I bought a rebuilt injection pump from Hilbilly Wizard. I decided to have a local diesel performance shop install it. After installation they are trying to sort out a throttle that “binds at about 3/4 open”. They tell me it happens when it’s running, but not when not running. I know it’s a haircut over the phone - but any guesses on what might be the cause?
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New injection pump and binding throttle mystery
- Thread starter Rrent
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See, now they will have to pull it back off and hillbilly wizard will have to send it back to their rebuilder for warranty work.
Next time skip the middle man and have a highly reputable rebuilder reman your pump.
Next time skip the middle man and have a highly reputable rebuilder reman your pump.
Skinny
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Remove cable, push down on skinny pedal, figure out if it's the cable or injection pump.
Rocket Science
Remove cable, push down on skinny pedal, figure out if it's the cable or injection pump.
Rocket Science
The shop is checking that out. Hope is anything but the pump. We will see.?
Remove cable, push down on skinny pedal, figure out if it's the cable or injection pump.
Rocket Science
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Plus it works skinny pedal to pump when the truck isn’t running m.
Turns out:
I had an injection pump and lift pump installed. The throttle was sticking (at about 3/4 open) only when the engine was running. My mechanic found this 14066255 throttle solenoid was extending - but not retracting.
When unplugged the truck seems to run fine. What is it? What does it do? Where can I find one?
I had an injection pump and lift pump installed. The throttle was sticking (at about 3/4 open) only when the engine was running. My mechanic found this 14066255 throttle solenoid was extending - but not retracting.
When unplugged the truck seems to run fine. What is it? What does it do? Where can I find one?
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dependable
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That is fast idle solenoid, it is in circuit with IP timing advance and its purpose is to have faster, lower emissions warm up of cold engine. The part is getting hard to come by, especially at reasonable cost. If you can't find used or rig up a return spring, they cost about $150, last time I saw one.
It is nice to have fully operational, but is not really needed to use truck. One of mine has been non functional for years, truck runs fine, just slower, smokier warm up.
Edit; Also possible solenoid is fine, and the temp sensor on back of head that runs that circuit is faulty. If this is the case, it should be fixed, otherwise timing advance will be stuck on even if fast idle solinoid removed. If sensor is working, you should be able to hear timing back off a few minutes after cold start.
It is nice to have fully operational, but is not really needed to use truck. One of mine has been non functional for years, truck runs fine, just slower, smokier warm up.
Edit; Also possible solenoid is fine, and the temp sensor on back of head that runs that circuit is faulty. If this is the case, it should be fixed, otherwise timing advance will be stuck on even if fast idle solinoid removed. If sensor is working, you should be able to hear timing back off a few minutes after cold start.
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Barrman
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It is easier for people to help you if you keep your problems to just one thread. I just answered your other thread to find the same question and pictures here.
Advance and fast idle both have power - even when the vehicle has warmed up. I unplugged both and started the search (on the truck) for the temp sensor that runs them. I was unsuccessful in my brief search (other things to do on the truck). Are there any tried and true easy to locate and/or change methods, for this sensor?
dependable
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I just checked a CUCV, and the sensor is indeed on drivers side head, in the back, behind the #7 cyl of intake manifold. You can confirm this by checking continuity from fast idle circuit to sensor.
The sensor I remembered on passenger side is on some civy 6.2s, on CUCVs there is a plate blolted in that place.
The sensor I remembered on passenger side is on some civy 6.2s, on CUCVs there is a plate blolted in that place.
I found -what I think/thought- was the glow plug sensor and the oil pressure idiot light [picture], on the back left (driver’s side). I was going to hook-up my oil pressure gauge here. Plan on searching for the sensor (again, idiot light - this one for water temp) on the front also left head.
I hate even that little bit of exposed wire. Maybe a new plug - how hard could that be to find..?
cucvrus
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That is the OEM glow plug sensor. I see you have 2 threads going so NO that does NOT control the fast idle. Someone already said that. But from the looks of that glow plug sensor it needs updated with the new sensor and plug. Check this out. https://www.steelsoldiers.com/threads/glow-plug-temperature-switch.45857/
Looks like the original and the new pigtail have the same wire colors. Out with the old in with the new?