Guest Posted March 21, 2003 Share Posted March 21, 2003 My 70 Cutlass with a 4speed has a brokentTransmission spark control switch. Should I replace it? I see them on Ebay. What does it do? Thanks Link to comment Share on other sites More sharing options...
rocketraider Posted March 21, 2003 Share Posted March 21, 2003 Personally, unless I was going for a 1000-point restoration or had to deal with emissions inspection, I'd leave it off and bypass the system totally. If you can get the switch cheap, you might want to get it just to have. But then I've seen the solenoid switches on the intake go for ludicrous money.What it does is delay vacuum advance to the distributor until the transmission is in high gear. This supposedly reduced emissions but also hurt performance compared to having full-time vacuum advance.I think we've visited the TCS on this site before, but if you're not completely sure about bypassing it or putting it back, we can walk you thru it again. Link to comment Share on other sites More sharing options...
Guest Posted March 22, 2003 Share Posted March 22, 2003 Thanks for the information. The top connection is broken off, so the unit is still in the trans. I can't find the wire and will check the schmatic someday. I will take you advice and leave it alone. There's one on Ebay starting at $20. I've seen a few of them. Thanks again. Link to comment Share on other sites More sharing options...
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