Give me some input
Thread Starter
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Cargo Master
Joined: Dec 2005
Posts: 2,296
Likes: 11
From: freeland, mi
More info with a question. Coming into work today I was watching the ECT and EOT temps, the ECT upon leaving the house ranged from 210-250 (thermostat closed guessing??) the EOT when I turned that reading on were about 100. Cruising in at about 8 miles into the trip suddenly ECT drops to 134(guessing t-stat opens???) never really goes above that. EOT 155 give or take. Overall trip is 10 miles. EBP was 170 to 230 if that reading is even important. My question is if the trucks not seeing a 190-210 temp reading could the EBPV be opening and closing choking the truck off thinking it needs to warm up?
Hotshot
Joined: Mar 2014
Posts: 10,750
Likes: 1,065
From: Douglassville, PA
I have a similar problem in only the 40-55 mph range. There is zero boost for me in this MPH (I have a gauge that is plumbed to the map sensor). Under 40 MPH or above 55 mph no issue. If I turn off the overdrive, it works like it should. This is something I would like to correct as well.
Hotshot
Joined: Mar 2014
Posts: 10,750
Likes: 1,065
From: Douglassville, PA
More info with a question. Coming into work today I was watching the ECT and EOT temps, the ECT upon leaving the house ranged from 210-250 (thermostat closed guessing??) the EOT when I turned that reading on were about 100. Cruising in at about 8 miles into the trip suddenly ECT drops to 134(guessing t-stat opens???) never really goes above that. EOT 155 give or take. Overall trip is 10 miles. EBP was 170 to 230 if that reading is even important. My question is if the trucks not seeing a 190-210 temp reading could the EBPV be opening and closing choking the truck off thinking it needs to warm up?
Thread Starter
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Cargo Master
Joined: Dec 2005
Posts: 2,296
Likes: 11
From: freeland, mi
Ok I am guessing the EBP reading may be inaccurate since it's so far off. I've heard the EBPV working on this truck a few times last week when it was cooler out. But not when I had low boost or power. I'm thinking a t-stat as well is in the near future. Hoping to get the EGT gauge drilled and installed tonight along with my mechanical boost gauge.
Lead Driver
Joined: Sep 2005
Posts: 9,399
Likes: 188
From: Norco,CA
Well at only 1700 RPM's take it out of over drive. If you had a tuner it would already be out of over drive. You are louging it to much. RPM's means boost and torq in these engines. You need to be in the power setting of these engines. With out horses step on it for a little bit and tell us what you boost is. Stock should be between 16 and 18 psi. If you can get this that is okay. Now that is max.
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Cargo Master
Joined: Dec 2005
Posts: 2,296
Likes: 11
From: freeland, mi
Ok here's some more info, coming home last night trucks running fine slow down to turn corner and no power limped it home the last 5 miles slowly losing speed with only being able to accelerate up to about 30 mph and not build any significant rpm's. stopped in the driveway sits and idles but the injector knock seemed loud. Unplugged map no change. Plugged map back in and unplugged icp seemed to idle a little better, run it down the road powers a little better but still not where it's suppose to be. Shut truck off plug icp back in, restart and it's running normal. Took it for ride and with the exception of just a little miss or hesitation above 2300-2400 rpm trucks running fine and has good power. So to sum it up I shut the truck and restarted it and it's running normal. Is there a limp mode on these like the duramax has? I didn't think they had the technology for that.
Hotshot
Joined: Mar 2014
Posts: 10,750
Likes: 1,065
From: Douglassville, PA
I haven't reread the whole thread so forgive me if it's asked and answered...but what you have sounds like debris getting sucked up against the fuel pickup in your tank. When you shut the engine down it falls off only to get sucked back up again when running.
Lead Driver
Joined: Sep 2005
Posts: 9,399
Likes: 188
From: Norco,CA
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More Turbo
Joined: Nov 2016
Posts: 545
Likes: 2
From: SGV SoCal
I think you may have fuel issue. I would check the TPS first. As for boost it takes demand and RPMs to build boost. You can cruse around at 60 MPG at almost no boost. Wind it up to 2500 RPM if you are looking for power. I can run up a grade on cruse control on in overdrive at about 1700 RPM at about 7 psig at 60MPH with a light load. If I take off the overdrive, the RPM jump up to about 2200 rpm the boost jumps up to over 18 PSIG and the EGT fall about 150 deg. You need to be able to measure the fuel pressure.
Posting Guru
Joined: Oct 2012
Posts: 1,910
Likes: 2
From: Hat Creek Ca
The best way is to install a gauge (one that will read to at least 70-80 PSI) at the fuel bowl. IIRC normal pressure should be ~60 PSI. If no joy there check fuel pump outlet, (maybe plugged line) then check for "vacuum" leaks at fittings ETC. back to the tank.
Thread Starter
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Cargo Master
Joined: Dec 2005
Posts: 2,296
Likes: 11
From: freeland, mi
My scan gauge reads TPS and what I found is cruising 35-40% floor it and it goes to 99 let off it drops to zero. Thinking that's working correctly. Now took the truck to a friends tonight and put his snap-on scanner on it. No codes but he noticed the waste gate didn't seem right. We put a new one on and my boost seems to be restored to normal. I will verify that better as soon as I can hook the trailer to it. His gut feeling is my issue could be CPS so I threw a new motor craft CPS in it tonight. Working to get a fuel pressure gauge coming and then I can verify fuel pressure. Keep you guys posted.
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Cargo Master
Joined: Dec 2005
Posts: 2,296
Likes: 11
From: freeland, mi
Auto Meter 4312 Gauge Fuel Pressure 2 1/16" 100psi Mechanical Ultra-Lite | eBay
Work for fuel pressure?
Work for fuel pressure?
More Turbo
Joined: Nov 2016
Posts: 545
Likes: 2
From: SGV SoCal
Yes, but, that's a mechanical gauge. If you use it, you would be bringing fuel into your cab at about 60 Psig. Things could go bad in a big way (at lest its not gas). I would use one with a electric sender instead. I installed a gauge set from Glow shift. They are not the best money can buy, but they will get the job done. You will likely get more bag for the buck if you pickup a set of gauges, you just have to decide which ones you need, Ext temp, fuel pressure at a min.