why are there millions of vacuum lines across the intake and around the engine of my LG4? can they be removed if i switch to a non computer controlled carb set up? so far these are the parts i have gathered: edelbrock performer 600 edelbrock aluminum intake ac delco vacuum advance dist stuff i want/ still have to get: transmission wiring thingy what parts am i missing to finish off the swap? this cc q-jet set up is breaking my balls here. i would also like to get a msd ignition box, msd blaster, and msd dist in the future.

Some of them vacuum lines you will still need, there is one for your heater I think it controls the blend door or something and I am sure there is one for your transmission...those are two that I can think of right at the moment and there may be a few more you need.

There isn't any vacuum line to a TH700R-4 transmission.

Keep the intake (assuming it's a Performer intake - you weren't specific), return the rest. Unless you enjoy expense and disappointment.

The CC q-jet is a much better choice for performance, economy, and flexibility. The Performer is based on 50-year-old technology, and although it "works", these pages are filled with the frustrations caused by them. Yes, people have "issues" with the CC q-jet as well, but it's typically because of something they're overlooking, or simple refusal to understand how the system works and what you need to provide it.

There aren't "millions of vacuum lines" running across the engine. The uses are simple and logical. Could it be cleaner? Yes. Moving the purge control valve over closer to the canister would be one way. But, it really isn't that bad, and the vacuum diagram under the hood explains it all. If you go with headers (a much better return on your performance $'s), you can eliminate the EFE and its associated tubing - that's a good start on the clean-up.

I simply do not understand why anyone would take off a perfectly good system and put on something that will cost money to install, defeat useful purposes that will cost more money to restore, perform no better and will perform worse if true upgrades are made, cause damage if certain provisions aren't made, and will cost more to operate.

It makes absolutely no sense at all.

Something that should always be included with this modification is a lobotomy.

JamesC

I removed almost all my vacuum lines and still run the CCC Q-Jet and the car runs flawless. I made a plate to eliminate the EGR valve and a couple more things. I still get about 26 mpg and the carb performs great. Love to hear that 4 barrel howl.

26 mpg? how are you doing that?

It runs just fine with no codes. I have checked the computer and it is running with no problems.

Not that uncommon. I would get that on the highway when my LG4 was stock, even without functioning TCC lock-up.

I'm getting 23 MPG with my '84 T/A LG4 with a 3.23 ratio rear end and the original O2 sensor. The car still smells a little rich so I think it could do a little better with a new sensor.

I bet a LG4 in a base model car with an OD trans and 2-series ratio rear end could get pretty close to 30MPG on the highway.

My LG4 w/ 3.73's got about 19-20mpg on the highway at 75-80mph when it had the Q-jet. With the 1406 Edlebrock and no TCC its dropped to 17mpg. I'm sure 2800rpm at 75mph isn't helping me...

maybe I need to get rid of this bosch sensor and try a factory one, because I have the auto and 2.73's and I dont get that

I do have a 5-speed. The car doesn't have headers but it don't have catalytic converter and does have a 2 1/2" flowmaster muffler. I can cruise forever in that car on a tank of gas. I don't have any power robbing belts except the power steering and water pump belts.

On these older 3rd gens spark plug, wires and a basic tuneup with fuel filter, pcv valve make a difference on these cars. I change my spark plugs every 6,000 miles whether it needs them or not. I haven't put more than 16,000 miles on the car and I have changed plugs 3 times and plug wires a couple times, a couple distributor caps and rotor buttons. All that stuff makes a big difference on the carbed cars. I never change any of that stuff on my newer cars.

Yeah I am an automatic so that probally doesnt help much, but I have headers to 3in straight to flowmaster dual outlet muffler, no cat here either...i could probally could use a tune up, Im on a new ccc q-jet and fresh tune on it. Im gonna try and have the plug wires and spark plugs changed. What kind do you use?? Also what should I use for the cap and rotor, these havent been changed in a while and do a stock oxygen sensor instead of this bosch one.

Im also trying to get ahold of a l69 chip

your lucky, my 1990 celica runs around 4000rpms at 75mph... I am lucky to get 20 MPG if I travel above 70MPH...