Running Rough after TC Replacement
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Running Rough after TC Replacement
1997 F150
4.6 Triton, 2wd
A couple weeks ago I dropped the transmission out of my truck for the first time in order to replace the torque converter that has been giving me trouble for awhile. Put it all back together and started it.
It started fine but the engine immediately was running extremely rough and loud, almost like it wasn't firing correctly. It then began to smell of gas and really strong exhaust, almost like you were at a raceway. My tuner showed me that the coolant temperature went from completely cool to 170 from just idling and giving very little gas. Also a white smoke began to come from the engine compartment and that's when I shut her down.
I'm at a loss right now because the truck goes into gear fine and the exhaust is on tight. I'm hoping someone could shed some light as to why this is happening, thanks in advance.
4.6 Triton, 2wd
A couple weeks ago I dropped the transmission out of my truck for the first time in order to replace the torque converter that has been giving me trouble for awhile. Put it all back together and started it.
It started fine but the engine immediately was running extremely rough and loud, almost like it wasn't firing correctly. It then began to smell of gas and really strong exhaust, almost like you were at a raceway. My tuner showed me that the coolant temperature went from completely cool to 170 from just idling and giving very little gas. Also a white smoke began to come from the engine compartment and that's when I shut her down.
I'm at a loss right now because the truck goes into gear fine and the exhaust is on tight. I'm hoping someone could shed some light as to why this is happening, thanks in advance.
Hotshot
Joined: Jul 2005
Posts: 11,931
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im wondering if the converter was slid on all the way, or transmission pilot correctly onto the motor ? Did you have to use the bellhousing bolts to pull the transmission into position ? White smoke could be dragging / friction... overheating motor could be dragging / load on motor... vibration could be dragging / tight parts between motor and trans... Im thinking the transmission needs to be pulled back several inches and inspecting of the front area / converter / flywheel / bolts ... etc.
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Hmmm.. I'm nearly positive the converter was all the way seated as the pilot was sitting deeper then the edges of the bell housing.. converter bolts are also torqued to specification and the bolts look like they are pulled thru the flex plate as far as when I took them off. Dowel pins are lined up accordingly and overall it looks like seated properly.
Would it be possible that something such as a vacuum line came undone when the engine was changing angles?
Maybe something in the exhaust? I was told that an unresponsive O2 sensor would not cause this, as a banged the upstream ones up pretty good on the heat shield sliding the pipes back and forth.
Also have been told that maybe some debris is causing a clog in the oil cooler lines and the ATF is not flowing into the radiator? I would assume this would just cause the trans to overheat, not the engine. The trans temp SEEMED fine from the limited time it was in gear.
Started it 6 or 7 times and it hasn't shot me a trouble code yet, kinda wishing it would so I would at least know where to start
Would it be possible that something such as a vacuum line came undone when the engine was changing angles?
Maybe something in the exhaust? I was told that an unresponsive O2 sensor would not cause this, as a banged the upstream ones up pretty good on the heat shield sliding the pipes back and forth.
Also have been told that maybe some debris is causing a clog in the oil cooler lines and the ATF is not flowing into the radiator? I would assume this would just cause the trans to overheat, not the engine. The trans temp SEEMED fine from the limited time it was in gear.
Started it 6 or 7 times and it hasn't shot me a trouble code yet, kinda wishing it would so I would at least know where to start
Hotshot
Joined: Jul 2005
Posts: 11,931
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o2 sensor codes come on pretty quick. Lot of trucks will throw that code and still running good. If it runs BAD and its due to 02, I would think you would have got one of the codes, if not 2-3 codes. If its "tight" or "binding" on the converter / flex plate area, you probably will never see any code........ Hope its something more simple, but I don't see that....... If you have a big vacuum problem, the heater will be stuck on defrost and no air flow to floor or vents.. something to check.
Cargo Master
Joined: Dec 2004
Posts: 2,232
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From: NE Texas
I would check things that had to be removed or disconnected during the operation of removing and replacing the transmission. The first thing that comes to mind is the ground strap, but check all connections electrical and otherwise.
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