Distributors and Trigger Points (New Dizzy Installed), Troubleshooting Parts - CHT appears bad |
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Distributors and Trigger Points (New Dizzy Installed), Troubleshooting Parts - CHT appears bad |
tvdinnerbythepool |
Sep 9 2021, 08:43 AM
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#1
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Member Group: Members Posts: 310 Joined: 24-July 18 From: Olympia, WA Member No.: 22,336 Region Association: Pacific Northwest |
Hey all,
I am still chasing down an intermittent RICH condition when the car is fully warmed up. 1.7L D-Jet After fully warmed up with a tuned and rebuilt MPS I can come to a stop light and idle steady at 850rpms, next stop light it's bogging down to almost 200-300 and barely running. Then next light it's idling normally again. Some days I have no issues with idle at all, others I do. I've gone through all the components and troubleshot my way through everything on the PBANDERS list of "my car is running rich". I am as confident as I can be through extensive troubleshooting and testing that my ECU, AAR, MPS, CSV, Vacuum Leaks, CHT, Injectors, Fuel Pressure etc are all good. All new wiring harnesses, plugs, plug wires, cap, rotor, coil, etc. The ONLY thing I haven't worked on is the distributor. I am reading up on the possibility of the Trigger Sensor Contacts being warn and bouncing possibly shooting off extra injection pulses...could this be the cause of the intermittent problem? It doesn't have points anymore, but a petronix I believe. What do you guys think? Is there an easy test for this or do I replace the trigger contacts or the whole dizzy? Cheers! (IMG:style_emoticons/default/beerchug.gif) |
emerygt350 |
Oct 1 2021, 07:44 AM
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#2
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Advanced Member Group: Members Posts: 2,096 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
The engine is designed with particular vacuum leaks expected, like the pcv.
Does your idle screw do anything at all? |
tvdinnerbythepool |
Oct 1 2021, 12:28 PM
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#3
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Member Group: Members Posts: 310 Joined: 24-July 18 From: Olympia, WA Member No.: 22,336 Region Association: Pacific Northwest |
@emerygt350 idle screw does work and is very effective in adjusting idle speed
@drphil914 I am running the analog 123 distributor for now. I will keep the OEM, source some trigger points etc but hope the 123 will be the way to go. Waiting on a new CHT from 914 and will also get a URO as a spare. Hope this thing is up and running soon. I will troubleshoot the CSV if I still have issues with the suggestion of it possibly leaking and also will suspect the ECU. People say they don't go bad but the one that came in this car was shot. Probably the $30 sensor though! Thanks for all the help guys. |
emerygt350 |
Oct 1 2021, 03:44 PM
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#4
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Advanced Member Group: Members Posts: 2,096 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
If the idle screw works can you bring the idle up with it or is it unstable (seems fine but when you drive it it drops low again)?
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tvdinnerbythepool |
Oct 1 2021, 09:00 PM
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#5
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Member Group: Members Posts: 310 Joined: 24-July 18 From: Olympia, WA Member No.: 22,336 Region Association: Pacific Northwest |
If the idle screw works can you bring the idle up with it or is it unstable (seems fine but when you drive it it drops low again)? Correct, I would adjust the idle screw out to raise the idle but didn't solve the inconsistency of sometimes having correct idle and a few minutes later too low idle. It never was "too high"... Parts are taking their time in the mail so hopefully Monday I can see where i'm at. |
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