
SVG223   A better price on the Tech Tips book - Direct fro...   Mar 16 2025, 02:05 PM
emerygt350   The car will run fine without the TPS. It's o...   Mar 16 2025, 03:55 PM
SVG223   The car will run fine without the TPS. It's ...   Mar 16 2025, 04:23 PM
emerygt350   Excellent. Often that gets put on something... W...   Mar 16 2025, 06:23 PM
SVG223   I found some play in the distributor shaft. I thou...   Mar 16 2025, 09:40 PM
emerygt350   Don't forget your dwell. That can make a big ...   Mar 17 2025, 05:27 AM
SVG223   Don't forget your dwell. That can make a big...   Mar 17 2025, 02:04 PM
SVG223   Now I'm thinking about buying a dwell meter an...   Mar 17 2025, 01:51 PM
emerygt350   Bad bearings can do that. If I were you I would j...   Mar 17 2025, 02:56 PM
FlacaProductions   The petronix issue with leaving your ignition on w...   Mar 17 2025, 07:25 PM
SVG223   The petronix issue with leaving your ignition on ...   Mar 17 2025, 07:28 PM
SVG223   The vacuum retard diaphragm has a hole in it. That...   Mar 17 2025, 07:27 PM
emerygt350   Yeah, a hole there will just be a vacuum leak at i...   Mar 18 2025, 05:24 AM
SVG223   Yeah, a hole there will just be a vacuum leak at ...   Mar 18 2025, 02:47 PM
emerygt350   No, I have the non Bluetooth version and it has be...   Mar 19 2025, 08:26 AM


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