shawn76

16 hours ago, toodeep said:

 

we do wait to let fuel pump and everything get ready getting new plug and just ordered a new coil pack the spark looked a little week and inconsistent also pulled injector and checked spray pattern it is good and compression is good and battery is 100% we will see when coil comes in since dealer says they do go week

i have not check timing  it has good compression i will see how to check timing and the spark  its just weird how it starts fine in warm weather only does it in the cold

20 minutes ago, shadetree said:

weather temp has no bearing on why it will or won't start , unless its like 50 below ?..lol. the 420's are fuel injected, they have a fuel pump, which is very common to go out, last but not least, they have a fuel injector at the throttle body. could be a dirty fuel injector ?, maybe need a new spark plug ?, there are different spark plugs for different heat ranges, although..heat ranges and temperatures has nothing to do with it not starting. put some fuel injector cleaning stuff in the tank, run it a bit if you can get it to start ?, this may help the fuel injector. also try a new spark plug. worse case ?, the fuel pump is getting to weak to allow fuel pressure to the fuel injector.

i know its fuel injected have tried fuel injector cleaner and new oem plug  it floods itself out so its getting fuel and there is spark and only happens when below 30degrees out and running 87 octane fuel its spraying to much fuel  

anybody have any idea why this machine floods it self out when cold out if it 35 degrees plus it starts below it will flood itself out need to pull plug then blow fuel out of cylinder then starts if in a warm garage

seems like its getting to much fuel thanks in advance