Slogan711 Posted October 8, 2016 Share Posted October 8, 2016 Hello everyone. I need some help on where to start for diagnosising my 99 CL713's smoke issue. I need to pass my smoke test ASAP. this is my first truck and I'm still learning a lot about the buissnes and equitment so all advice is greatly appreciated. She runs good and doesn't smoke all the time. Mostly right after i shift and and when the rpms are low. But once the rpms pick up she stops smoking. To me it feels like she's dumping to much fuel but once the rpms rise and burn it off she's good. Its black smoke the truck doesn't burn oil, I'm not losing any coolant and I get good fuel mileage. A buddy of mine suggest fuel injectors and a tune?. I can afford to take it to the dealer just yet so if there's a way I can check to see if in fact I do need injectors how do I do so. I'm mechanicaly inclined and do most of my repairs but don't know much about do actual work to the motor. And another person suggested it could be a bad piston ring as well. Thanks on advance for the help Quote Link to comment Share on other sites More sharing options...
alex g Posted October 8, 2016 Share Posted October 8, 2016 It doesn't sound like excessive smoke to me. A 99 is gonna throw a bit of smoke. I would check air filter and take for the test. It will probably pass. Sent from my SM-G386W using Tapatalk 1 Quote Link to comment Share on other sites More sharing options...
BGarofalo Posted October 8, 2016 Share Posted October 8, 2016 Start by checking for intake restrictions, boost leaks, inspect turbo compressor wheel. Boost leaks are a bit tough to check for if you don't have an appropriate tool. Focus on intercooler boots and intercooler. 1 Quote Link to comment Share on other sites More sharing options...
felicello122 Posted October 8, 2016 Share Posted October 8, 2016 What motor you got? Quote Link to comment Share on other sites More sharing options...
Ezrider Posted October 12, 2016 Share Posted October 12, 2016 mine is a 2000 and it throws some smoke between gears. its normal for pre emissions trucks to blow a little smoke between gears. as long as it clears right up as the boost biulds egt's are running cool and your not blacking out the sun probably nothing wrong. 1 Quote Link to comment Share on other sites More sharing options...
gearhead204 Posted October 12, 2016 Share Posted October 12, 2016 (edited) you could also try running "power service" in the gray jug, it has a cetane booster and also an injector cleaner additive, this may help reduce the smoke as well. Alot of the fuel we get doesn't have the cetane rating that the engine was designed to run with. cetane is to diesel, what octane is to gasoline It helps both my e9 run cleaner as well as all my diesel farm tractors Edited October 12, 2016 by gearhead204 Quote Link to comment Share on other sites More sharing options...
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