iwanemail1@gmail.com
New Member
Our starboard engine dies at any RPM and does so very often (10-60 seconds apart if at 3kRPM or less, last week it would do it at 6k rpm too)
Background: Seems it did not like sitting in the garage for the winter (mild az winter - only did the seasonal oil+filter change and coolant change) - Am suspecting fuel issue - Engines are 2007 normally aspirated and only have 72hrs total. Last year I had the same issue on first day of the season, it was with both and after running them for about 30 minutes all was well for the rest of the season. BUT this year its been a few hours with only one doing much better (port side) and the starboard is still dying very easily when I reduce the RPMs to 3k or less (at random.) It also has the RPMs lower than the port engine with short exceptions where it suddenly has the same RPMs, then drops back to 500-2k rams less (more dealt at higher RPMs.)
Note: I did use a can of seafoam on a half tank of gas (2ish gallons) at the start of this season as that seemed to help the previous season, but was only partial help for one engine. I also think (but not sure) that I used stabile after my last run of last season, but am not sure of this or if it was seafoam instead. also not confident it was mixed in well and reached the engines (my bad)
Candoopro shows no codes - stoping the coils one by one is inferring two cylinders (#2 & #3) of the 3 are possibly to blame (am shocked it could run this way, so my inference may be full of it) Am reaching this conclusion because it runs like crap with no overrides, but if i kill coil #1 it quickly dies but if I kill #2 or #3 it continues to run like crap - hard part is that it dies very often so its hard to make any conclusions - but above was reproduced several times. At idle Crandoopro reported: intake temp 106,engine temp 171, exhaust temp 120, battery voltage 13.3, intake pressure 8.3PSI, TPS 0%, RPM 1909.
Am thinking fuel injectors getting gummed up, but its a guess - they all buzz with crandoopro override. Today in a brief glimmer of hope, we had them at about 6-7k RPM, running great for about a minute even hit 45mph, but then after I dropped back to 2-5k rpm and it went back to running 500-2000 RPM below the other engine's RPM and stalling
Any ideas of things to check? By the way what is the intake pressure in candoopro supposed to be representing, I presume not fuel as its only around 7.5-8.3 PSI (which matches the other engine) Will put in fresh gas next outing, but i don't expect that to solve the issue as the port engine is almost back to 100%, it never stalls but has a few hundred RPM fluctuation at times. Sparks are dry, with a bit of a yellow dust, will try some new plugs, but the engines only have 72hrs on them, so not confident that will help.
Any recommendations on place to get the injectors?
thanks
Background: Seems it did not like sitting in the garage for the winter (mild az winter - only did the seasonal oil+filter change and coolant change) - Am suspecting fuel issue - Engines are 2007 normally aspirated and only have 72hrs total. Last year I had the same issue on first day of the season, it was with both and after running them for about 30 minutes all was well for the rest of the season. BUT this year its been a few hours with only one doing much better (port side) and the starboard is still dying very easily when I reduce the RPMs to 3k or less (at random.) It also has the RPMs lower than the port engine with short exceptions where it suddenly has the same RPMs, then drops back to 500-2k rams less (more dealt at higher RPMs.)
Note: I did use a can of seafoam on a half tank of gas (2ish gallons) at the start of this season as that seemed to help the previous season, but was only partial help for one engine. I also think (but not sure) that I used stabile after my last run of last season, but am not sure of this or if it was seafoam instead. also not confident it was mixed in well and reached the engines (my bad)
Candoopro shows no codes - stoping the coils one by one is inferring two cylinders (#2 & #3) of the 3 are possibly to blame (am shocked it could run this way, so my inference may be full of it) Am reaching this conclusion because it runs like crap with no overrides, but if i kill coil #1 it quickly dies but if I kill #2 or #3 it continues to run like crap - hard part is that it dies very often so its hard to make any conclusions - but above was reproduced several times. At idle Crandoopro reported: intake temp 106,engine temp 171, exhaust temp 120, battery voltage 13.3, intake pressure 8.3PSI, TPS 0%, RPM 1909.
Am thinking fuel injectors getting gummed up, but its a guess - they all buzz with crandoopro override. Today in a brief glimmer of hope, we had them at about 6-7k RPM, running great for about a minute even hit 45mph, but then after I dropped back to 2-5k rpm and it went back to running 500-2000 RPM below the other engine's RPM and stalling
Any ideas of things to check? By the way what is the intake pressure in candoopro supposed to be representing, I presume not fuel as its only around 7.5-8.3 PSI (which matches the other engine) Will put in fresh gas next outing, but i don't expect that to solve the issue as the port engine is almost back to 100%, it never stalls but has a few hundred RPM fluctuation at times. Sparks are dry, with a bit of a yellow dust, will try some new plugs, but the engines only have 72hrs on them, so not confident that will help.
Any recommendations on place to get the injectors?
thanks
