This truck no longer requires a smog certificate in the state of WA, I want to take off as much of the smog equipment as possible, has anyone out there done this? if so could you tell me the components that you removed?
Chuck-
Welcome!
while you may no longer need to get the truck inspection, technically it should still have all the components to be legal for on road use, not that most of us haven't taken those components off in the past. if your smog equipment is properly functioning, then it won't really hurt your fuel economy that much, and only sucks a little power. if you do decide to go through it, you'll probably decide to remove the AIR pump, and the EGR, and perhaps convert the PCV to a breather.
Try to learn how to utilize the search function on the forum and you'll find in depth instructions on how to remove these parts.
__________________
If it ain't broke, you ain't worked it hard enough...
The search function will reveal a lot of information about this particular subject, especially since it's asked about once a week.
If the smog equipment works (which I'm supposing it is, since you were able to until recently pass emissions tests), leave it on. Your engine will work better with it, especially on an '84. That era had a computer controlled carb which, without all of the smog equipment working, will run like absolute garbage.
If you convert to non-smog, you'll need a different carburetor, distributor, ignition module, and will need to re-tune it all for non-smog running. Then, if you get it all running right, you'll probably gain 3 horsepower, and maybe 0.2mpg. The 4.9 wasn't bogged down by emissions equipment like some of the V8s were.
__________________
4bbl Holley 390 w/ Offenhauser DP intake. 4 speed Manual w/OD. K&N air filter, EFI manifolds, 2.5" exhaust.
3.00 rear end and 2000 RPMs @ 80mph!
Being the devils advocate here but he dont need much of anything new.
The carb will work.
The distributor will work.
Though if everything operates good and she does what you want I would leave it.
A different carb makes the process easier but the exsisting EEC-III carb can be used.
How is removing the emissions equipment on a feedback carb setup going to allow it to still function properly? In the dozens of discussions on this topic I've read, this is the first I've heard this.
__________________
4bbl Holley 390 w/ Offenhauser DP intake. 4 speed Manual w/OD. K&N air filter, EFI manifolds, 2.5" exhaust.
3.00 rear end and 2000 RPMs @ 80mph!
I have seen feedback garbs where the adjustment screws were simply covered by servos and the like. You remove them. Heck, If the guy wants a YFA that can be tuned I have one I rebuilt a year ago and the kid never got it. $20 should cover shipping and make me a buck or two.
Hrm...that'd be interesting if you could pull the servos off and just have the adjustment screws underneath. Never looked at one closely enough. However, I think you'd still need the distributor and ignition module, since they're run off the computer, which is looking at the servos on the carb for input.
__________________
4bbl Holley 390 w/ Offenhauser DP intake. 4 speed Manual w/OD. K&N air filter, EFI manifolds, 2.5" exhaust.
3.00 rear end and 2000 RPMs @ 80mph!
The brain box for the EEC-III was the basic duraspark brainbox. Leave it sit.
If I remember right EEC-III, (hearafter refered to as "3".) Only had about 4 sensors.
Coolant temp, O2, BAP, and AIT.
Fairly basic system. I worked on an 84 ranger pkup that had the "3" system still intact. I could have removed one of the actuators on the carb but you had to tune with a channel lock. I ended up disconecting everything and riggine the choke to work as the original system was so fudged up that it was at 100% choke all year round at all engine temps.
I told the guy we could rebuild the system and he laughed at me when I said the price. The truck aint got but 3 out of 5 gears so I will run her till she dies. I just made her work.
"3" was a good system for its era. When it worked properly it did give you good milage and reduced emissions. Ford ruined the idea with that damed VV carb for their larger engines.
Thanks everyone, the truck definitely isn't broken, taking the smog equipment off sounds like more work and possible headaches than it's worth in HP savings.
Chuck
Thanks everyone, the truck definitely isn't broken, taking the smog equipment off sounds like more work and possible headaches than it's worth in HP savings.
Chuck
I would still put a timing light on it to see if it still has computer controlled IGN advance. Mine did not and I could not tell because it still ran fine. My truck ran in base timing only without any advance, or about 10 Deg BTDC.
__________________
1986 F150 XLT Lariat 4x4 300 C6, 9 inch 3:50, sway bars, DS2 w/ GM 4 pin and no computer; 90,000 miles, 2nd owner
My 1983 Bronco is missing the vacuum diagram and I have looked everywhere for one including Haynes manuals. Does anyone have one that they could send me?
if your going to remove the emissions equipment, its not worth it keeping the vehicle stock with a tired 1 barrel on it. Now if you remove the emissions and do a clifford or offy intake with a 4brl carb on top now were talkin about wakin up that ol beast. The 300 6 has so much low end torque and actually has alot more horsepower than you would expect but you dont noticed that because there smogged down soooooo bad. the motor is bein held back by emissions. unleash the beast with a intake and carb setup. you wont reqret it when its all done
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.
