FIXED: Idle weirdness, FIXED: Need a sanity check Options

[ctc911ctc]

All,

I posted this solution in another related post - wanted to close this one out.

**************PROBLEM SOLVED************

Picked up this car in October 2018,

I have fixed 100+ problems, some are listed below. I believe it is NOW ready for the road, it has not been registered since 1984.

When I pulled the Plenum (chasing the too rich issue) I was able to remove the CHT. Could not get a wrench on it prior. I replaced it. As I wrote above; after I got the fixed plenum back into the car, the idle adjustment screw had no effect. This according to the all knowing Anders, is the result of a car running too lean. which also caused the popping....

So I went back to the old CHT (I had not tested it, just changed it because of it's age and it is on near everyone's list of things to replace) and I found that it was open - No Good. Ahhhh, so this could be why the car is now LEAN!!!!!



I then went to the MCU and turned the dial from the all left position (I used to be chasing too rich as the result of the CHT) to something in the middle and now the car is running at what seems to be the correct mixture. No More Popping.

Changing the CHT if there are any rich/lean issues seems like a good place to start!

Next getting an O2 sensor from Mark Henry to vernier the mix-dial/idle-screw!

THANK YOU ALL TEENERS FOR THE SUPPORT! (IMG:style_emoticons/default/beerchug.gif) (IMG:style_emoticons/default/piratenanner.gif) (IMG:style_emoticons/default/beerchug.gif)











Hi,

'74 2.0 with 20K miles.

Issues:
- high throttle, cannot get it to 800/900 - 1400/1600 is where it stays
- When de-accelerating the throttle is slow to get back to around 1400

Symptoms
- Idle adjustment screw does not get the throttle to a lower speed
- ECU adjustment has no effect


So far I have:
- Injectors are rebuilt with new gaskets, seem to be installed tight and correctly
- Rebuilt THrottle body
- Cannot detect any Throttle body leaks around the shaft
- New Plenum to Throttle Body gasket
- Valve adjustment
- All new hoses
- MPS holds 15in for 30 seconds +, induction is proper
- dwell is 47deg

Next Steps

Double Check timing
Remove plenum and the 4 connecting tubes
Replace gaskets and connector fabric/rubber things that are between the tubes and Plenum.

I have read and near memorized the Anders post on Rennlist, looking for any advise as to my chosen path to get this nailed.


Many thanks in advance.

CTC911CTC