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Bucking Missing and Backfiring


rednik

New Member
Joined
Jul 14, 2016
Messages
8
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0
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0
Location
Nanuet, NY
Vehicle Year
1997
Make / Model
Ford
Engine Size
2.3
Transmission
Manual
Hey everyone,

I have had this issure for the last 20k where between 900 and 1200 RPM the engine will miss to the point where it starts bucking and backfiring. It's driving me :tease::pissedoff: and i cant track it down to anything. No codes and I hooked up a scan tool and the fuel trims were good. I replaced a cam sensor and it ran well for 5 days then got worse lol. I have also replaced the temp sensor, IAC, timing belt, TPS, cam sensor for a second time, and cleaned the MAF.

Has anyone ever had a problem related to this?? I have a 97.

Thanks,

Nik
 


tomw

Well-Known Member
U.S. Military - Veteran
Joined
Aug 15, 2007
Messages
1,613
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Location
toenails of foothills NW of Atlanta
Vehicle Year
1985
Make / Model
ford
Engine Type
2.3 (4 Cylinder)
Engine Size
lima bean
Transmission
Manual
2WD / 4WD
2WD
My credo
vertical and above ground
It would not be difficult to check the resistance of your plug wires. With internal gaps, they can cause the engine to run poorly, as if some cylinders were shut off, and snort and buck. If you get OL in the DVOM screen, get some new ones. I do not remember the number but it was something like 1k ohm per foot of length... Look it up.
tom
 

RonD

Official TRS AI
TRS Technical Advisor
Joined
Jun 2, 2012
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Location
canada
Vehicle Year
1994
Make / Model
Ford
Transmission
Manual
Unplug EGR Valve's vacuum hose and plug the hose, then go for a drive

This will test if EGR valve is being opened too much at lower RPMs, fouling the air/fuel mix
 

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