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I thought some of you would like to hear what Jak did for my car in detail. (As best as I remember)
In 7 hours over 2 days Jak was able to do the following:
Data log 3 runs and show that my car seemed to be running rich but it had a slight misfire. So after a thorough check of the ignition system the miss was gone. And I had a new rotor cap and cooler spark plugs. So we did 3 more runs to establish a base line without misfire. This would show that the car was running very lean and the unburnt fuel from the misfire had been masking this condition. My car was to lean to drive hard safely! Then Jak found 2 vacuum lines on the HVAC that I had crossed. Now the controls work much better. He also found various other switches and plugs that were not putting out clean signals. After looking over the baseline runs on the computer, we set the timing and did like 20 more 3rd gear pulls, changing one or two thing at a time. After every 3 runs we would stop and look over the data. Then Jak would play with the timing, change computers or switch chips trying to improve on the previous runs. One of the cooler things he did was pull into a gas station and make a richer fuel map on the laptop. On the next run the wide band showed richer readings. (I will be selling my rising rate regulator if anyone wants one!) We were still having other problems so we did not keep that map. But how cool. I do not have $1500 stand alone management, it’s just junkyard parts! Jak changed like 10 more things and put the stock Volvo computer back in. The Volvo computer is working well for me so I did not have to buy a custom chip yet :-). He also adjusted my exhaust and put on a new inner driver boot as my exhaust was to close to it. I like to think I know a lot about my car as no one else has ever worked on it, but I did not have the skills or tools to do this work my self. I always thought about having my car professionally tuned on a dyno but knew I could not afford to have it done. All I need the dyno for now is to confirm the results.
posted by 68.115.20...
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