D-jet idle - one issue thats not been solved, low idle on start up for a few minutes hot or cold...... |
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D-jet idle - one issue thats not been solved, low idle on start up for a few minutes hot or cold...... |
DRPHIL914 |
Apr 6 2021, 06:04 AM
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#1
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Dr. Phil Group: Members Posts: 5,759 Joined: 9-December 09 From: Bluffton, SC Member No.: 11,106 Region Association: South East States |
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 |
BeatNavy |
Apr 6 2021, 07:23 AM
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#2
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Certified Professional Scapegoat Group: Members Posts: 2,924 Joined: 26-February 14 From: Easton, MD Member No.: 17,042 Region Association: MidAtlantic Region |
Going over 300 is not an issue especially with hard driving. I understand north of 350 regularly may be cause for attention. Pushing or exceeding 400 not good.
On my 2056 I was D-Jet. On my 2270 I'm Microsquirt with an idle air control valve. On both I have the Raby cam, and, as mentioned, first start of the day requires a few blips of the throttle. I think I've heard others say the same thing. I hadn't heard about PMB's FI solution. I need to check that out. |
GregAmy |
Apr 6 2021, 07:31 AM
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#3
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Advanced Member Group: Members Posts: 2,268 Joined: 22-February 13 From: Middletown CT Member No.: 15,565 Region Association: North East States |
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DRPHIL914 |
Apr 6 2021, 08:28 AM
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#4
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Dr. Phil Group: Members Posts: 5,759 Joined: 9-December 09 From: Bluffton, SC Member No.: 11,106 Region Association: South East States |
thanks for posting that and reminding me of this thread, i saw that a long time ago, very helpful, i really dont have oil temp issue when running due to the aux oil cooler, only whe car sits idling fro really long time i do see it go up higher around 230 but thats rare, so the head temp shooting up on al long hill pulling hard maybe hitting 350 briefly is not an issue especially with 20/50 synthetic race oil if i look at this correctly, i am not in danger of a dropped valve seat at those temps. yesterday i was bouncing between 250-280 but hit 320 very briefly. PW |
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