Quote Originally Posted by Dieseldude View Post
Good day Sir DD,

Problem here: Isuzu Elf truck 4GG1 NA engine. This is the first time I hear about an Isuzu 4GG1. Could it be a 4JG1? Is this an electronic engine?

No hard starts. Practically no smoking on idle but smokes a little "off white" on highway runs especially on acceleration. Sluggish power on acceleration producing that kind of smoke. Was any previous work done on this engine that may have caused this problem?

One specialist quoted P20k on calibration. A good price? I really don't know as I've never heard of this engine type.

Thanks in advance for any comment and suggestion. Check pump to engine timing.
Oops. Sorry sir. 4HG1. had a talk with the driver-operator recently. the unusual smoking and sluggish power occured after filling-up with diesel. drained the fuel filter-separator. still there is white smoke. I suspect a water contamination problem with the fuel station. will fill up again another batch of diesel and see what happens.

no previous work done on the vehicle except the regular oil and filters(oil, air, fuel) replacement. it was a surplus unit and running for 2 years now. the problem occured last week.

thank you sir