7.3 cuts off in reverse
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Senior User
Joined: May 2005
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7.3 cuts off in reverse
I have a friend trying to figure out a problem. His 7.3 recently has begun to cut off when engaged in reverse. It happen only once in Drive, but as soon as he engages reverse, the truck goes dead.
Any suggestions? Anybody had this problem?
THANKS in advance!
Any suggestions? Anybody had this problem?
THANKS in advance!
Post Fiend
Joined: Jul 2005
Posts: 14,582
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From: 21791
send a PM to member Jtharvey. he had this problem on his new BTS trans after he got it, come to find out that a factory Ford (unmodified part) was defective or not functioning, i think it was the front pump, actually.
Lead Driver
Joined: Oct 2004
Posts: 7,413
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From: Columbia, MO
Yes, Kris, it was the pump. Bad from the start, from Ford, and it was new. But, the symptoms were the similar.
On the truck, if you put it into reverse at idle, will it stay running until you give it some throttle?
On the truck, if you put it into reverse at idle, will it stay running until you give it some throttle?
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Senior User
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Originally Posted by jtharvey
Yes, Kris, it was the pump. Bad from the start, from Ford, and it was new. But, the symptoms were the similar.
On the truck, if you put it into reverse at idle, will it stay running until you give it some throttle?
On the truck, if you put it into reverse at idle, will it stay running until you give it some throttle?
Lead Driver
Joined: Oct 2004
Posts: 7,413
Likes: 1
From: Columbia, MO
Sounds more electrical than mechanical to me. If it were mechanical, it wouldn't be very sporadic. When mine died, it was consistent, and could be repeated no matter what. Didn't matter temp of the trans, temp of the engine, how long it had been running, time of day, or cycle of the moon, it would do it the same way every time. And, it only happened in reverse for me, not in drive.
I'm not ruling out the pump, but if it were the pump I would see it as being more consistent.
I'm not ruling out the pump, but if it were the pump I would see it as being more consistent.
Of the next Riffraff East
Joined: Oct 2004
Posts: 8,679
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From: Concord NC
I remembered this post from a while back, https://www.ford-trucks.com/forums/5...wing-fuse.html , I know you didn't say anything about blowing fuses but may still be your problem. When it died in drive, he didn't happen to adjust the tilt wheel did he?
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well to conclude this topic, it was a wiring harness inside the engine compartment that had a short. Great thing it was included in the 100,000 mile engine warranty for the diesel. Ford mechanic replaced the entire harness and now truck runs great. THANKS for the inputs!
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Joined: Sep 2006
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From: Lincoln, NE
Man just a couple of weeks ago I had a glut of things going haywire and the killing in reverse made me stop everything until I figured it out.
Now I have no idea if you have the same thing, but something to check:
I had a BTS tranny just put in. I had a 6.0 cooler put in with it. Everything grand. But briefly.
I got this funky shudder a couple of times. Then I got looking at the temps saying this is too high. Then the reverse killed it.
Line pressure was doing all of them, and the issue was I had a kink in the hose coming out of the cooler. No flow, no cooling. No flow, funky pressures, TC not engaging and disengaging like it should . . . for me at least fixing the kink fixed it all. You may have that or some other obstruction.
Sounds like your TC isnt disengaging when you reverse and that'll kill the engine.
Now I have no idea if you have the same thing, but something to check:
I had a BTS tranny just put in. I had a 6.0 cooler put in with it. Everything grand. But briefly.
I got this funky shudder a couple of times. Then I got looking at the temps saying this is too high. Then the reverse killed it.
Line pressure was doing all of them, and the issue was I had a kink in the hose coming out of the cooler. No flow, no cooling. No flow, funky pressures, TC not engaging and disengaging like it should . . . for me at least fixing the kink fixed it all. You may have that or some other obstruction.
Sounds like your TC isnt disengaging when you reverse and that'll kill the engine.
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Of the next Riffraff East
Joined: Oct 2004
Posts: 8,679
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From: Concord NC
Originally Posted by towandcamp
well to conclude this topic, it was a wiring harness inside the engine compartment that had a short............
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