JeffM31 Posted July 15, 2023 Share Posted July 15, 2023 (edited) Hello everyone, I have a weird issue that may be no issue at all. My 400 ISL has zero power until it hits 35mph then bammmm. The odd part is after you turn it off and back on a time or two the power is back. I got it to operating temp just to be sure it wasn’t a built in safety but it still did the same thing. All filters are brand new and yes it did the same with the old filters. One other thing I noticed was Aladdin read like 6 psi and the dash gauge was around 28. Thoughts? Edited July 15, 2023 by JeffM31 Link to comment Share on other sites More sharing options...
JDCrow Posted July 15, 2023 Share Posted July 15, 2023 (edited) Sticky Turbo? Anyway to check the boost? Edited July 15, 2023 by JDCrow 1 Link to comment Share on other sites More sharing options...
JeffM31 Posted July 15, 2023 Author Share Posted July 15, 2023 3 minutes ago, JDCrow said: Sticky Turbo? Anyway to check the boost? I’ve just been watching Aladdin and the gauge. I’m leaning towards the map/boost sensor Link to comment Share on other sites More sharing options...
Upsman85 Posted July 15, 2023 Share Posted July 15, 2023 (edited) Map boost sensor!! I had to replace mine . Edited July 15, 2023 by Upsman85 Link to comment Share on other sites More sharing options...
JeffM31 Posted July 15, 2023 Author Share Posted July 15, 2023 Just now, Upsman85 said: Map boost sensor!! I had to replace mine . Awesome. That’s what I’m definitely leaning towards. I think I’ll just do it. Thank you Link to comment Share on other sites More sharing options...
Ivan K Posted July 15, 2023 Share Posted July 15, 2023 22 minutes ago, JeffM31 said: one other thing I noticed was Aladdin read like 6 psi and the dash gauge was around 28. Thoughts? I don't have your engine or Aladdin but here is what I see as a potential problem. My dash gauge has a air line to intake manifold reading the boost. ECM is using an electronic boost sensor. You appear to have a BIG mismatch that makes me suspect your sensor. 1 Link to comment Share on other sites More sharing options...
JeffM31 Posted July 15, 2023 Author Share Posted July 15, 2023 3 minutes ago, Ivan K said: I don't have your engine or Aladdin but here is what I see as a potential problem. My dash gauge has a air line to intake manifold reading the boost. ECM is using an electronic boost sensor. You appear to have a BIG mismatch that makes me suspect your sensor. 100% Link to comment Share on other sites More sharing options...
BradHend Posted July 15, 2023 Share Posted July 15, 2023 I would agree with a sensor or a leak somewhere, but strange that the ECM isn’t picking this up and turning on a warning light. Have you hooked up a code reader by chance? 1 Link to comment Share on other sites More sharing options...
JeffM31 Posted July 15, 2023 Author Share Posted July 15, 2023 2 minutes ago, BradHend said: I would agree with a sensor or a leak somewhere, but strange that the ECM isn’t picking this up and turning on a warning light. Have you hooked up a code reader by chance? No I haven't. Yep no check engine or anything on Link to comment Share on other sites More sharing options...
96 EVO Posted July 15, 2023 Share Posted July 15, 2023 Does your Aladdin remain showing 6psi boost for a long time after your dash boost gauge goes to 28psi? I find my Aladdin a little slow to respond changes. Link to comment Share on other sites More sharing options...
JeffM31 Posted July 15, 2023 Author Share Posted July 15, 2023 2 minutes ago, 96 EVO said: Does your Aladdin remain showing 6psi boost for a long time after your dash boost gauge goes to 28psi? I find my Aladdin a little slow to respond changes. Yes it’s super slow. Link to comment Share on other sites More sharing options...
96 EVO Posted July 15, 2023 Share Posted July 15, 2023 (edited) I also have a Scan Gauge, and while idling the engine, can see the coolant temp increase by about 5F before the Aladdin reports any increase. Edited July 15, 2023 by 96 EVO Link to comment Share on other sites More sharing options...
BradHend Posted July 15, 2023 Share Posted July 15, 2023 Spewing out any soot at all? 1 Link to comment Share on other sites More sharing options...
JeffM31 Posted July 15, 2023 Author Share Posted July 15, 2023 1 hour ago, 96 EVO said: I also have a Scan Gauge, and while idling the engine, can see the coolant temp increase by about 5F before the Aladdin reports any increase. I need to get a Scan Gauge 5 minutes ago, BradHend said: Spewing out any soot at all? Nope small normal puffs here and there. Link to comment Share on other sites More sharing options...
Greg Coffey Posted July 16, 2023 Share Posted July 16, 2023 I had a similar issue. When I step on the throttle/foot pedal, It would not hardly respond until I got moving a little and then whamo, it takes off. I see yours wont respond properly until you get more speed. Not sure if its the same issue but mine was my throttle,,, its a Throttle Position Sensor fault,,,TPS. The footfeed is electronic,, I replaced it and all is well. Best of luck. Link to comment Share on other sites More sharing options...
JeffM31 Posted July 16, 2023 Author Share Posted July 16, 2023 40 minutes ago, Greg Coffey said: I had a similar issue. When I step on the throttle/foot pedal, It would not hardly respond until I got moving a little and then whamo, it takes off. I see yours wont respond properly until you get more speed. Not sure if its the same issue but mine was my throttle,,, its a Throttle Position Sensor fault,,,TPS. The footfeed is electronic,, I replaced it and all is well. Best of luck. Thank you Link to comment Share on other sites More sharing options...
Brad Kruchten Posted July 17, 2023 Share Posted July 17, 2023 I have the same engine, and the same year. I took my turbo off this winter to have it looks over. My variable vane was very sticky. I would suggest calling Fair Valley Performance in Sauk City, WI. 608-643-0200. They will be happy to ck it over for you. That is not a cheap turbo, so having yours run through the shop would be a good thing. I run Cen-Pe-Co Diesel Max fuel additive all the time as well now and you will pick up a very small amount of HP and fuel mileage. But more importantly will lube the pintel in the injectior and have a cleaner burn and less carbon to make the vane stick. 2005 Monaco Dynasty Diamond IV. Link to comment Share on other sites More sharing options...
JeffM31 Posted July 19, 2023 Author Share Posted July 19, 2023 Installed a new map/boost sensor. Driving it Sunday and I’ll let you guys know if the problem is gone or not. Link to comment Share on other sites More sharing options...
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