Sputtering, Jerking, While Accelerating and Shifting
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Joined: Apr 2017
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From: Mobile, AL.
Sputtering, Jerking, While Accelerating and Shifting
I have a '95 F-150 4.9 300 I6. When I start accelerating during take off, my truck jerks and sputters. It's a 5 speed manual and sputters in all gears. I've replaced a bunch of the most common things already from previous issues with this truck. Does anyone have any ideas as to what this could be? The "Check Engine" light is not on. Is there a way to test the pick up coil? I will also add that while driving, it has surges where it will clear for a minute, but gets back to sputtering. It is definitely getting worse every time I drive it. It's hard to get it to go past 60mph. Any help appreciated.
Elder User
Joined: Sep 2012
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Code 122 is TPS voltage below 0.6 https://www.fordf150.net/howto/eecivcodes.php
Check voltage. Here's a thread w/ info: https://www.ford-trucks.com/forums/1...str-6-a-2.html
Check voltage. Here's a thread w/ info: https://www.ford-trucks.com/forums/1...str-6-a-2.html
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Joined: Dec 2003
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Was there a final fix to this problem? I'm having what sounds like the same problem. Initially I found the PCV grommet was shot and the PCV kept popping out. But it still sputtered after fixing that. It's not like one cylinder dropping out either, it's like the whole engine instantly slows down, a major instant drop in power, mainly at idle and just light acceleration. I changed all plugs and COP's because of the 150K miles on them. I also cleaned the MAF sensor and new air filter. The fuel pump is new, about 1 year old. Side note**-- I have reprogrammed the computer with an SCT programmer, and the CEL is disabled for the O2 sensors since the cat converter was removed by the last owner, and with the tuneup I have in it the guys told me they disabled the O2 portion of the check engine light. Just wondering if a bad O2 sensor could be causing a very lean condition or if the computer would detect a lean fuel long term trim and automatically compensate.
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I just looked at the O2 sensor graphs while it was idling and Bank 2x1 sensor was running very slow, choppy, not reaching full peaks ever. I unplugged it to try and trigger the fail safe mode and the engine is still randomly sputtering. New O2 sensors going in today but problem still not solved. I did notice the vacuum is around 5-6 in/mg and during each "sputter" the vac jumps to 20 and then to 1, then back to 5 again.
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Just a thought
I have a 92 f150 that was having those problems and more. Turned out it was my computer. Wasn't sending codes, runs rough, didn't shift well(automatic transmission), would stall while idling, etc. Replaced the computer and all the problems went away. I found this out after replacing a lot of consumables.
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