 2500 RPM stumble partial throttle 2.0 -4 |
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| SVG223 |
 Mar 13 2025, 08:35 PM
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#1
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Member  Group: Members Posts: 113 Joined: 6-February 22 From: Benton Arkansas Member No.: 26,317 Region Association: None  |
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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Replies
| emerygt350 |
Mar 14 2025, 03:26 PM
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#2
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Advanced Member Group: Members Posts: 2,887 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
To me that is a clean plug with your 'powder' on the ground. I had another post with plugs that looked just like the OPs. It's the powder coating that I am interested in. If it is the cycling miss that causes that I am happy to find out that is cause. That was, I believe, before I figured out it was the TPS causing the miss. This year (once the alt. Is replaced) I plan and leaning the mixture on the mps. It will be interesting to see how the plugs respond.
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Posts in this topic
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 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 SVG223 I cleaned the distributor; the mechanical advance ... Mar 19 2025, 02:53 PM emerygt350 I would check your plugs and watch your head tempe... Mar 19 2025, 04:45 PM emerygt350 Oh, and did you get a dwell meter? Incorrect dwel... Mar 19 2025, 04:58 PM SVG223 duplicate Mar 19 2025, 06:15 PM SVG223 No dwell meter. I don't think this worn distri... Mar 19 2025, 06:15 PM ctc911ctc
No dwell meter. I don't think this worn distr... Mar 20 2025, 03:21 PM emerygt350 A poor spark can result in a miss. And don't ... Mar 20 2025, 05:30 AM emerygt350
I wouldn't ignore the dwell. Could be a re... Mar 20 2025, 06:37 AM ctc911ctc My 914 mentor, Richard Towle would say that for th... Mar 20 2025, 03:13 PM emerygt350 duplicate post Mar 20 2025, 06:37 AM SVG223
duplicate post
I ordered a Hot-Spark electronic ... Mar 20 2025, 02:39 PM brant a worn out distributor shaft will make a newer poi... Mar 20 2025, 03:26 PM brant I have a half dozen DJet distributors from differe... Mar 20 2025, 03:28 PM SVG223 It looks like I have about .005" of lateral p... Mar 20 2025, 04:42 PM |
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