Gutless 7.3
Thread Starter
|
Freshman User
Joined: Dec 2014
Posts: 39
Likes: 0
Gutless 7.3
Just bought a '99 CCLB 7.3 with 195k on it, 6 speed manual. Chasing a gutless engine situation. Absolutely no power, my 12 valve Cummins that's 10 years older will run circles around this truck right now... I'm very mechanically inclined, but not so electrically... So I need help!
History of the truck: Owned by an older couple, daily driven infrequently by the wife. It was taken in any time there was even a hint of something wrong. Have all the service records.. no real engine trouble. Just glow plugs and the occasional GPR. Oil always changed on time. Most engine work it ever had was a set of new HPOP lines a couple months back.
Things I've done/ checked:
Fixed a small leak on the pass head fuel line
Fixed a small leak from the back plug on the HPOP. New CPS (International dark grey)
New fuel filter
New air filter
New ICP sensor (there was oil in the connector, probably need a new connector... Could this cause my issue?)
Disconnected EBPV, made sure it was wide open
Disconnected the Wastegate line, made sure the wastegate was closed Pressurized all IC plumbing from the turbo on to 20psi. No boost leaks. Checked MAP hose, clean and leak free.
Checked turbo shaft play. Has zero, spins freely.
Oil is clean and at the correct level. Rebuilt and cleaned the IPR, ohmed out the electromagnet as well. Cleaned EBP sensor, but found a gigantic hole in the tube. Pulled the tube and plugged the hole at the manifold, new tube arrives tomorrow. Left sensor plugged in, reading ambient pressure. (I know a plugged/bad EBP sensor will cause a defuels condition, but to what extent, I do not know. I can't image it defueling to this level though... )
Hooked up a fuel pressure gauge to the bowl, can't get it to drop below 60 psi, even at WOT.
Put it on a solus edge and buzzed the injectors, they sound okay.
IPR duty cycle is in spec cranking and at idle, as well as revving.
HPOP puts out 800psi at idle, spikes to above 2000 when I rev it.
MAP appears to read okay. Didn't pay attention to the EBP value, or drive the truck while I was hooked up... Should have. Hindsight is 20/20...
Perdels are good except for cyls 3 and 8, which I've read is a CPS issue?
No codes.
Zero smoke, just sounds anemic. Just plain won't accelerate even up a slight grade in OD right in the power band. I can put my foot to the floor, and it'll just get real noisy and go nowhere. Does anyone have any ideas? The only thing left is the injectors or the IDM if the EBP sensor/tube doesn't fix it. I'll double check the IPR duty cycle on a scanner while driving as well.
On another note, I can't get the truck to enter programming mode for another key fob. Tried all the combinations of key cycles, door open, door closed, wipers on, etc, etc. Any ideas here?
History of the truck: Owned by an older couple, daily driven infrequently by the wife. It was taken in any time there was even a hint of something wrong. Have all the service records.. no real engine trouble. Just glow plugs and the occasional GPR. Oil always changed on time. Most engine work it ever had was a set of new HPOP lines a couple months back.
Things I've done/ checked:
Fixed a small leak on the pass head fuel line
Fixed a small leak from the back plug on the HPOP. New CPS (International dark grey)
New fuel filter
New air filter
New ICP sensor (there was oil in the connector, probably need a new connector... Could this cause my issue?)
Disconnected EBPV, made sure it was wide open
Disconnected the Wastegate line, made sure the wastegate was closed Pressurized all IC plumbing from the turbo on to 20psi. No boost leaks. Checked MAP hose, clean and leak free.
Checked turbo shaft play. Has zero, spins freely.
Oil is clean and at the correct level. Rebuilt and cleaned the IPR, ohmed out the electromagnet as well. Cleaned EBP sensor, but found a gigantic hole in the tube. Pulled the tube and plugged the hole at the manifold, new tube arrives tomorrow. Left sensor plugged in, reading ambient pressure. (I know a plugged/bad EBP sensor will cause a defuels condition, but to what extent, I do not know. I can't image it defueling to this level though... )
Hooked up a fuel pressure gauge to the bowl, can't get it to drop below 60 psi, even at WOT.
Put it on a solus edge and buzzed the injectors, they sound okay.
IPR duty cycle is in spec cranking and at idle, as well as revving.
HPOP puts out 800psi at idle, spikes to above 2000 when I rev it.
MAP appears to read okay. Didn't pay attention to the EBP value, or drive the truck while I was hooked up... Should have. Hindsight is 20/20...
Perdels are good except for cyls 3 and 8, which I've read is a CPS issue?
No codes.
Zero smoke, just sounds anemic. Just plain won't accelerate even up a slight grade in OD right in the power band. I can put my foot to the floor, and it'll just get real noisy and go nowhere. Does anyone have any ideas? The only thing left is the injectors or the IDM if the EBP sensor/tube doesn't fix it. I'll double check the IPR duty cycle on a scanner while driving as well.
On another note, I can't get the truck to enter programming mode for another key fob. Tried all the combinations of key cycles, door open, door closed, wipers on, etc, etc. Any ideas here?
Hotshot
Joined: Dec 2006
Posts: 14,069
Likes: 17
From: Melbourne, Ky
If your truck is an early 99 model, then yeah, it may well be a gutless wonder. Mine was until I put a mild tune in it. It also got reman stock injectors at about 250,000 miles. Looking at everything you've done, I'd say you need to fix the EBPS tube and then see what you have.
Thread
Thread Starter
Forum
Replies
Last Post
HLS30
1999 - 2003 7.3L Power Stroke Diesel
19
Apr 25, 2016 04:30 PM
TKegs763
1999 - 2003 7.3L Power Stroke Diesel
6
Aug 28, 2013 06:32 AM
