'70 EEC system..???

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Mar 17, 2007 | 03:42 PM

jim2527

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From: Tampa, Florida

'70 EEC system..???

My '70 base engine has no EEC/vapor lines running down the drivers side frame rail. There is no canister in the drivers fender.

Looking in Paragons website it apperas not all '70 cars had the EEC/vapor system. can anyone shed some light on this.

Anyone have schematic of the PCV valve and tubing for my car?

Paragon part # 3572K

Please do me the favor and tell me my car didnt come with it....!!!!

'70, 4sp., base 350, A/C

Thanks,
Jim

Mar 17, 2007 | 03:54 PM

7T1vette

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From: Crossville TN

I believe the '70 had about the same emissions equipment that is on my '71. PCV valve and vapor return line/cannister are parts of that. Simply put, there is a vapor recovery line from the cannister to a "T" fitting going to the PCV valve. The PCV fits in a hole on the left side valve cover. The outlet side of the "T" fitting goes to a vacuum connector at the base of your carb. (That's were the oil & gas vapors get sucked into the intake manifold.)

Mar 17, 2007 | 07:00 PM

jim2527

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I have a PCV valve but nothing else. In my quest to rid the garage of fumes I discovered there's nothing pertaining to an EEC/cannister system on my car. That in turn lead me to the Paragon site looking for parts. I noticed they list some '70 models that may not have an EEC with the cannister. I trying to figure out if my car is one of them or if someone hacked it.

Jim

Mar 17, 2007 | 09:30 PM

7T1vette

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From: Crossville TN

I don't know when the vapor cannister went into effect in '70. I do know that there was a strike in Sept 69-early 70, so maybe it was a "pre-strike" and "Post-strike" change issue. Keep researching...I'm sure someone on the Forum can clear this up.

Mar 17, 2007 | 09:51 PM

Paul Borowski

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...I maybe wrong on this, but the tune-up label(if original)behind your master cylinder/brake booster should say "EEC" if your car had/has it. I know the 1973 and up labels do. They'll list A.I.R. for the smog pump, EGR, EFE, OOC(catalytic converter)for the later C3s.

Mar 17, 2007 | 10:39 PM

early shark

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From: Nevada City California

The 1970 Corvette models destined for California had the NA9 additional emissions. I believe this included the Evaporative Emissions Control (EEC) that you are talking about. 49 state 1970 models didn't need it.

Mar 18, 2007 | 02:13 AM

Z-man

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From: Foxfield CO 1970 Convertible

Quote:

Originally Posted by early shark

Unless the car was sold in CA, the extra stuff wasn't on them. We used to have a term - "49 State" cars....

Mar 18, 2007 | 08:30 AM

jim2527

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From: Tampa, Florida

Thanks for the help. I'm liking this '70 more and more as I go. High compression, no A.I.R. system, no EEC and no expansion tank. Nice and clean under the hood.

I'm still waiting for my reference books. Does anyone have a PCV scematic for my car?

Jim