What is this on top of the vavle cover to a 79 302? What is it used for smog or?

 

It appears to be D8AZ12A265A .. EGR (Exhaust Gas Recirculation) Ignition Timing Vacuum Switch, but the only 1979 302 it's listed for are Ford Fairmont's/Mercury Zephyr's.

It not illustrated or listed in the 1973/79 truck parts catalog for anything. Can you post a pic of that valve cover decal?

 

So I can do away with this? The motor has a duraspark set-up.

 

IMO, no, because the EGR system will not work properly. Since this part was not used on any 1979 w/a 302 (except Fairmont/Zephrs), it's possible the engine has been swapped.

DuraSpark Electronic Ignition introduced 1974, but not all 1974's (or 1975's) have it.

All 1976/79's do have it.

 

The motor is from a LTD. I know because I was the one that pulled it. Where is the EGR located? If it was the plate under the carb I have already taken it off and swapped it out For a normal carb spacer/plate.

 

Engines that have an EGR system are timed and tuned to run with a different combustion chemistry (jet size, distributor curve, etc). Simply removing the EGR valve can cause driveability issues if you don't compensate for it. Pinging under light acceleration is a common symptom of a missing or stuck EGR valve.

The EGR valve is located on the back of the spacer plate between the intake manifold and the carburetor.

 

What year LTD? This part is listed for 1979 LTD's (two different types, one is CA only), but only with a 351W.

Dunno about 1980 and/or later as my catalogs are on microfiche. The microfiche viewer's bulb just blew out. I don't have a spare, so I gotta go to Staples to get one.

The same bulb is used for projection TV's.

 

I thought that was the EGR it's gone been gone. We took that off when we rebuilt the carb. I just used a plain old carb plate for my 63 merc to replace it. We are the really slow process of getting rid of any and all smog related items. I'm pulling the 302 out of my 63 merc for the heads got a 289 four barrel intake that is getting taken to a machine shop to be cleaned. Valve covers are being replaced so I was trying find out if this thing can go or what it is.

I was from a 79 Ltd with the 302. I have never seen anything like this before the is why I posted it.

 

Are you sure the '79 LTD engine is a 302? According to the '73/79 Ford passenger car parts catalog, only 1979 LTD's with 351W's had that switch.

302/351W looks pretty much the same. Besides the LTD in 1979, there was also the LTD II, Ford's IDIOTIC replacement name for the Torino.

People back then confused one with another (it was a FIASCO!) as the LTD II emblem was only applied on the decklid and the II portion was hard to make out.

1979 LTD II's also had this switch, 351W only.

 

I'm positive it is from a LTD and not a LTD2. I'm positive it is a 302 also. The Valve cover says it is a 302(the same one where the part in question is) and the Car is a LTd I can get you a VIn if you would like. I wish it was a 351w. I can't belive I found something that confuses you.

YOu said it was on the 80's ltd right. Is it possible this is a LATE 79? I will get the vin and warntiy plate info from the car tomorrow if yo will decode it for me. I can't find anywahere online to get the decoding info for the car to find out what rear end it has.

 

You aren't confusing me, you're confusing Ford Motor Co.

I'm just the messenger, I read then type the info from the parts catalogs.

If the VIN is 11 digits: 1979 / If 17 digits: 1980 thru today.

The switch could be from an 80's LTD 302, but I can't look the number up to verify.

My microfiche viewer is history, it's more than just a burned out bulb. Since everything I have is on microfiche 1980 and later, I'm SOL till I find another.

 

Not to hijack...But I may have a complete working microfiche reader for sale Bill...if you are interested....Not sure what the magnification is tho.

 

YOu aint hijacking Any help we can get Nummers to get him back helping 1980+ people isn't hijacking.

Here is the info from the warranty tag and the valve cover in which the part in question is a fixed to.

Built 11/78
Body- 54H
VR- HV
MLDG- 64F
INT. TRIM- EY
A/C- A
R- 4
S NOTHING UNDER THIS
AX- G

DSO
TR- W99DD

VINA63F139355

On the drivers valve cover.

Engine family 5.0 AV(2X124) EGR/AIR/CATALYST

Engine Displacement 5.0L(302CID) TRANS AUTO

U.S.E.P.A. Regulations 1979

D9AE-9C485-EA

AEP

EVAPORATIVE FAMILY IS K

That is word for word what the valve cover says. I'm 99.9% positive that the motor is orginal and has never been pulled till I pulled it. It couldn't have been pulled off of another car and added to this one unless the pulled the whole valve cover as the mounting brackets are a fixed to the cover.