I recently had what I thought was a primary TPS problem. My tick-over was low and it stalled every time it tried to idle. It also surged on a constant throttle when cruising.
My dealers fitted a new TPS and set up the voltage. They said they didn’t mess with the tune, they had been warned not to, but Richard at TTS said they could set up the TPS without screwing things up. After it was fitted the bike ran so badly that I assumed they had and told them to send it back to me.
I took it to a local tuner, who is unfamiliar with Tuneboy but has been tuning mainly race bikes for 20 years and he was willing to give it a go. He spent a day and a half trying to get the bike to talk to the lap top consistently, but had a lot of trouble downloading software and drivers from Tuneboy’s site. He made a great deal of progress but it was no where near right when he tried to download the latest version of Tuneboy it ceased working altogether, and yes, he had uninstalled the last version first. Thankfully he charged me two hours labour and put the rest down to experience!!
Les had kindly lent me his PC111 in case all else failed, thank God he did.
The bike was due back at the dealers to have clutch plates swapped so while it was there I got them to download the Triumph tune for CAT delete and ToRS so we knew what the base tune was and then took it back to the tuners for him to tweak it with PC111.
When he first tried it it was running on one! He took what plugs he could get at out from the back two and they were black as the hobs of well and wet. So cleaned them up (he didn’t have any in stock) and put them back before leaning the PC111 out. The previous tune must have been a bit rich! I wasn’t surprised at the Triumph tune making them wet, I was surprised at Richard’s tune making them black.
He got it running, it would tick over consistently and would give a smooth full throttle run. Now pay attention, coz this is where it gets interesting. At part throttle openings it was surging. Between 8% and 15% throttle openings it would consistently die and pick up, die and pick up.
Steve managed to capture this while it was happening, at about 10% throttle;
Given the delay in the A/F vs top graph it looks like it’s cutting fuel, but what struck me is the consistency of the shape of the A/F wave?????? WTF??
Not only that, but here is a full throttle run with A/F;
The massive tail off at the end isn’t the limiter. It’s too low for that. Steve tried to fatten up the A/F up there, but all that did was made it drop to 160 @ 5900rpm and then plateaux at that until the limiter.
For comparison here’s the last graph from Richard;
Any suggestions gratefully received. I’m supposed to be away the weekend after next and I need to get this sorted by then so any help is much appreciated.
My dealers fitted a new TPS and set up the voltage. They said they didn’t mess with the tune, they had been warned not to, but Richard at TTS said they could set up the TPS without screwing things up. After it was fitted the bike ran so badly that I assumed they had and told them to send it back to me.
I took it to a local tuner, who is unfamiliar with Tuneboy but has been tuning mainly race bikes for 20 years and he was willing to give it a go. He spent a day and a half trying to get the bike to talk to the lap top consistently, but had a lot of trouble downloading software and drivers from Tuneboy’s site. He made a great deal of progress but it was no where near right when he tried to download the latest version of Tuneboy it ceased working altogether, and yes, he had uninstalled the last version first. Thankfully he charged me two hours labour and put the rest down to experience!!
Les had kindly lent me his PC111 in case all else failed, thank God he did.
The bike was due back at the dealers to have clutch plates swapped so while it was there I got them to download the Triumph tune for CAT delete and ToRS so we knew what the base tune was and then took it back to the tuners for him to tweak it with PC111.
When he first tried it it was running on one! He took what plugs he could get at out from the back two and they were black as the hobs of well and wet. So cleaned them up (he didn’t have any in stock) and put them back before leaning the PC111 out. The previous tune must have been a bit rich! I wasn’t surprised at the Triumph tune making them wet, I was surprised at Richard’s tune making them black.
He got it running, it would tick over consistently and would give a smooth full throttle run. Now pay attention, coz this is where it gets interesting. At part throttle openings it was surging. Between 8% and 15% throttle openings it would consistently die and pick up, die and pick up.
Steve managed to capture this while it was happening, at about 10% throttle;
Given the delay in the A/F vs top graph it looks like it’s cutting fuel, but what struck me is the consistency of the shape of the A/F wave?????? WTF??
Not only that, but here is a full throttle run with A/F;
The massive tail off at the end isn’t the limiter. It’s too low for that. Steve tried to fatten up the A/F up there, but all that did was made it drop to 160 @ 5900rpm and then plateaux at that until the limiter.
For comparison here’s the last graph from Richard;
Any suggestions gratefully received. I’m supposed to be away the weekend after next and I need to get this sorted by then so any help is much appreciated.
