 D-Jet Problems, Stalls when hot, misses at med. rpms |
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| john_g |
 Mar 27 2015, 09:28 PM
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Member  Group: Members Posts: 110 Joined: 1-November 12 From: british columbia Member No.: 15,100 Region Association: Canada  |
I'm having problems that I'm pretty sure come from somewhere in the D-jet system. I have a '74 914, bored to 2056. Here are my symptoms:
It idles okay. It's a bit rough when cold, but it doesn't cut out on me and warms up to a steady idle quickly (1200 when cool, 800-900 when warm), but when it's been run for a longer time and is good and hot, the idle drops well below 800 and it stalls. It'll start back up right away but only if I treat it as if it's flooded - I have to put the accelerator to the floor as I restart it. Secondly, at mid rpm's, between 2200 and 2800, it hesitates, sputters, misses, and occasionally backfires - this happens whether it's cold or warm. What I've done or have had done: usual tuning routine replaced the CHT sensor replaced the MPS replaced the distributor cleaned the PVC valve checked for vacuum leaks checked the TPS, it seems good Two air-cooled mechanics with good reputations have worked on it and haven't been able to solve the problem fully. All the above helped a bit, but the situation is still there. There has to be some sensor that isn't reading the situation correctly. Any ideas, or ... has anyone had a similar problem? (IMG:style_emoticons/default/confused24.gif) |
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| warrenoliver |
Mar 28 2015, 10:33 AM
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Member Group: Members Posts: 363 Joined: 11-November 06 From: McFarland, Wisconsin Member No.: 7,199 Region Association: Upper MidWest |
John,
My 73, 2.0 used to do something like what you are describing. Along with a good tuneup, consider the relay board in the engine compartment. Mine had a loose connection that I could not see because it is covered with the backing material under the board. Mine would act up when it got warm and would cut out on me and at first would allow me to restart after cranking for a while. After a while, it got bad enough so I sometimes couldn't start it until it sat for a few hours and completely cooled the engine bay. The loose connection on mine was one of the fuse holders. I got a replacement one from a friend and it fixed it. Later, I scraped all of the backing material off the original board and found the loose post that was corroded. Good luck. |
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Posts in this topic
john_g D-Jet Problems Mar 27 2015, 09:28 PM
Old Yella Hi
I don't usually give advice but as I have h... Mar 27 2015, 11:03 PM
john_g
Hi
I don't usually give advice but as I have ... Mar 28 2015, 12:31 PM john_g
John,
My 73, 2.0 used to do something like what ... Mar 28 2015, 12:32 PM boxsterfan Everything you ever wanted to know about d-jet.
h... Mar 28 2015, 02:29 PM Java2570 I would absolutely make sure that your wiring harn... Mar 28 2015, 03:15 PM john_g
I would absolutely make sure that your wiring har... Mar 28 2015, 05:19 PM Millerwelds
[quote name='Java2570' post='2166659... Mar 28 2015, 06:03 PM The Cabinetmaker The plot thickens. Non stock cam changes everythin... Mar 28 2015, 06:43 PM john_g
The plot thickens. Non stock cam changes everythi... Mar 29 2015, 12:30 PM |
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