Diesel Fuel Injection System Help Desk

**rotber** · May 13th, 2008 11:52 PM

Sir Dieseldude,

Is there any instrument to test the pressure delivery of injection pump without removing from the engine? Can we put the test instrument and run the engine so that we can determine if the pressure is still in the manufacturers spec?

Thanks again sir.

**Dieseldude** · May 14th, 2008 11:02 AM

Originally Posted by rotber

Sir Dieseldude,

Is there any instrument to test the pressure delivery of injection pump without removing from the engine? Can we put the test instrument and run the engine so that we can determine if the pressure is still in the manufacturers spec?

Thanks again sir.

Delivery pressure is controlled by the injectors, not the pump. What's most important is the pump's fuel output quantity and governed speed, which can only be measured through our Bosch test bench.

Btw, if you changed your engine from petrol to diesel, I would recommend that you check your fuel suction line from tank-to-pump as it may be too small. The in-tank pipe of an original petrol engine would normally be smaller than that of an original diesel fuel tank. Diesel engines have bigger diameter suction pipes than petrol engines due to the larger flow of fuel which is mostly returned back to the tank.

Your injection pump may just be starved of fuel.

Bye

**carlogt** · May 30th, 2008 01:28 PM

Sir Dieseldude my ride is a '99 hilander slx.odometer is at 82000km. got it calibrated 2 years ago. Ngayon mejo mausok na (white smoke) kahit idling lang kita mo white smoke comin out of the tailpipe. Sabi mechanic na kakilala ko ok naman daw takbo at hatak naman. mejo lang mausok tlga. And ung usok di lang pag umaga nag start so di sya cold start lang. Do you think injector tips need cleaning? san ba ok magpalinis nito? sabi din mechanic ko try ko bumili orig na airfilter kse replacement lang nlagay ko.

appreciate your help sir..

**carlogt** · May 30th, 2008 01:46 PM

good shop in alabang/taguig/makati area?

Originally Posted by carlogt

Sir Dieseldude my ride is a '99 hilander slx.odometer is at 82000km. got it calibrated 2 years ago. Ngayon mejo mausok na (white smoke) kahit idling lang kita mo white smoke comin out of the tailpipe. Sabi mechanic na kakilala ko ok naman daw takbo at hatak naman. mejo lang mausok tlga. And ung usok di lang pag umaga nag start so di sya cold start lang. Do you think injector tips need cleaning? san ba ok magpalinis nito? sabi din mechanic ko try ko bumili orig na airfilter kse replacement lang nlagay ko.

appreciate your help sir..

**Dieseldude** · May 31st, 2008 03:06 PM

Sir Dieseldude my ride is a '99 hilander slx.odometer is at 82000km. got it calibrated 2 years ago. Ngayon mejo mausok na (white smoke) kahit idling lang kita mo white smoke comin out of the tailpipe. Sabi mechanic na kakilala ko ok naman daw takbo at hatak naman. mejo lang mausok tlga. And ung usok di lang pag umaga nag start so di sya cold start lang. Do you think injector tips need cleaning? san ba ok magpalinis nito? sabi din mechanic ko try ko bumili orig na airfilter kse replacement lang nlagay ko.

appreciate your help sir

If you are sure on the condition of your engine, this problem is most probably injection pump related. Cleaning your nozzles is fine, but I don't think this will correct your white smoke concern.

Air filter replacement will not also help as your engine smokes white even at low idle. A restricted air filter will cause and engine to smoke black at high speeds when the engine demand for air is large.

**carlogt** · June 2nd, 2008 04:01 PM

napansin ko lang di naman tumakaw sa diesel,mejo mausok lang na puti. if injection pump, calibration usually solves this sir?

**carlogt** · June 2nd, 2008 04:43 PM

napansin ko lang di naman tumakaw sa diesel,mejo mausok lang na puti. if injection pump, calibration usually solves this sir?

**Dieseldude** · June 3rd, 2008 12:10 PM

Originally Posted by carlogt

napansin ko lang di naman tumakaw sa diesel,mejo mausok lang na puti. if injection pump, calibration usually solves this sir?

White smoke could be caused by the following:

incorrect injection pump to engine timing
faulty fuel injection system
faulty engine

If your engine is worn, calibrating the injection pump will not cure your problem.

**dcarin14** · June 8th, 2008 10:37 AM

Sir Dieseldude, ask ko lang if you will recommend any additive like Liqui Moly for example as injector cleaner? performance additive?

If yes, any other brand that you will also recommend? My ride is Pajero FM 4m40. This may be overkill but if doesnt't hurt the engine but additional help for performnace at dahil na rin sa condition ng road at diesel fuel sa Phils, I will go for it.

Appreciate your input.

**dcarin14** · June 8th, 2008 10:38 AM

Sir Dieseldude, ask ko lang if you will recommend any additive like Liqui Moly for example as injector cleaner? performance additive?

If yes, any other brand that you will also recommend? My ride is Pajero FM 4m40. This may be overkill but if doesnt't hurt the engine but additional help for performnace at dahil na rin sa condition ng road at diesel fuel sa Phils, I will go for it.

Appreciate your input.