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01 7.3 dies under acceleration

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35K views 146 replies 10 participants last post by  Gerald Small  
#1 ·
I have a 01 excursion 7.3, I just bought the thing a week ago and love it so far tons of room for the family and I can still pull what I need to. Tonight on the way home I pull up to a stop sign and then proceeded to make a left on to a major highway and as soon as I tap the accelerator it dies. I threw it in nutral and cranked it right back up and was able to get it in drive and gain enough momentum to coast to the other side of the Rd. So we opted to take the back rds home. all the way home I keep doing this and at times it would just catch hold and go. The truck sounds completely different when it trys to die out it gets quieter. The it sounds like normal when it decideds to go on. I was able to get some videos of what it's doing there dark and I'm on a dirt Rd so sorry for the shakes and I'm not sure how to post them. Lol. Ive had my CDL since I've gotten out of high school but this is the first diesel vehicle that is my daily grocery getter.
 
#2 ·
Ok so I've changed the cam position sensor and the fuel filter. Problem cont. So I bought a scanner because the problem got so bad I couldn't drive to a shop. I've scanned it and these are the confirmed codes....
P0678 cyl 1-8 glow plugs circuit
P1211 injector control pressure higher or lower than desired
P0236 turbo boost sensor A circuit range/performance
P0237 turbo boost sensor A circuit low
P1280 intergrated control panel circuit out of range low
Pending code.....
P0478 exhaust pressure control valve high input
 
#4 ·
Ok so I've changed the cam position sensor and the fuel filter. Problem cont. So I bought a scanner because the problem got so bad I couldn't drive to a shop. I've scanned it and these are the confirmed codes....
P0678 cyl 1-8 glow plugs circuit
P1211 injector control pressure higher or lower than desired
P0236 turbo boost sensor A circuit range/performance
P0237 turbo boost sensor A circuit low
P1280 intergrated control panel circuit out of range low
Pending code.....
P0478 exhaust pressure control valve high input
These are both related to the ICP (Injection Control Pressure). Sounds like your sensor may be bad. Unplug the ICP and check for oil in the connector. If oil is present I would replaced the ICP and wiring pigtail.

If your scanner is capable of live data, I'd be curious to see what the ICP and IPR duty cycle % are doing.
 
#11 ·
You're missing the tin nut that holds the solenoid in place. If that tin nut backs off it can cause the solenoid to move out of place and send faulty readings of the valve position to the PCM, so the PCM is confused based on the reading received and doesn't know to close the valve further to build the required oil pressure.
 
#13 ·
Ok so I got the nut back on drove her down the Rd and it's running like crap. It hasn't shut down on me like before but it stumbles pretty bad. Come home I scanned it again and I'm getting the glow plug code p0671-p0678 and the P0236 turbo boost sensor A circuit range/performance. Any ideas now? Thanks for all yalla help so far.
 
#17 ·
.3 hg? Or psi? Actually it doesn't matter. Either is way off. Check the reference and ground. If those are good check the signal at the pcm itself.

May be easier for ya to switch the scanner to read the voltage and then disconnect the map. Then jump the reference to the signal wire and go read the scanner again. If the voltage is pegged at 5v, replace the map.
 
#18 ·
Just unplug the map and see if it runs any better.
 
#21 ·
This is what I've found on my 2001. The Engine Sensors are really sensitive to different oils that are out there. I've found with mine it will not run with Cen-Pe-Ceo 15-40. I changed the oil back to Rotella 15/40 and my problems went away. The different brand oils have an Issue with foaming which causes air pockets so the sensors can't detect oil pressure making the Engine shut down or try to shut down. My neighbor has a Fleet of 7/3 and loves them. He runs Chevron Ursa 15/40 with no issues. Anyway hope this helps Good Luck
 
#23 ·
Well that's you're problem. The middle wire is usually the signal on most sensors. But any of the three would cause this.

That would certainly explain the strange map readings. They're not real, they're inferred by the pcm. It has to guess because it's not getting a voltage reading.

Find out where it broke and hook it back up.
 
#28 ·
Cut it out. It's meant to be a electrical boost fooler.