Subject: Engine Miss on the RH cylinder. Sun Nov 18, 2018 6:24 pm
After rollerising I did some service work on the GRiSO. Valve clearances adjusted. New plugs and boots. Throttle bodies balanced. Installed a Beetle map.
Bike runs great. Huge improvement with the map.
The only issue I have is that the bike has a miss on the RH cylinder when the engine gets hot, waiting at a set of lights.
On start up the idle is fine and while moving I cannot notice the miss.
Hooked up Guzidiag and gauges and had another look this morning.
Idle is good until temp gets to 85-90, then the RH cylinder starts missing. A couple of readings I noticed while this was happening. Temp 88 Idle stepper controller 24 (was 40 while temp was lower and idle good) Idle stepper base 70
Anything else I should be looking at?
On Marks suggestion I increased the CO to +2. This didn't make any difference other than a bit of popping when backing off the throttle.
Any suggestions on what I could do here before I have to look for someone to start diagnosing this?
Pete Roper GRiSO Capo
Posts : 10724 Join date : 2013-05-29 Age : 67
Subject: Re: Engine Miss on the RH cylinder. Sun Nov 18, 2018 6:43 pm
Check both ends of the HT lead. What caps are you using?
Pete
GRD Tanabuso
Posts : 61 Join date : 2017-05-16
Subject: Problem solved Sun Nov 18, 2018 8:51 pm
Pete Roper wrote:
Check both ends of the HT lead. What caps are you using?
Pete
Yeah I did that and swapped coil around, NGK caps.
Just after I posted, a couple of 6 mm brake bleeders arrived in the post, so I thought I'd check the last thing I did on the bike, the low RPM throttle body sinc.
I hadn't opened up the low RPM adjuster on the right hand side enough. Opened up a bit more and no more miss, steady as, right up to 100 degrees.