Tired Straight 6

Asked by Sep 20, 2010 at 02:38 AM about the 1996 Ford F-150

Question type: Maintenance & Repair

I have a 96 F150 straight 6 4.9 liter with manual trans. I like the looks, size and ride of the truck. But the engine seems tired at 120,000 K and gas milage has plummeted. Eddie Baur with clean body and interior. Can I put a newer 6 clyinder engine in it? A rebuild. What's the best way to get life back in the drive train - and will I have to replace the trany also (shifts fine but heard new engine with old trany will cause problems). Sorry, trying to decide if I keep this one or send it down the road. If I can get it running great again, I'd likely keep it.

6 Answers

25

Try doing or getting a tune up done (new spark plugs and wires). Replace the fuel filter, air filter (if it has been a while since it was replace). Also if it needs it, change the oil. I would also run a bottle of Lucas fuel treatment through a tank of gas to help clean the injectors. This is all regular maintance stuff that should keep the truck running right. One of my friends has a 95 with the same set up with orginal motor with over 170k and his runs great.

1 of 1 people found this helpful.
5

Run some seafoam in the tank a whole bottle and then put half a bottle in the oil or as the bottle says depending on the amount the straight six holds and they vary in years on how much they hold. A new motor with old tranny is not a bad thing but i recommend u check the gear lube level in the tranny or change it if you are goin to put a new motor in, this will help the gears in the tranny hold up to the torque of a newer straight six but and this parts big check your gear ratio i have scattered a tranny before cause a buddy told me if i hooked them up it'd be fine but the newer six had more than stock torque which i was not told so i found a warner T-18 4spd and boltted it up and works great but also after your first rear main seal it'll go out ever ten thousand after that.

Do the tune up,replace the fuel filter also,have the timeing checked to,it could be a little off with the milage,also change the pcv valve.DONT listen to this jake jokester,what he post is pure BS.if you are concedering a new engine,dont worrie,you wont explode the tranny,tourk and hp in a new one well be the same as when you bought the truck new,these,s are great engines and with regular service you will get at least,500,000 miles out of it.

2 of 2 people found this helpful.
1,295

Papa is right. Don't listen to jake. Hell if you want to save some time, Don't buy a new motor. Just rebuild this one. Rebore it, restroke, new valves, heads, intake, all that fun stuff. Very simple, but very time consuming too.

1 of 1 people found this helpful.

check the compression

I have a '96 Eddie Baur, Reg Cab, Long Bed and it has 129,000 miles. I'm having the same issues as well. I'm getting 10-12 MPG and it seems to slightly studder when excellerating. I changed the wires, plugs, rotor, distributor cap. I also ran a can of Sea Foam in the Fuel tanks and oil and the second can on the vacuum hose. I guess I now need to check the Cat and the 02 sensor. I also heard some guys telling me about a restricter plate that goes on the EGR Valve that helps smooth out the motor and makes it run like brand new. There must be 10-20 different ways to improve milage and performance on these. The problem is which one to go with.

Your Answer

Add photo

Related Questions

  • Tired Straight 6 6 answers

    I have a 96 F150 straight 6 4.9 liter with manual trans. I like the looks, size and ride of the truck. But the engine seems tired at 120,000 K and gas milage has plummeted. Eddie Baur with clean body ...

    1996 Ford F-150

    -

    Maintenance & Repair

  • 300 straight 6 1 answer

    Have a 1980 f150 straight 6 4 speed 1 barrel carter carb truck will run if I keep foot on gas but won't stay running if I let off getting fuel to carb need help

    1980 Ford F-150

    -

    Maintenance & Repair

  • 1996 F 150 w/ EFI (straight 6) 300 cid w/5 Speed Trans. 3 answers

    It get's poor gas mileage and when weather is 90 degrees or above you drive 10 miles or less then starts running sluggish and when you shut it off and try to start it again it runs very rough and ta...

    1996 Ford F-150 XL LB

    -

    Maintenance & Repair

  • where is the brain box on a 1987 ford F150 300 straight 6 4x4 automatic 4 answers

    where is the brain box on a 1987 ford F150 4x4 custom 300 straight 6 automatic

    1987 Ford F-150

    -

    Maintenance & Repair

  • Air Flow 88 F150 Straight 6 1 answer

    After a fire in the engine at the fuel injector, I've replaced the damage and put new seals on. I've tested the engine and fuel flows, it gets to the spark plugs fine. The spark plugs are new and gap...

    1988 Ford F-150

    -

    Maintenance & Repair

F-150

Looking for a Used F-150 in your area?

CarGurus has 180,790 nationwide F-150 listings starting at $1,500.

ZIP:

Search Ford F-150 Questions

Ford F-150 Experts

#1 OJ
OJ
Reputation 8,740
#2 dandyoun
dandyoun
Reputation 4,470
#3 tennisshoes
tennisshoes
Reputation 3,000
View All

Related Models For Sale

Used GMC Sierra 1500
782 Great Deals out of 67,910 listings starting at $1,699
Used Dodge Ram 1500
406 Great Deals out of 10,670 listings starting at $1,500
Used Toyota Tacoma
557 Great Deals out of 41,663 listings starting at $2,999
Used Ford F-250
473 listings starting at $1,295
Used Ford Mustang
729 Great Deals out of 42,731 listings starting at $1,300
Used Ford Explorer
809 Great Deals out of 62,465 listings starting at $495
Used Chevrolet Tahoe
614 Great Deals out of 35,916 listings starting at $1,000
Used Ford Ranger
182 Great Deals out of 5,533 listings starting at $1,000

Used Cars For Sale

2018 Ford F-150 For Sale
4,365 listings starting at $18,539
2017 Ford F-150 For Sale
69 Great Deals out of 108,693 listings starting at $15,407
2016 Ford F-150 For Sale
114 Great Deals out of 7,780 listings starting at $18,440
2015 Ford F-150 For Sale
250 Great Deals out of 9,649 listings starting at $14,675
2014 Ford F-150 For Sale
358 Great Deals out of 12,869 listings starting at $8,990

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.