Recent content by Keith_J

How things change..30 years ago, mechanics couldn't understand electronic and computer controlled drive trains. I do both, country and western ;)

They appear to be serviceable replacements. Like most offshore parts, they are copies with variable quality from OE items. But they can work. I've bought starters for my vehicles which came with full test reports and work like new. In my car, the new starter cured the problem with an Auto...

Definitely a fuel flow issue. Does it do this only in motion? Or can you replicate the problem with holding the brake and opening the throttle? The injection pump is quite simple. In a diesel engine, power is controlled solely by injected quantity. In this pump, injected quantity is...

If you have the timing chain cover off, check the chain slack. All diesels are interference engines which could be damaging to at least the push rods. Not that timing chains fail, wear in the set will let you know when to change.

I calibrated mine by first calibrating the speedometer using stop watch and interstate mile markers. Knowing the speedometer is spot on, I then bumped the speed on the flat to 75 MPH. That is 3650 RPM governed with 255 85 16s and stock 4.56 axles. Yes, screaming and dragging the SECM box...

Alternators have at least two poles, most common are 8 to 20, always an even number as there are in pairs, a north and a south pole. With each pole pair, the voltage in the stator coils changes direction but more importantly, this change represents power generation. Higher RPM alternators...

I should have bought one last year..guess I will limp along with a good supply of coolant and distilled water. Edited: Found a CU850 for over 500 dollars. That is a lot of coolant. But pulling my 30 foot travel trailer a 1000 miles next month. Thankfully there is a substantial relocation...

I don't have the specifics on this brand/model. I had success with a VDO brand which can use multiple inputs including an alternator AC output. This tach has multiple switches and a potentiometer to fine tune. The driver side alternator has this output as a push on connector with a brown...

The inefficiency of this diesel engine is not from unburned fuel unless you have white exhaust smoke. Partially burned fuel is black smoke as the hydrogen is first burned. High compression is one key to efficiency, this engine is already high enough. The main heat loss is through the...

It isn't the current which kills starter relays, it is the back current which arcs contacts to an early grave. The current flowing through a solenoid coil creates a magnetic field. When that current is interrupted, the collapse in the magnetic field causes a reverse current, much stronger...

Circle red X that class 2 leak on the injector pump? Then I will put my initials next to it to allow limited operations?

Checked fluids, tire pressures x 5 and started it without drama. Around the block and up to temperature. Ran the PTO generator and ran the air compressor to drive water out of the air tank. Going to make this a weekly PMCS, minus the DA 2404 form.

I've made a 27SI testing rig using a spare plug, a light bulb and an alligator clip. Use a good battery, chuck the alternator in a vise and spin it up with a drill and socket wrench.

The one item which causes the most issue with idle speed is the metering valve. This must react positively with the tiny spring forces yet also negatively with the closing action of the governor centrifugal forces. Then the shut off solenoid must positively counter act all others. The fit of...

The adjustment of the throttle actuator is quite sensitive. Just a few degrees of adjustment on the actuator side makes a world of difference so if you have a frequency droop of more than 5 Hz from no load to just a few kW, bump this up. The droop adjustment won't compensate enough. Remember...