2000 Ford Ranger Q&A
2000 Ford Ranger Question: Engine shudders
When i come to almost a complete stop the engine shudders and sound like it wants to stall but smooths out. This doesn't happen but only once in a while. I'm not getting any codes. I did just fix a code of P0171, had a hole in the EGR tube. My engine still wants to shudder sometimes. I have replaced MAF sensor, PCV and plumbing, fuel filter,plugs and wires. Should i replace the Idle Air control? - wheelchairdude49
Is this an automatic or manual transmission? An automatic transmission vehicle with this symptom could be caused by a torque converter that is not releasing, or a transmission that is not downshifting as needed. As you get to a stop, you have been coasting a bit, and very little fuel is required to run. So it is likely otherwise an air flow issue as you suspected, like a vacuum leak or unmetered air leak (check air box and hose), or the idle air control valve you mentioned. Pay attention to the first thought though if it's an automatic. - DaveJHM
if the iac motor is the issue, try taking the wires off while the engine is running. the motor should idle very slowly about 500 rpm. if it stalls, then have the throttle body cleaned out, base idle adjusted to spec and yes, i would replace the iac valve. Roy - mastertech6371
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While driving down the highway at around 55mph the check engine light popped on and I felt engine shudder. After that it would bog down when trying to accelerate. M...
it does this only after i drive it for a while, then shut it off and let it sit for a few minutes. when i turn the key, it starts, the shakes and shudders, then stalls. the only way i can fix this ...