Board logo

zzr 1100 running problems
stephen.holdcroft - 24/4/15 at 02:59 PM

Hi, managed to get my car into my own garage after 4 years been stuck in my mums. It is a self build 7 type with a zzr1100 engine. Managed to get it started with carb cleaner and new fuel and lots of easystart. Now the bad bit, starts now with choke and full throttle and then runs ok on tickover. Rev it and it instantly dies, checked all plugs by taken them off one by one and it stalls, when each one has its lead pulled off, so spark must be good. Could it be blocked jets or a fuel supply issue. I have just changed the fuel pump to a zzr fuel pump as the one that was on seemed to overpower the float valves and fuel would come out of the clear air pipes on the carbs. Help

K13JOB - 24/4/15 at 03:20 PM

As you already suspect, it is s most likely fuel delivery (or lack of it) that causes engines to idle but die on load. As the car has been sitting for several years the jets are likely to be clogged up with fuel wax, or dirt.

Was the car running well before the lay up with the original fuel pump, also are you using a swirl pot to gravity feed the carbs as would have been on the bike?

stephen.holdcroft - 24/4/15 at 04:14 PM

Hi, No i have not got a swirl pot, does this have to be higher then the carbs, not much room in enginge bay. were can i get on if needed. It ran ok on other pump till lay up but now floods carbs.

K13JOB - 24/4/15 at 05:01 PM

quote:
Originally posted by stephen.holdcroft
Hi, No i have not got a swirl pot, does this have to be higher then the carbs, not much room in enginge bay. were can i get on if needed. It ran ok on other pump till lay up but now floods carbs.


Looks like you have answered your own question, if nothing else changed and timing etc. ok then the carbs are probably gummed up, float valve, jets etc.