Updating cummins isc engine cap pump and problems

Posted by / 08-May-2020 15:48

I just picked up a dump truck that has the 8.3 Cummins. If it's an older truck with an inline pump you should be golden for quite a while!

Does anyone know of any pros or cons of this engine? On the other hand if it has the CAPS pump you could be in for some $$$.

No real powerhouse, but gobs of torque and the p-pumped engines are pretty problem free One of the companies i contract for has a couple of old tandem dumptrucks with C8.3s and autos behind them, they are all nearing the 7 digit mark on the odometer and the trucks are toast but the engines and trannies are still top notch.

(ill probably be swapping one into my deuce) Only issue i found with the 8.3/auto was that they tend to eat the throttle/TV cable linkage on the pump, it was a pretty chitty design...

It is a proprietary Bosch fuel pump and replacement will cost between 00.00 and 00.00. twobachs wrote: Every once in a while the engine will hesitate or buck so I had Cummins service the engine and check the problem.

The symptom you are describing is air in the system, the on board system of removing air doesn't get it all.

Beginning in 1998, Cummins introduced the ISC based off the earlier mechanical 8.3 C-series engine.

The original ISC engine featured a Cummins Accumulator Pump System (CAPS).

A lift pump is located on the engine block, or in your fuel tank, depending upon year of make.

Not only does it offer great fuel economy, the maintenance schedule is very forgiving.

Besides such options as a factory exhaust brake, the Cummins ISC engine is supported by Cummins dealers all across the nation.

When your lift pump gets below 5 psi, start looking for a replacement to save big $$$.

I think the 329 code is for your Cummins Accumulator Pumping System (CAPS) injection pump or VP-44 fuel injection pump and is different than the lift pump.

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If so, then yes there has been a lot of problems with them leaking. The ease of replacing depends on if you can get to the pump from the top of the motor or have to go at it from underneath. Not an isc -but I did have to replace the fuel pump on my ISB - ouch., The fuel pump is a vp44 (I think) and it has a history of failures. No problems since, work was done over 5k miles ago. If so, then yes there has been a lot of problems with them leaking. The ease of replacing depends on if you can get to the pump from the top of the motor or have to go at it from underneath. Every once in a while the engine will hesitate or buck so I had Cummins service the engine and check the problem.

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