Onan 5500 Backfires and Dies under a load
Good Morning.. Im hoping to find the Onan guru's that are here... For the past year I have been searching for answers and replacing parts with no improvement.
I have an Onan 5500 with less than 100 hours in my toyhauler. It began backfiring and then dying when a load was placed on it. I have so far replaced the carb, fuel pump and filter, fresh gas directly from beneath the gen. Once it starts backfiring, if the load is stopped, it continues to "put put backfire" until it dies then gives an overheated exhaust code (I assume from the backfiring?). Plugs were replaced, now currently testing to see if there is spark to both plugs. Please someone help me solve this issue!!! I'm in BFE Alaska in a perm set up, there's no ONAN tech here so I'm on my own... Thanks for ideas and suggestions!!
UPDATE: replaced one of the new spark plugs with another new (wasn't sparking well) and took out the plug in the exhaust, now it works great! Can I leave the plug out? Ive been told its the spark arrestor, sounds like an important part to me, HAHA. Could this mean there is a blockage in the tail pipe?
I have an Onan 5500 with less than 100 hours in my toyhauler. It began backfiring and then dying when a load was placed on it. I have so far replaced the carb, fuel pump and filter, fresh gas directly from beneath the gen. Once it starts backfiring, if the load is stopped, it continues to "put put backfire" until it dies then gives an overheated exhaust code (I assume from the backfiring?). Plugs were replaced, now currently testing to see if there is spark to both plugs. Please someone help me solve this issue!!! I'm in BFE Alaska in a perm set up, there's no ONAN tech here so I'm on my own... Thanks for ideas and suggestions!!
UPDATE: replaced one of the new spark plugs with another new (wasn't sparking well) and took out the plug in the exhaust, now it works great! Can I leave the plug out? Ive been told its the spark arrestor, sounds like an important part to me, HAHA. Could this mean there is a blockage in the tail pipe?
