- Sat Jun 11, 2022 12:31 pm
#101351
I'm hoping someone here can help me with a problem with my 2016 C5?
The bike (6000 miles) has a new battery, K&N and free flow exhaust . It has always run well apart from regular fouling of the spark plugs. I tried hotter plugs ( NGK 8,7,6,5, and Iridium ) which just extended the time before the plug fouled. Then I went to NGK 4 and that problem disappeared. Till the mechanic took one look at the 4 and said "oi ... you'll burn a hole in your piston !" So on his recommendation, I bought a matching Power Commander from Hitchcocks.
First up he found a bent pin on the Throttle Body which he reckoned was the root of my plug fouling problem. One new Throttle Body ( because that's the only way to get a new pin) and then on to the dyno tune to fit the Power Commander.
A £1000, 20 hours and two months later, the bike is just awful. He says has done all he can to map the Power Commander to the ECU but can not correct a section of performance at the low end of the throttle. The bike blips and bucks when held at constant low revs . He says it's a problem with the quality of the original ECU and no amount of work on the Power Commander and the dyno has fixed the problem. He also says he has come across poor connections on the electrics, including disconnecting the side stand cut-out while trying to get the Power Commander "tuned.
Today's test run was diabolical. The bike was warm and idling nicely when I collected it. He said apart from the low throttle problem he couldn't tune out, it had been running well.
When I accelerated away the engine immediately started cutting in and out on the run up the road and I almost lost control while turning. He now says there must be electrical problem (none of which were there before fitting the Power Commander.) and suggested he start by investigating the "ignition pick up" ...
The garage is the city's oldest. 50 years in business, experienced with British bikes, Dyno tunning and Power Commanders.
Has anyone seen or heard of these problems or have any suggestions?
-a section of the throttle (low end) that the Power Commander can not "tune"?
- electrical faults after fitting the Power Commander?
- electrical faults that match some of what I have described (sadly that's a pretty large category)
I've seen some very knowledgeable and helpful people here on the Forum and I'm hoping you can help.
Kind regards
The bike (6000 miles) has a new battery, K&N and free flow exhaust . It has always run well apart from regular fouling of the spark plugs. I tried hotter plugs ( NGK 8,7,6,5, and Iridium ) which just extended the time before the plug fouled. Then I went to NGK 4 and that problem disappeared. Till the mechanic took one look at the 4 and said "oi ... you'll burn a hole in your piston !" So on his recommendation, I bought a matching Power Commander from Hitchcocks.
First up he found a bent pin on the Throttle Body which he reckoned was the root of my plug fouling problem. One new Throttle Body ( because that's the only way to get a new pin) and then on to the dyno tune to fit the Power Commander.
A £1000, 20 hours and two months later, the bike is just awful. He says has done all he can to map the Power Commander to the ECU but can not correct a section of performance at the low end of the throttle. The bike blips and bucks when held at constant low revs . He says it's a problem with the quality of the original ECU and no amount of work on the Power Commander and the dyno has fixed the problem. He also says he has come across poor connections on the electrics, including disconnecting the side stand cut-out while trying to get the Power Commander "tuned.
Today's test run was diabolical. The bike was warm and idling nicely when I collected it. He said apart from the low throttle problem he couldn't tune out, it had been running well.
When I accelerated away the engine immediately started cutting in and out on the run up the road and I almost lost control while turning. He now says there must be electrical problem (none of which were there before fitting the Power Commander.) and suggested he start by investigating the "ignition pick up" ...
The garage is the city's oldest. 50 years in business, experienced with British bikes, Dyno tunning and Power Commanders.
Has anyone seen or heard of these problems or have any suggestions?
-a section of the throttle (low end) that the Power Commander can not "tune"?
- electrical faults after fitting the Power Commander?
- electrical faults that match some of what I have described (sadly that's a pretty large category)
I've seen some very knowledgeable and helpful people here on the Forum and I'm hoping you can help.
Kind regards
