Re: 93 CTD down on power - help!
[Re: A727Tflite]
#2814891
08/29/20 08:45 PM
08/29/20 08:45 PM
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Joined: Mar 2011
Posts: 167 Maryland
ro23_j
member
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member
Joined: Mar 2011
Posts: 167
Maryland
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I have a 91 CTD and I pulled the fuel tank so I could replace all of the rusted brake lines.
I found that the fuel supply line had some pinholes from rust and was seeping fuel. Also, the vent on top of the tank appeared to be blocked with dirt. I replaced the fuel line and cleaned the vent and when I drove it for the first time, it was like a new truck. The last time I towed with it before I replaced the brake lines, it felt like it was down on power.
My assumption is that it was either sucking air through the rusted supply line and/or the vent was not allowing enough air into the tank. Might be worth a look.
Last edited by ro23_j; 08/29/20 08:49 PM.
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Re: 93 CTD down on power - help!
[Re: NITROUSN]
#2814916
08/29/20 09:35 PM
08/29/20 09:35 PM
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Joined: Mar 2011
Posts: 3,103 Michigan
A727Tflite
OP
master
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OP
master
Joined: Mar 2011
Posts: 3,103
Michigan
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Make sure it has full throttle. If an automatic make sure the tranny is full. These are two simple items I have seen with low power complaints. What does trans fluid level have to do with low power? Just wonderin’
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Re: 93 CTD down on power - help!
[Re: A727Tflite]
#2814926
08/29/20 09:51 PM
08/29/20 09:51 PM
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Joined: Jan 2003
Posts: 18,427 UPPER MICHIGAN, MARQUETTE COUN...
NITROUSN
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 18,427
UPPER MICHIGAN, MARQUETTE COUN...
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Make sure it has full throttle. If an automatic make sure the tranny is full. These are two simple items I have seen with low power complaints. What does trans fluid level have to do with low power? Just wonderin’ Ran into a complaint years back. The guy had a rubber transmission line blow off. He never told us the whole story at first. He added some fluid but he did not get it full. The truck was a dog and his complaint was low power. We added several quarts and it was back to normal. I can only attribute the condition to the large converter fluid capacity. Lower fluid did not allow the transmission/converter to make power. It did not act like a low fluid problem. Just a suggestion.
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Re: 93 CTD down on power - help!
[Re: RTSrunner]
#2815007
08/30/20 05:30 AM
08/30/20 05:30 AM
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Joined: Dec 2014
Posts: 5,954 ohio
ruderunner
master
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master
Joined: Dec 2014
Posts: 5,954
ohio
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I've heard that the rubber tip of the KSB can come loose and partially block the incoming fuel.
Angry white pureblood male
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Re: 93 CTD down on power - help!
[Re: NITROUSN]
#2815260
08/30/20 09:56 PM
08/30/20 09:56 PM
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Joined: Dec 2009
Posts: 20,673 in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,673
in a cattle trailer down by th...
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I am not sure on the boost level on the 1st gen trucks. 15 may be close. I doubt it is over 20. Generally if you do not have enough fuel you can not make boost. I have heard of weak lift pumps causing a lack of power. Not sure what the fuel pressure should be for that style lift pump but as long as it has positive pressure to supply the injection pump it should be enough to give the pump all it needs. Dirty of partially plugged injectors could also play in. Mine can hit 36 on a good day. Lack of fuel is the usual culprit. Fuel lines sucking air, weak lift pump and clogged fuel filter are the most likely. When was the last time you changed the fuel filter? Apparently it's still in the future, unless you live in a time warp or something.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion. '74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion. 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: 93 CTD down on power - help!
[Re: A727Tflite]
#2815464
08/31/20 12:12 PM
08/31/20 12:12 PM
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Joined: Dec 2006
Posts: 2,122 Byron, NY
W.I.N. Racing
top fuel
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top fuel
Joined: Dec 2006
Posts: 2,122
Byron, NY
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Is it blowing Any more smoke than normal?? look at the intercooler hoses/tubes. Make sure they are fully connected and not leaking. Also look at the intercooler for leaks.
'01 P1500, Blown/Inj BAE,/Veney ,Bruno/CS2,Dana 60 '01 Dodge 3500 S Cummins Auto, Fresh air kit, 4" Exhaust, '05 Dodge Magnum R/T - Too Much to list '60 Willys CJ5 '01 International LPX - Project,DT466, Allison '64 Plymouth Valiant, Inj 528 Hemi, 2spd
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Re: 93 CTD down on power - help!
[Re: A727Tflite]
#2815646
08/31/20 07:51 PM
08/31/20 07:51 PM
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Joined: Dec 2009
Posts: 20,673 in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,673
in a cattle trailer down by th...
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Still waiting for the expert to call me.
New filter, I can’t get more than 15 boost, all the external air lines and rubber flex connections are good and tight, only some dark smoke on startup. It was never a rocket ship, more like a peppy brick but I pulled twice the load out of Portland in 2013 than I just did and it felt pretty strong then compared to now. Adjust the valves. Check the fuel pressure before and after the filter. Pull the fuel shut off solenoid and inspect it. They have been known for the rubber to come apart and clog the fuel feed to the VE pump. Past that pull the injectors and have them cleaned and pop tested. Remove the intake hose and check the turbo, make sure the blades aren't damaged and it spins freely. Make sure the shaft is tight and the blades aren't scraping the housing.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion. '74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion. 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: 93 CTD down on power - help!
[Re: hemi70se]
#2818032
09/06/20 11:29 PM
09/06/20 11:29 PM
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Joined: May 2003
Posts: 6,570 Downtown Roebuck Ont
Twostick
Still wishing...
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Still wishing...
Joined: May 2003
Posts: 6,570
Downtown Roebuck Ont
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As has been said, check the intercooler. Pull the hoses and plug one end and make up a fitting to clamp in the other end with a valve and a pressure gauge. Air it up to about 30 psi and close the valve. If it loses more than 5 psi in 15 seconds, it's FUBAR. For your problem it would have to have a substantial leak so it should pretty much go to zero as soon as you close the valve. How much fuel pressure? No fuel, no boost, no power. According to this article, 25 psi is minimum. Some good info for both P pump and VE. https://www.dieseltuff.com/instructions/Kevin
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