volver
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- Moline, IL.
Short story: multifuel starts with a miss, smokes white, a slight miss can be heard under load, low on power, runs hotter than normal. You would think a stuck injector but all Injectors pop test fine. Odd. Any ideas?
Long story: The Hydraulic Head cracked 100 miles from home. I leaked 50 gallons of fuel on the highway at 40 miles an hour all the way home. Truck ran out of fuel 2 block from my house. 3 of the injector lines were leaking at the HH.
I replaced the HH with one from a used pump. Why was this pump taken out of service?
Engine starts and runs. Truck can now do work. Something is different and wrong.
If the engine is shut down for an hour or more it starts with a miss. Fires right off within one revolution, but misses for a second or 2. Then the miss goes away. At idle the engine smokes white even at operating temperature.
When accelerating the exhaust tone has a miss. Engine doesn't shake. Just sounds different. Also engine is down on power. Engine temp comes up faster than normal and is running 15 degrees warmer.
No mixing of fluids in the engine, I refueled with straight diesel, I changed the filters, electric fuel pump works, I sprayed seafoamed directly into a freely spinning turbo, I reset the valve lash, I pulled the injectors and brushed carbon from the tips and ports in the heads, I pop tested the injectors all are opening at 3500psi good pattern no leaks, I compression tested with engine warm and found each cylinder at 525psi. I checked timing the crank and pump line up the indexed tooth on the HH is one tooth past the mark as it should be.
I reinstalled the injectors and strated the engine and ran till warm. I shut the engine down. I restarted the engine 2 hours later. the miss at start still occurs, the smoke is less but still present, haven't tested under load yet.
I'm thinking the used hydraulic head has something wrong with it. What do you diesel experts think I should try next. Really the HH is the only thing in the equation that has changed. Unless limping it home broke something. I'm getting frustrated.
Thanks,
Matt
Long story: The Hydraulic Head cracked 100 miles from home. I leaked 50 gallons of fuel on the highway at 40 miles an hour all the way home. Truck ran out of fuel 2 block from my house. 3 of the injector lines were leaking at the HH.
I replaced the HH with one from a used pump. Why was this pump taken out of service?
Engine starts and runs. Truck can now do work. Something is different and wrong.
If the engine is shut down for an hour or more it starts with a miss. Fires right off within one revolution, but misses for a second or 2. Then the miss goes away. At idle the engine smokes white even at operating temperature.
When accelerating the exhaust tone has a miss. Engine doesn't shake. Just sounds different. Also engine is down on power. Engine temp comes up faster than normal and is running 15 degrees warmer.
No mixing of fluids in the engine, I refueled with straight diesel, I changed the filters, electric fuel pump works, I sprayed seafoamed directly into a freely spinning turbo, I reset the valve lash, I pulled the injectors and brushed carbon from the tips and ports in the heads, I pop tested the injectors all are opening at 3500psi good pattern no leaks, I compression tested with engine warm and found each cylinder at 525psi. I checked timing the crank and pump line up the indexed tooth on the HH is one tooth past the mark as it should be.
I reinstalled the injectors and strated the engine and ran till warm. I shut the engine down. I restarted the engine 2 hours later. the miss at start still occurs, the smoke is less but still present, haven't tested under load yet.
I'm thinking the used hydraulic head has something wrong with it. What do you diesel experts think I should try next. Really the HH is the only thing in the equation that has changed. Unless limping it home broke something. I'm getting frustrated.
Thanks,
Matt
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