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[celica842]

My edu has two plugs went ahead and ordered a vacuum dizzy.. Hopefully be here tomorrow. Thanks for all the help!!!

[danf]

Make sure you compare the two distributors to make sure they're the same length, and critically, it seats in the same place.

[ozzie]

The 84 and 85 dizzys are the same length with the same gear size/position, I posted a pic a while back showing it. Mine was actually a '94 distributor, but same diff.

[celica842]

Got the new dizy in and yes she runs a lot better now just need to finish the exhaust so she has back pressure..oh one last question there are two vacuum nipples in the dizz and I looked up pics and I hooked them up to match the pics I've seen but does it matter which one go gets vacuum all the time? The other port on the throttle body I suspect is only vacuum at wot?

[RedCar]

Here's the diagram:


I'm trying to figure out what the logic behind the dual diaphragm distributor is...

Here's my guess:
outer diaphragm (main advance port) maintains some advance at idle
inner diaphragm (sub advance port) cancels the vacuum advance whenever throttle opens & centrifugal advance to takes over

[Teranfirbt]

I believe it's a way to prevent the car idling low when the alternator is loaded up. At normal idle it'll pull a few degrees of timing when manifold vacuum is high, but as RPM drops with load increase, it will see less manifold vacuum and increase timing to increase power a bit to maintain idle.

[celica842]

Awesome I for sure have it hooked up wrong.. I did drive it today and I think I need to readjust the throttle stop and tps under load she's cutting out like she's hitting the fuel cut off but round 1 I adjusted the throttle stop to keep her running now that I have ever thing close to right need to readjust that.. But with any luck she'll be going to the exhaust shop tomorrow I think I got header adjusted where it should clear the steering ill know in the morning.. Maybe I should wait to adjust anything till the exhaust shop is done.

[celica842]

https://www.facebook.com/100000929636263/posts/3983064745067807/?app=fbl well turns out the lower intake manifold gasket was causing a vacuum leak as well as leaking coolant.. Replaced with a felpro and she runs like she should now. Thank you guys for all the help.. Now off to the exhaust shop and inspection station.

[irmicken]

Can't wait to see how it turns out.

[celica842]

Well dropped off at the exhaust shop Wednesday got a call she was ready today. Was kinda surprised they went this route but I'm really loving the look and the sound.. I was expecting a regular muffler with a cat but no cat was installed.. still loving it.

[celica842]

A little update I installed a pke push button remote start system.. and an aftermarket centeral door locks everything went together pretty easy but I'm still working on getting the two to talk I think I found a way but waiting on parts..  I love the unlock and disarm automatically when I walk up and arm and lock when I walk away. I didn't hook up the horn though that would get on my nerves. I did get the chance to take it on the hwy had to travel for work and I found out I have a vibration at 70-75 goes away at 80. Took it to ntb thinking a tire was out of balance said rear ujoint was shot.. well when I put the drive shaft in I felt a tiny bit of play wouldn't say it was shot..but just ordered some ujoints from Rockford part number 430-10 so she's been parked till I can get those in.. not blowing up another rear end.. how ever I do have a question going down the hwy if the rpm is steady like holding 3000 rpm in 5th gear doing 80 my check engine light comes on.. I even tried in city streets if the rpm is constant doesn't matter speed or rpm the light come on soon as I change the rpm goes off nothing is stored.. thought everything was hooked up correctly she runs great. Just wondering why the light comes on and how to correct it.

[sirdan]

Do you have a heated o2 sensor? usually if you go to a header and use the stock non heated o2 it will throw a code cruising because the sensor gets too cold. Heated o2 sensors are 4 wire if you get one for a 4 runner or pickup that is 4 wire and wire the extra wires for the heater up you should be good to go.

[celica842]

Awesome I will get that done thanks.

[celica842]

Sorry been awhile drove the Celica for a few weeks and discovered I got a rear main seal leaking and I lost my speedometer (the clip on the drive gear on the shaft broke) I did get another one but decided it was time for paint and body work the cheap maco paint job the previous owner had done.. going to go to a metallic blue... Addressing the rust in the hatch is the hardest thing thus far..

[celica842]

More pics