Optimizing D-Jetronic, Brainstorming.... |
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Optimizing D-Jetronic, Brainstorming.... |
pbanders |
Apr 18 2007, 04:28 PM
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#1
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Senior Member Group: Members Posts: 939 Joined: 11-June 03 From: Phoenix, AZ Member No.: 805 |
Here are my thoughts on a systematic approach to optimizing D-Jetronic for a specific stock or near-stock engine - just putting this down and looking for comments:
Comments? If the intake system has been significantly modified (e.g. different cam, big valves, etc.), then to do the dyno procedure correctly, an assessment of the VE changes would need to be made, and the ECU daughter-card SC circuit would need mods - but this is beyond a reasonable approach for most people. |
jasons |
Apr 18 2007, 05:25 PM
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#2
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Jackstand Extraordinaire Group: Members Posts: 2,002 Joined: 19-August 04 From: Scottsdale, AZ Member No.: 2,573 Region Association: None |
Thats basically what I did when I had my idle hunt problem. I never touched my MPS, but I basically refurbed the rest of the system. The only parts I didn't touch were the MPS and the ECU. Otherwise, everything else was new or refurbed.
I had the idle hunt, so I put in a variable resistor and dialed it up to about 380 ohms (where the idle stabilized). Now it runs great, idles stable when hot, and passed AZ Emissions no problem. (other than the monkey that worked there couldn't shift my car!) My FI is 73 and obviously requires at least the factory spec'd 280 ohm resistor. Oh and my car has MSD, Pertronix, and Euro-race header. |
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