70 Emissions spark control thingy?

[Mike F.]

Sorry, but I do not know the proper term for this thingy is???

I currently have a vacuum line that goes from the distributor to the front of the carb. (fuel line needs replaced, I have one).

With the new thingy in place where should the forward vacuum hose go? Where the current distributor vacuum hose is installed or where the red cap is?
What happens with the "not used" vacuum port?

Edit; The carb is #7040507 3529. My car was built in May. If I understand correctly the carb was built in Dec. 69. The TIM&JG indicate 7040507 is a 350(L46), 4spd & ECS, which I have. Would this be an acceptable time frame for the carb?

The front of the carb has a vacuum nipple on both the driver and passenger side. If the ECS vacuum line attaches to the passenger side, what should be done with the driver side vacuum nipple?

Thanks,
Mike

[Joe L.]

Re: 70 Emissions spark control thingy?

Sorry, but I do not know the proper term for this thingy is???

I currently have a vacuum line that goes from the distributor to the front of the carb. (fuel line needs replaced, I have one).

With the new thingy in place where should the forward vacuum hose go? Where the current distributor vacuum hose is installed or where the red cap is?
What happens with the "not used" vacuum port?

Thanks,
Mike

Mike------



The "thingy" is a SOLENOID. The vacuum port used should be the one on the passenger side of the carburetor. I don't recall there being a nipple on the driver side of the 1970 carb but maybe I've forgotten. Is this an original part numbered carb?

[Richard M.]

Re: 70 Emissions spark control thingy?

Mike, just a observation...... the distributor.

It appears that it is not clocked correctly, being rotated a few extra teeth clockwise.

When typically installed, the distributor cap screws should be perpendicular to the crankshaft, with the #1 wire facing front. It looks like your #1 wire faces front(your ref #2 tape marker), but the vacuum advance can should normally be pointing at a 45 degree angle between the carb and the rear of the block.

Rich

[Terry M.]

Re: 70 Emissions spark control thingy?

Sorry, but I do not know the proper term for this thingy is???

I currently have a vacuum line that goes from the distributor to the front of the carb. (fuel line needs replaced, I have one).

With the new thingy in place where should the forward vacuum hose go? Where the current distributor vacuum hose is installed or where the red cap is?
What happens with the "not used" vacuum port?

Thanks,
Mike

Mike,

Get yourself a 1970 AIM (Assembly Instruction Manual). There will be a drawing of the vacuum hoses for the TCS (Transmission Controlled Spark) solenoid in there. One of those ports has a hose that goes to a pipe on the top of the carburetor air horn (IF you have the correct carburetor). It is a vent for the TCS vacuum system.

[Stuart F.]

Re: 70 Emissions spark control thingy?

If you do use the solenoid, make sure you have it wired so it can function properly (I don't see the connector nearby). You can defeat it and still have it look stock using a manual override switch and some internal carburetor port work, but that's a whole different story.

Stu Fox

[Patrick H.]

Re: 70 Emissions spark control thingy?

Mike, just a observation...... the distributor.

It appears that it is not clocked correctly, being rotated a few extra teeth clockwise.

When typically installed, the distributor cap screws should be perpendicular to the crankshaft, with the #1 wire facing front. It looks like your #1 wire faces front(your ref #2 tape marker), but the vacuum advance can should normally be pointing at a 45 degree angle between the carb and the rear of the block.

Rich

Rich,

You must be used to midyears. His distributor clocking is correct for an early C3.

Patrick

[Richard M.]

Re: 70 Emissions spark control thingy?

Rich,

You must be used to midyears. His distributor clocking is correct for an early C3.

Patrick

Yep, C1's & C2's.......It looked really weird to me. Sorry Mike.
Rich

[Edward J.]

Re: 70 Emissions spark control thingy?

Rich,

You must be used to midyears. His distributor clocking is correct for an early C3.

Patrick

Patrick, I think he maybe off one tooth on the dist. clock position, It would seem that the tach cable would really be kinked at that position,and the dist. window would face more to the front.

I think that Doc. rebuild has a vaccum dia. in his parts book if you have it.

[Patrick H.]

Re: 70 Emissions spark control thingy?

Patrick, I think he maybe off one tooth on the dist. clock position, It would seem that the tach cable would really be kinked at that position,and the dist. window would face more to the front.

I think that Doc. rebuild has a vaccum dia. in his parts book if you have it.

Looks like the two I have:

[Edward J.]

Re: 70 Emissions spark control thingy?

Looks like the two I have:

Pat, his window is just behind the Dist clamp, yours is in front of Dist clamp. maybe the timing is retarded a bit.

[Patrick H.]

Re: 70 Emissions spark control thingy?

Pat, his window is just behind the Dist clamp, yours is in front of Dist clamp. maybe the timing is retarded a bit.

"If" his distributor is original to his engine, it's easy enough to line up the staked lines on the distributor + intake and see if they match. That's what I do.

Patrick