D-jet idle - one issue thats not been solved, low idle on start up for a few minutes hot or cold...... Options

[DRPHIL914]

here is my set up, - its a '75 2.0 d-jet with very fresh and new in past 2 years everything,
,tested proper functioning AAr, CHT is the new 914rubberone, but same issue with my NOS one, no vac leaks , rebuilt throttle body MPS(ive tested 2 others one rebuilt by Jeff B same issue), etc etc , 123 distributor, anywayhere is what i have going on-

i think i am around 1000 for a good steady idle, if its lower than that warmed up, then i cant get it to idle decent when cold for the first 2-3 minutes, even with AAr open, same with a hot start after running for a while, then shut off and turned back on after sitting foor a few minutes, heat sink on the CHT maybe, i have a feeling the resistance of the CHT is not correct, it is a NOS correct CHT but i am thinking about adding that resistor to the cht line- any thoughts? i have to feather or hold the pedal down just a bit for a minute or 2 then it comes up.

like i said perfect idle around 950-1000 once on for a while or even stopped at light after running for a long time idle is perfect EXCEPT after turned off for a bit then back on--

Phil

[Olympic 914]

My engine regularly gets head temps into the 300's

Also like Rob and Clay stated it will rarely idle cold until it has run for a for minutes.

Odd thing is if its REALLY cold like 30's it will idle then. But I have gotten in the habit of shutting it off for a moment to close the garage door, etc. then heel and toe it at the first two stop signs, to keep it running. After that it is fine for the rest of the drive.

BTW i believe you should not be using Synthetic 20/50, recommended a high zinc conventional 20/50 oil be used.

JMHO.

[ClayPerrine]

BTW i believe you should not be using Synthetic 20/50, recommended a high zinc conventional 20/50 oil be used.

(IMG:style_emoticons/default/agree.gif)

The 914 engine needs high zinc motor oil. Synthetic doesn't have that.

Clay

[DRPHIL914]

BTW i believe you should not be using Synthetic 20/50, recommended a high zinc conventional 20/50 oil be used.

(IMG:style_emoticons/default/agree.gif)

The 914 engine needs high zinc motor oil. Synthetic doesn't have that.

Clay

i may have misspoken about synthetic, i currently run 20-50 VR-1 Valvoline not sure if its part-synthetic or dino but it has the zppd, i also have used Driven and PennGrade, so i sould be ok on the zinc right??
@ClayPerrine
@Olympic_914
btw, drove to work today, outside temp was 55-60 and 30 minute 30 mile ddrive, drove most of the way at 63-65 mph as my 4th gear gives me about 3600rpm at 65, and my head temp were 285 on flat cruising, but varied in some stop and go and accel from 260 - 290, so with proper gearing i wil be just fine , . if i went up to 70 temp went to 305-310, and would go a bit higher if went into that 5th ZD gear with lower Rpm, - the tool kit is on the way and i will be swaping back in the stock 4&5 next weekend.

Phil