Join Date: Jul 2016
Location: Asheboro NC
Bronco Info: 1992 Bronco XLT NITE 5.0
Backfiring, shaking idle, and more..
Having issues with my truck. I ran codes but nothing came up too drastic in KOER test (172,225,632) and with KOEO i got (334, 327,and 539) Im pretty sure some of those codes may come from my badly cracked exhaust manifold, but those codes are not necessarily the issue, because i've had those codes since I've owned the truck, but it has still ran fine, until yesterday.
The idle seems to be shaking alot more now, the rpm needle shakes alot at idle now also. It hunts for a second or two (always did this) but once it settles down i can feel the truck shake and see the rpm needle shake as well.
While driving at slow speeds nothing is noticeable. Around 35-40 mph after a downshift into third I believe, the whole truck shakes and i can hear a faint backfiring or popping noise. At a certain speed this goes away (above 55 maybe), but if i let off the acceleration a bit and pick back up, it starts the shaking and popping cycle starts again.
I was thinking that I may could be the TPS sensor, but im not too sure. Im wondering if these symptoms sound like that would be the problem.
1992 Ford Bronco XLT Nite
Lifted on 36's
Tonneau soft top.
& whatever the previous 12 owners felt like tinkering with.