To Do List for my 1979 Chief

[wiley-moeracing]

Do you have the pvc hose hooked into the air cleaner? If so you could be sucking in oil through that, if not then you may have some valve sealing issues in the heads?

[wincher]

Yes the crankcase breather is connected with the air Cleaner.

[wiley-moeracing]

This could be why your venturi's are dirty, the venturi's should not get dirty with use unless you have a motor pushing oil out into the pvc system and into the air cleaner housing or you have backfires through the carb.

[wincher]

Is this normal with Original breather on the air cleaner.?
Foam plastic missing for oil Dust?

[wincher]

Test with 95 sec jets and pump linkage in the upper hole.
road to mountain valley station 1050 m about see level uphill and downhill



idles about 13,5-14
WOT uphill, fast accerlation 12,5 (+- 0,3?)

WOT never under 12.

compare with the edelbrock carb owens manual page 3, with the diagramm A/F ratio. edelbrock says: best power between 12-13 )
slowly uphill behind a camper, nearly idle.. 11,5
pet the pedal to drive so slowly and it is rich??


normal cruising flat road :14-15

downhill with engine break,shutoff up to 20. 20 is end of scale

i think the bog is nearly gone!

summary i have no very rich unter 11 or lean over 17 Ratio

except the very slow uphill drive is remarkable
good driveable



(Have to check my pedal and bowden cable.
the pedal hangs light in idle position,i cant accelerate smooth
this is new.

I have nothing changed with the cable.
Maybe the pump is to far out and jam up)

[wincher]

Hi,
this is not the current status.

Fuel and oil pressure works, Temp not or only a little
have changed the temp sender to times.

Sender ok. 5 V from new CVR to sender ok. Resistance from sender ot ground/Battery ok. I think the gauge is the failure.

The failure

having not temp gauge makes me crazy


are the capacitors needed with the 7805 voltage regulator?
Have built the CVR new again. One CVR for all guages,without the capacitors


is it possible to fix the gauge?? open it and put out the old cvr or something like that??
or is a new gauge needed.

[rang-a-stang]

I didn't have to add a capacitor to my CVR.

If your other gauges that use the 5v reference are working correctly (Fuel and oil), then the issue must either be the Temp sender (doubtful since you have replaced it twice), wiring to/from the gauge (doubtful since when you ground the sender wire, the Temp gauge sweeps) or the gauge itself.

Since you have added your own external 5V, make sure the old CVR is bypassed inside the gauge. If it is not, you have the wrong voltage on the guage itselt and it will not work. Here is what I am talking about electrically on the diagram:

The red line shows where you need to make sure there is no voltage (cut the line).

Here is how it looks, practically:

On mine, I was able to shrink wrap the post and that isolated everything.

[babywag]

just fyi you should mimic 6v system for guages.
meaning a 7.5v regulator should be used vs. 5v

[wincher]

I didn't have to add a capacitor to my CVR.

If your other gauges that use the 5v reference are working correctly (Fuel and oil), then the issue must either be the Temp sender (doubtful since you have replaced it twice), wiring to/from the gauge (doubtful since when you ground the sender wire, the Temp gauge sweeps) or the gauge itself.

Since you have added your own external 5V, make sure the old CVR is bypassed inside the gauge. If it is not, you have the wrong voltage on the guage itselt and it will not work. Here is what I am talking about electrically on the diagram:

The red line shows where you need to make sure there is no voltage (cut the line).

Here is how it looks, practically:

On mine, I was able to shrink wrap the post and that isolated everything.

Oh no!
I have the gauge out and in the hand and was scared about open it.


Stop:

I have 5V on A3 from my 5 V CVR

The gauge is between A3 and S3
I ist out of function, have no 12 V from 14 to 15 because my radio supression is out
based on this the old gauge cvr has no effect.
what am i doing wrong?

[wincher]

just fyi you should mimic 6v system for guages.
meaning a 7.5v regulator should be used vs. 5v

All i have read was with the 5V CVR and i followed the instructions:

https://www.fsjnetwork.com/forum/viewtopic.php?f=10&t=8334&sid=ee801500ba849f9bdd26f912a08594f8&start=40

fuel gauge seems ok.
oil pressure is less to zero but this is "quite normal" with an old AMC or a known problem.

[rang-a-stang]

Oh no!
I have the gauge out and in the hand and was scared about open it.

Stop:

I have 5V on A3 from my 5 V CVR

The gauge is between A3 and S3
....
based on this the old gauge cvr has no effect.
what am i doing wrong?

Right, but if there is a ground or some voltage on that pin inside your gauge from your old CVR, then the signal from your sender is either being grounded or thrown off. You have to break that line. I am pretty sure this is your problem...

...
I ist out of function, have no 12 V from 14 to 15 because my radio supression is out
...

I am pretty sure this is not an issue.

[wincher]

Right, but if there is a ground or some voltage on that pin inside your gauge from your old CVR, then the signal from your sender is either being grounded or thrown off. You have to break that line. I am pretty sure this is your problem...


I am pretty sure this is not an issue.

Ok, i will try it soon. . Now i have to brush the wood for my garage

[wincher]

I have separated the "I" with electrical tape from "A"
(Red tape between the I to A contact)

#1 is before the isolation, #2 is after the isolation.

The A to ground resistence is too low.

What i do to do is to cut of the thin wire? Red marked in the pic.
This goes from "A" to ground..


Edit: I cant wait. The thin wire is cut off. now from A to ground ist ZERO ohms


original status with the cvr in the gauge:
in which case does the contact from I to A open? Overheating the CVR? and than all gauges are out of function??

[wincher]

i worked with Chart 6 : temp Gauge not functioning...


A to ground is 26,7 ohms
S to ground is 43,4 ohm
S to A is 20,1 ohm
4 66V at S
5.01 V at A


I put the sending unit out and it has 175 ohm.

approxiamately 100 ohm to much at about 16 degrees celsius.
I can swear i have measured 43,1 ohm at the unit before i put it out


Have changed it two times...

are the crown parts such a scrap?
Is the J3177594 the right part for the gauge
(73 ohms cold to 9 ohms hot)

[wincher]

Are the front springs from a 89 Wagooner the same as in the 78 Chief?
I think so.
A wagoneer gets Parted and i can Buy it ...