 ‘74 1.8L L-Jetronic Cold Start Low Idle, Mystery solved! |
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| Van B |
  Nov 7 2021, 04:01 PM
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#1
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Senior Member  Group: Members Posts: 1,621 Joined: 20-October 21 From: WR, GA Member No.: 26,011 Region Association: None 
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Ok fellas, here’s the run down Aux Air Regulator (AAR) and Cold Start Valve (CSV)/injector both work fine. Many of you have also been keeping up with my high idle issue that we figured out.
But yet, when the car is cold, i.e. room temp, I don’t get the high idle I should on start-up. Instead she cranks a bit and then lumbers to life. Idle lopes around 700-800rpm and then smooths out as it warms. In all other aspects of operation, the engine seems to be pretty happy. Thoughts? Experience? (IMG:style_emoticons/default/confused24.gif) -Van See post #419 on page 14 for a synopsis of the outcome. |
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Posts in this topic
Van B ‘74 1.8L L-Jetronic Cold Start Low Idle Nov 7 2021, 04:01 PM
emerygt350 This kind of knowledge storage is awesome, but a l... Feb 21 2022, 05:39 PM
wonkipop
This kind of knowledge storage is awesome, but a ... Feb 21 2022, 07:07 PM Van B flum·moxed
/ˈfləməkst/
adjective
adjective: fl... Feb 21 2022, 09:12 PM wonkipop there is only the AFM left to go?
it could be in ... Feb 22 2022, 02:50 AM emerygt350 Any of you 1.8people have an O2 sensor installed? Feb 22 2022, 07:08 AM wonkipop
Any of you 1.8people have an O2 sensor installed?... Feb 22 2022, 10:03 AM emerygt350 No, I mean for knowing your afr. I have one in my... Feb 22 2022, 12:28 PM StarBear
No, I mean for knowing your afr. I have one in m... Feb 22 2022, 12:36 PM Van B
No, I mean for knowing your afr. I have one in m... Feb 22 2022, 03:08 PM StarBear Not that I’m aware of, though after 48 years sti... Feb 22 2022, 07:57 AM StarBear “Everything is hunky-dory when it’s warm.” K... Feb 22 2022, 10:07 AM emerygt350 Knowing it is too rich or too lean can point you t... Feb 22 2022, 03:04 PM wonkipop its way dumber than that @Emerygt350 .
you can a... Feb 22 2022, 04:49 PM emerygt350 Well, something is up. Knowing couldn't hurt.... Feb 22 2022, 06:23 PM wonkipop
Well, something is up. Knowing couldn't hurt... Feb 22 2022, 06:34 PM Van B
Well, something is up. Knowing couldn't hurt... Feb 22 2022, 09:32 PM emerygt350 Temp sensors can be tricked with pots and resistor... Feb 22 2022, 06:28 PM Van B Manual doesn’t tell me what pins to check for te... Feb 22 2022, 07:22 PM Van B Without the tester specified in the manual, there ... Feb 22 2022, 08:41 PM wonkipop try this.
its from another L jet manual i have.
un... Feb 22 2022, 09:07 PM wonkipop looks like your info is same as mine.
if you test... Feb 22 2022, 09:10 PM Van B I pulled the cover and it’s nearly new in there.... Feb 22 2022, 09:23 PM wonkipop is the flap moving freely in the intake plenum cha... Feb 22 2022, 09:45 PM wonkipop am thinking there is one last test you can do.
it... Feb 22 2022, 10:07 PM Van B It moves like it’s made of butter. But I don’t... Feb 22 2022, 10:54 PM wonkipop
It moves like it’s made of butter. But I don’... Feb 23 2022, 01:06 AM wonkipop this is of interest van.
in 5 parts.
guy with an ... Feb 23 2022, 07:47 PM Van B
this is of interest van.
in 5 parts.
guy with an... Feb 23 2022, 10:47 PM wonkipop
[quote name='wonkipop' post='2983820' date='Feb 2... Feb 24 2022, 12:39 AM StarBear :headbang: :beer1: Feb 23 2022, 08:49 PM Van B A weird thing happened last night. I went out to ... Feb 24 2022, 09:18 AM emerygt350 Very interesting! Feb 24 2022, 10:56 AM Van B
Very interesting!
To put it mildly.
I plan ... Feb 24 2022, 11:18 AM rjames
Very interesting!
To put it mildly.
I plan... Feb 24 2022, 12:21 PM wonkipop
A weird thing happened last night. I went out to... Feb 24 2022, 05:10 PM emerygt350 I have an ancient dwell meter from back in the 80s... Feb 24 2022, 12:29 PM Van B
I have an ancient dwell meter from back in the 80... Feb 24 2022, 01:00 PM StarBear
I have an ancient dwell meter from back in the 8... Feb 24 2022, 04:00 PM StarBear @Van will do and let you know.
Yes, get a dwell... Feb 24 2022, 12:44 PM emerygt350 As long as the points go, you should be better off... Feb 24 2022, 02:33 PM wonkipop
As long as the points go, you should be better of... Feb 24 2022, 05:14 PM Van B you mean the ole full throttle 4th to 3rd? That s... Feb 24 2022, 02:36 PM StarBear @Van B didn’t get hone till late and snow/ice ... Feb 24 2022, 04:57 PM wonkipop @Van B
those you tube videos with AFM - you can... Feb 24 2022, 05:39 PM Van B Like I said earlier, I pulled the top off and ever... Feb 24 2022, 05:57 PM wonkipop
Like I said earlier, I pulled the top off and eve... Feb 24 2022, 06:09 PM wonkipop ok
i just did it.
it started.
straight away like... Feb 24 2022, 07:26 PM Van B So mine ran for several minutes without the AFM pl... Feb 24 2022, 07:36 PM wonkipop
So mine ran for several minutes without the AFM p... Feb 24 2022, 07:42 PM emerygt350 Wow, I think you guys are on to something! No... Feb 24 2022, 07:37 PM Van B
Wow, I think you guys are on to something! N... Feb 24 2022, 09:11 PM wonkipop after reading one of your posts a few back where y... Feb 24 2022, 07:37 PM wonkipop well we know you have a good strong set of new com... Feb 24 2022, 08:00 PM wonkipop ok you got me thinking.
there is a variation on t... Feb 24 2022, 08:32 PM Van B Regarding your 912E reference, that is entirely de... Feb 24 2022, 09:07 PM wonkipop yeah van
but what i have been thinking is that 1.... Feb 24 2022, 10:00 PM wonkipop re those thermo switches.
the temp rating means a... Feb 24 2022, 10:34 PM djway If you are starting without the pin hooked up you ... Feb 24 2022, 10:54 PM Van B
If you are starting without the pin hooked up you... Feb 25 2022, 12:23 AM wonkipop
[quote name='djway' post='2984079' date='Feb 24 2... Feb 25 2022, 01:50 AM wonkipop re running without the pin hooked up and fuel pump... Feb 25 2022, 01:39 AM StarBear Still snowy, icy and sleet here today. Possibly to... Feb 25 2022, 08:24 AM Van B No worries! I appreciate the assist! Feb 25 2022, 10:15 AM wonkipop ok @[url=http://www.914world.com/bbs2/index.php?s... Feb 25 2022, 08:08 PM wonkipop test 2 for you @Van B
light pictorial relief of... Feb 25 2022, 10:28 PM Van B Thanks @wonkipop love the pic too! Kinda cap... Feb 25 2022, 10:54 PM wonkipop was interested myself in how the fuel pump runs at... Feb 25 2022, 11:29 PM djway AFM needed to close the circuit.
You probably ran ... Feb 26 2022, 12:37 AM wonkipop
AFM needed to close the circuit.
You probably ran... Feb 26 2022, 01:05 AM Van B
AFM needed to close the circuit.
You probably ra... Feb 26 2022, 09:25 AM wonkipop
[quote name='wonkipop' post='2984265' date='Feb 2... Feb 26 2022, 09:44 AM StarBear Ok folks, here are my results. Day at about 35F:
T... Feb 26 2022, 01:16 PM Van B @StarBear [b]@[url=http://www.914world.com/bbs2/... Feb 26 2022, 03:46 PM StarBear :worship: Feb 26 2022, 04:05 PM emerygt350 That sounds like a good start! I would not be... Feb 26 2022, 04:18 PM Van B @emerygt350
Me either. That would bring the total... Feb 26 2022, 04:59 PM wonkipop f-en weird.
i did not try repeated cranks on mine... Feb 26 2022, 05:40 PM StarBear
f-en weird.
i did not try repeated cranks on min... Feb 26 2022, 06:13 PM wonkipop
f-en weird.
i did not try repeated cranks on mi... Feb 26 2022, 06:20 PM wonkipop
f-en weird.
i did not try repeated cranks on mi... Feb 26 2022, 06:45 PM wonkipop it sounds like you might have cracked it with your... Feb 26 2022, 06:00 PM Van B I honestly can’t understand the point of the OE ... Feb 26 2022, 07:13 PM wonkipop
I honestly can’t understand the point of the OE... Feb 26 2022, 07:46 PM Van B Yeah the mounting location is still there on mine.... Feb 26 2022, 07:54 PM wonkipop
Yeah the mounting location is still there on mine... Feb 26 2022, 10:08 PM wonkipop re having three ports.
the mercs had the same thi... Feb 26 2022, 07:55 PM Van B Well… I’m not out of the woods yet fellas. I j... Feb 26 2022, 09:09 PM wonkipop
Well… I’m not out of the woods yet fellas. I ... Feb 26 2022, 10:10 PM Van B I haven’t pulled up the carpet, but I know I hav... Feb 26 2022, 10:46 PM emerygt350 Yeah, stock. Feb 26 2022, 11:35 PM wonkipop
Yeah, stock.
......and ready to burn with 35lbs... Feb 27 2022, 12:08 AM wonkipop RE: ‘74 1.8L L-Jetronic Cold Start Low Idle Feb 27 2022, 12:13 AM wonkipop oh yeah.
just been for a nice drive in mine.
pull... Feb 27 2022, 12:17 AM wonkipop @Van B
i sat down with mike today at lunchtime a... Feb 28 2022, 02:07 AM Van B
[b]@[url=http://www.914world.com/bbs2/index.php?s... Feb 28 2022, 08:37 AM wonkipop
[b]@[url=http://www.914world.com/bbs2/index.php?... Feb 28 2022, 05:06 PM wonkipop ........and he had a view on why your cars ran.
s... Feb 28 2022, 02:32 AM StarBear
........and he had a view on why your cars ran.
... Feb 28 2022, 07:37 AM Van B So, I do not hear my fuel pump running when the ig... Feb 28 2022, 08:20 AM wonkipop @[url=http://www.914world.com/bbs2/index.php?showu... Feb 28 2022, 04:14 PM  |
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