Join Date: Jul 2019
Location: Fort Collins, CO
Feedback Score: 0 reviews
The IDI non-turbo is not a power-house to begin with. If you were expecting it to feel like a PowerStroke, I can see why you would think it was broken. The naturally aspirated 7.3 IDI only makes 165 HP compared to the 215 HP in the next year Powerstroke. I have a 1993 IDI and the first thing I did was replace injectors and put an aftermarket turbo on it to deal with the power issues and the smoking. Good news, injectors for the IDI are fairly cheap, if that is your problem. How many miles are on the engine, and are they the original injectors? Black smoke signifies unburned fuel, and could be bad injectors not atomizing the fuel very well. Could also be you have a bad cylinder with low compression. When you crank the engine over to start, is it a hard start? Does it spin at an even speed, or does it sound like it speeds up slightly in a spot in the rotation? Is your air filter clean and free of any possible obstruction? Another thing I always do to kill black smoke is run a CETANE additive. It helps with the power and the smoking as it causes the fuel to ignite sooner and burns more completely. Bottom line though, the truck is not ever going to be as strong as the Powerstroke. Super easy and cheap to repair, and pretty bulletproof, but not anywhere near as strong. The IDI is a pretty great engine, but you are going to learn patience waiting for it to get up to speed.
Last edited by Ozhold; 07-24-2019 at 04:06 PM.
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