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1998 Mercury Mountaineer 4.0L Poor Idle Quality, Surge
Posted to Ford Driveability on 12/23/2003 6 Replies

seems to have poor idle quality cold or hot and also surges and bucks when egr opens at 35-45 mph, disconect egr hose surge goes away but still poor idle, tried another used mass air flow sensor same symtoms, the only thing i see strange is the baro pid starts...

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Message Closed w/Summary

car Vehicle Data

1998 Mercury Mountaineer

VIN 4M2ZU54E9W
Engine4.0 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Surge
OccursAlways, Cold, on Accel, 35-45 Mph
Message Closed w/Summary

car Vehicle Data

1998 Mercury Mountaineer

VIN 4M2ZU54E9W
Engine4.0 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Surge
OccursAlways, Cold, on Accel, 35-45 Mph