fedexmack Posted November 4, 2015 Share Posted November 4, 2015 Purchased the truck in Feb 2015 and have had nothing but trouble since. Complete motor rebuild...all new computer...EGR system...turbo...you name it...it's been replaced. With that being said it still doesn't want to pull. Any suggestions as to what may be the problem???? It is a Mack Vision 350 turned up to a 427. Runs great a few weeks then decides she doesn't want to pull... Quote Link to comment Share on other sites More sharing options...
Challenger Posted November 4, 2015 Share Posted November 4, 2015 Things I would look at-Are there any codes?Fuel pressureBoost pressureI use an air pressure gauge to test fuel and boost pressure, green for fuel and orange for boost. Quote Link to comment Share on other sites More sharing options...
fedexmack Posted November 4, 2015 Author Share Posted November 4, 2015 Code 45 came up once after having the EGR replaced...cant find any information as to what that code is. Hasn't been back on since. Fuel and boost pressure is fine. Quote Link to comment Share on other sites More sharing options...
Challenger Posted November 4, 2015 Share Posted November 4, 2015 Blink code 4-5 is for turbo VGT system not responding. Was the turbo calibrated after replacement? If you're sure the fuel and boost are fine, then I would think updating the EECU and VECU software would be a good idea. But since you replaced the EECU it shouldve been programmed with updated software. Did they update the VECU at the same time as replacing the EECU? Quote Link to comment Share on other sites More sharing options...
fedexmack Posted November 4, 2015 Author Share Posted November 4, 2015 They did update both VECU and EECU...at the moment I can't remember if the turbo was replaced before or after that. Quote Link to comment Share on other sites More sharing options...
fedexmack Posted November 4, 2015 Author Share Posted November 4, 2015 I've had so much go wrong with it that I can't remember when it all happened. Quote Link to comment Share on other sites More sharing options...
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