Pumps BJ40

[gringo1]

Hello,
Well, after an overhaul, and then another valve re-seating, and new points put on the injectors, my BJ40 failed emissions test here in Costa Rica.

We've done everything to the motor we can at this point, and the mechanic says it has to be the pump is faulty which he calls the brains of the injection system.

Anyway, can some of you comment on this, and specify which pump by name he is talking about probably?

Also, what would be the cost of pump?

And down here there is a large Used Parts market which I'd like your opinions about especially with regard to this pump.

Thanks,

Gringo1

 

[Joe Egolf]

Revision Technica is like the gestappo[sp] they are a pain esp to Gringo's.I had good luck with Ramon in Oratina,he was a fair honest cruiser mechanic..Injector pumps are the brains of the 3b and can be expensive ,also vcan be adjusted for fuel/air ratio,check manual or search here??

 

[lostmarbles]

........my BJ40 failed emissions test here in Costa Rica.

Hi Gringo1

I dread the day they start emissions testing here in New Zealand. (We must fight this!)

..............the mechanic says it has to be the pump........................

Personally I don't think you should consider replacing your injector pump unless you know it is faulty.

A brand-new replacement is "out-of-the-question" (astronomical price if you could even get one) and they are VERY expensive even to get overhauled. (And if you go for a second-hand replacement - who's to tell whether it will be any better than your current one?)

If you can't see "continuous black smoke" from your tailpipe under "full power" then I doubt there is much wrong.

Apparently you can adjust the injector pump to reduce the "injected fuel quantities" and thereby improve your emission figures - but I have never done it to mine. Some people even return the setting to the way it was previously once passed their emissions test. (- So I'm told.)

If you don't have some form of workshop manual for your vehicle, I would get one.

 

[rloaderro]

More tips for emissions

Haha - I'm going up against the same thing here this month. I think it's probably pretty rare for any 30 year old diesel to meet modern emissions standards in even the best conditions. The guy I brought it from suggested:

1. Wash the exhaust system with a decently powered water hose while maintaining sufficient throttle to push the water back out. Emissions detectors will supposedly pick up on oil and diesel residues in the line.

2. What lostmarbles said about adjusting the fuel injector. The guy said to wind it down about 4 revolutions before the test, then wind it back up after. The adjustment to the injector reduces the amount of diesel going into the cylinders - I imagine this also affects the power and stuff which is why you'll want to return it to the original setting.

3. Add a bottle of cooking oil to the gas tank. Not sure where this came from but shouldn't harm anything and in fact allow the truck to run smoother through the inspection.

^^^^^^ Can anyone comment on this?!

Anyone know any others?