• Welcome Visitor! Please take a few seconds and Register for our forum. Even if you don't want to post, you can still 'Like' and react to posts.

89 2.9L kicks & bucks at cruise


patrick260z

New Member
Joined
Nov 7, 2010
Messages
2
Reaction score
0
Points
0
Transmission
Automatic
I've got a 89 2.9L V6 Ranger. At cold seems to do city drive ok, but misses under acceleration to highway speed (heavy throttle). Once up to temperature, shutters and bucks while cruising. If I leave my foot in the same position the truck goes from 70 down to 60 before coming to life again, and accelerating to abt 65 before starting to spurt and sputter. If at cruise and the truck starts sputtering and I give it more gas, it will all of a sudden roar to life and accelerate. In fact, if I drive the motor above 4k, no shuttering or anything. Once warmed up and I drive around the city, the vehicle is always bucking... unless I keep it in too high a gear and grunt it around. So it seems like the vehicle, when warm, runs smooth only under load.
I have replaced:
fuel filter
plugs and wires
fuel regulator
MAP sensor
air filter
and I have done a couple of seafoams too.

Does anyone have any idea whats goin' on??
Thanks
 


Gary101386

New Member
Joined
Oct 26, 2011
Messages
319
Reaction score
1
Points
0
Location
Oswego IL
Vehicle Year
1989
Make / Model
Ford
Engine Size
2.9
Transmission
Manual
clean your IAC Idle Air Control. had the saem issue with my mustang and it fixed that.
 

Sponsored Ad


Sponsored Ad

Members online

Member & Vendor Upgrades

For a small yearly donation, you can support this forum and receive a 'Supporting Member' banner, or become a 'Supporting Vendor' and promote your products here. Click the banner to find out how.

Truck of The Month


Kirby N.
March Truck of The Month

Recently Featured

Want to see your truck here? Share your photos and details in the forum.

Follow TRS On Instagram

TRS Events

25th Anniversary Sponsors

Check Out The TRS Store


Sponsored Ad


Sponsored Ad

Sponsored Ad


Amazon Deals

Top