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) |
914_teener |
Sep 14 2021, 04:13 PM
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#2
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914 Guru Group: Members Posts: 5,198 Joined: 31-August 08 From: So. Cal Member No.: 9,489 Region Association: Southern California |
What do you think? That's normal?
So you think you want to spend near $100 for a set of trigger points and what is the expectation? Since you have the dizzy out and you see there is a problem, take care of it. I have but only one conclusion from looking at your pictures....the shaft is worn and putting a new set of trigger points will accomplish....not a whole lot... since you asked. I could be wrong but that what it appears to be. What about the advance plate that Rich posted about....has that been cleaned up? BTW...have you tested the vaccum advance pots on it? Because if you haven't, there could be a vaccum leak there causing your mixture to run rich and advance curve to be retarded. So if you haven't tested the dizzy....you haven't tested all of the FI components. When I restored my car I took ALL the FI components off it and redid or cleaned everything and tested everything....except checking the dizzy. I cleaned it but it would not idle steadily. Once I replaced it with an electronic unit....it ran like a raped ape and I didn't touch it for years with expection of cleaning the engine bay every so often. With D-jet you need to check else everything first before you start messing around with the mixture on the MPS if it teste good. Replace....or rebush and rehab the dizzy. That'd be what I think. Anything is salvagable just depends how much time and money you want to spend on it. I don't mean to dampen your enthusiasim, good for you for tinkering, but seems like you are spinning your wheels and throwing parts at a problem. Post a pic of your wiring harness. What is the condition of that component? I chased a cracked wire for a month and then just said screw it...took everything apart and got a new one from Jeff Bowlsby. That dizzy is probably 50 plus years spinning at high RPM'in heat, moisture ect. Good luck. |
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