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The usual symptoms: In first and second partial throttle/decel it has a surge and backfire. Once you roll on there is not a problem especially once you get above 4,000 in 3rd and 4th. I have adjusted the trim screw in the aft position on the P8 computer and I increased the fuel flow and it helped to a certain extent but I would like to get it right. Maybe that is not possible, I may just have to live with it; as it will get me from point A to B in a very reliable fashion. But since I have the interface cable, I wanted to know what I could do...It would be especially advantageous regarding the TPS measurement to measure it from the computer than unplugging the connector and putting the multimeter probes in as this just measures voltage and not position of the sensor. Correct me if I am wrong.
Yes Wayne, but what is the download? The specific download for that computer?
Is the Will Creedon chip still available for these models? I never tried one, but some sang its praises.Then there was also one available from Australia, but I can't remember his name. Somebody Jefferies, perhaps?
I'm pretty sure Will never did a chip for the P8. He did most of his work on the 15M.There was a P8 chip, but I don't recall the name of it. Since the P8 and California 1100i ran so well, likely a touch too rich, few people bothered worrying about it.I have a copy of the data for those chips somewhere in my files. Geez, over 20 years old now. I don't know if my prom burner still works though.
The 15M can be written to by the Guzzi diag writer program. I think you mean the 16M for the ones Will worked with.
Oops. Yes, brain fart. 16MAlso, not sure why the 16M came before the 15M.
For me, after a couple longish trips went back to stock and haven't looked back.Got so far into it I forgot how comfortable a well tuned stocker ran.
Other then the temp sensor in the left valve cover, the P8 works pretty well in stock form.
I did put a K&N in and a set of slash cut Macs on also, but it still has that unnerving hesitation/bog/fueling problem at 3500-4000rpm. I also got an Eprom from Germany but it was so old that the prongs disintegrated when installing. However, I did get the number off of that unit and ordered 20 more from China but they were all a different number even though the picture (EBay) was the correct one. I installed it and the fuel pump would cycle on/off and the rev counter would blip. So, I went back to to the old 441.