 The saga continues...., #3 cylinder not warming up, lean AFR |
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| era vulgaris |
 Apr 6 2016, 05:10 PM
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J is for Genius  Group: Members Posts: 982 Joined: 10-November 13 From: Raleigh, NC Member No.: 16,629 Region Association: South East States  |
So after being without my car for a month due to a vacuum leak on #2 cylinder, and then rebuilding my DRLA's, I spent monday tuning the car with a quick test drive, and then drove for about an hour and a half yesterday without issue. The car was fantastic on back roads and on the interstate. All the while my head temps and AFR were spot on perfect. I was stoked to be back on the road!
I go to start the car today, and of course, the AFR is way off to start. I figure I'm just going to have to tweak the carb sync a bit. Then as the car is warming up I see on my 4 channel head temp gauge, that cylinder #3 is conspicuously cold. The other cylinders all come up to their normal operating temp, but #3 is staying around 200 degrees and won't go warmer. The engine itself sounded 'off', like that cylinder wasn't firing. I tried changing spark plugs. Nothing. I tried blasting out the idle circuit several times with compressed air from both the idle jet side and the mixture screw side. Nothing. What else can I try? I don't know what possibly could've happened overnight for this to happen. The car sat in the garage untouched. |
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Posts in this topic
era vulgaris The saga continues.... Apr 6 2016, 05:10 PM
ThePaintedMan Stupud question, but did you check the idle jet it... Apr 6 2016, 05:21 PM
era vulgaris
Stupud question, but did you check the idle jet i... Apr 6 2016, 05:38 PM r_towle Did you ever change out the spark plug wires? Dist... Apr 6 2016, 05:45 PM era vulgaris
Did you ever change out the spark plug wires? Dis... Apr 6 2016, 06:38 PM zipedadoo It's got to be electrical, if you have a dead ... Apr 6 2016, 06:52 PM r_towle If you have a timing light, clip it onto that wire... Apr 6 2016, 07:45 PM era vulgaris
If you have a timing light, clip it onto that wir... Apr 6 2016, 07:59 PM 76-914 With the engine running, turn off the lights in th... Apr 6 2016, 09:12 PM porschetub
With the engine running, turn off the lights in t... Apr 7 2016, 12:59 AM JOEPROPER You can also try spraying with soapy water. (old ... Apr 7 2016, 04:25 AM rhodyguy Unisyn reads the same on all 4 venturis? Not just ... Apr 7 2016, 07:18 AM struckn Highly recommend you check compression. I had a si... Apr 7 2016, 08:12 AM ThePaintedMan
Highly recommend you check compression. I had a s... Apr 7 2016, 08:51 AM era vulgaris
:agree: With all of the issues you've been h... Apr 7 2016, 02:42 PM ThePaintedMan I would say that's about the right direction t... Apr 7 2016, 03:33 PM ssuperflyoldguy iffy plug? switch or put a new one in the problem ... Apr 7 2016, 03:45 PM type2man The next time it happens shut it off and remove th... Apr 7 2016, 04:03 PM rhodyguy You might be surprised with the vacuum readings af... Apr 7 2016, 04:40 PM era vulgaris Mixture screw on #3 went all the way in with no ch... Apr 7 2016, 05:40 PM The Cabinetmaker Any time something happens just after I do some ma... Apr 7 2016, 05:45 PM era vulgaris It feels like lately anytime I do any maintenance,... Apr 7 2016, 07:45 PM era vulgaris So I've removed the carb and disassembled it t... Apr 9 2016, 01:26 PM MarkV I had a problem with one of my Dellorto idle screw... Apr 9 2016, 01:57 PM era vulgaris
I had a problem with one of my Dellorto idle scre... Apr 9 2016, 02:58 PM Series9 One side of the engine having a problem tends to b... Apr 9 2016, 04:36 PM Series9 Then, swap plugs and wires on that side of the eng... Apr 9 2016, 04:43 PM Series9 Swap idle jets, main jets, emulsion tubes, etc aro... Apr 9 2016, 04:51 PM ThePaintedMan :agree: With Joe. You already did the comp test. Y... Apr 9 2016, 05:37 PM era vulgaris
One side of the engine having a problem tends to ... Apr 9 2016, 06:06 PM ThePaintedMan Okay. Now I'm tracking. Plug is not wet and yo... Apr 9 2016, 06:19 PM era vulgaris
Okay. Now I'm tracking. Plug is not wet and y... Apr 9 2016, 09:41 PM r_towle Remove and rebuild that carb, again.
Check to mak... Apr 9 2016, 08:39 PM rhodyguy When you blow air thru the idle jet, out of carb, ... Apr 10 2016, 08:04 AM JOEPROPER Try to artificially enrich the effected cylinder t... Apr 10 2016, 08:56 AM ssuperflyoldguy I'm feeling your pain. Can you switch carbs si... Apr 10 2016, 11:16 AM era vulgaris
When you blow air thru the idle jet, out of carb,... Apr 10 2016, 11:54 AM rhodyguy The Utah co WAS A.C.E. (Air cooled engineering). T... Apr 10 2016, 01:13 PM ThePaintedMan I've got a set of Dell 40s here that I'm g... Apr 10 2016, 02:06 PM era vulgaris I just put the carb back on and still nothing on t... Apr 10 2016, 02:21 PM rhodyguy That's it! Apr 10 2016, 02:40 PM r_towle Hey,
Do you want me to ship you a set of bolt n ... Apr 10 2016, 02:42 PM rhodyguy Hate to be a repetitive tool. You can blow thru th... Apr 10 2016, 02:43 PM r_towle
Hate to be a repetitive tool. You can blow thru t... Apr 10 2016, 02:43 PM era vulgaris
Hate to be a repetitive tool. You can blow thru t... Apr 10 2016, 02:49 PM r_towle It was funny to me, but i am bored out. My mind. Apr 10 2016, 02:44 PM rhodyguy That's ok. Blowing thu a idle jet fresh out of... Apr 10 2016, 02:46 PM era vulgaris
That's ok. Blowing thu a idle jet fresh out o... Apr 10 2016, 02:49 PM rhodyguy The jet is not fouled. Apr 10 2016, 02:51 PM MarkV You said they worked after you rebuilt them and th... Apr 10 2016, 02:56 PM era vulgaris
You said they worked after you rebuilt them and t... Apr 10 2016, 03:14 PM MarkV Change the idle speed as water gets sucked into th... Apr 10 2016, 03:36 PM porschetub
Change the idle speed as water gets sucked into t... Apr 11 2016, 01:30 AM rhodyguy Long shot here. Looking at an illustration in toml... Apr 10 2016, 05:29 PM era vulgaris
Long shot here. Looking at an illustration in tom... Apr 10 2016, 06:25 PM rhodyguy Like said, long shot. There's only so many pla... Apr 10 2016, 06:29 PM era vulgaris
Perplexed. I surrender.
I'm in the same boa... Apr 10 2016, 07:20 PM MarkV I have used spray carb cleaner in the past but did... Apr 11 2016, 09:19 AM era vulgaris
I have used spray carb cleaner in the past but di... Apr 11 2016, 02:18 PM MarkV The plastic spacers I used have thin gasket materi... Apr 11 2016, 02:53 PM era vulgaris
The plastic spacers I used have thin gasket mater... Apr 11 2016, 05:29 PM timothy_nd28 If this was my car, I would yank the carbs and ins... Apr 11 2016, 03:48 PM era vulgaris
If this was my car, I would yank the carbs and in... Apr 11 2016, 05:26 PM MarkV If the plastic spacers are just plastic with no pa... Apr 11 2016, 05:56 PM ThePaintedMan :agree: ... you definitely need more than just the... Apr 11 2016, 06:33 PM era vulgaris Well damn, I can't believe it might something ... Apr 11 2016, 06:50 PM ThePaintedMan Hope so too. Not getting my hopes up, but it's... Apr 11 2016, 07:03 PM timothy_nd28 Ljet should work fairly well with your size engine... Apr 11 2016, 07:18 PM Rand Hang in there Era. There's no doubt there is a... Apr 11 2016, 07:27 PM MarkV If you have some 3M spray glue or some of that Per... Apr 11 2016, 07:31 PM rhodyguy Ed, you're saying the spacers are just plain m... Apr 12 2016, 06:38 AM era vulgaris Yeah its just plastic with none of the paper mater... Apr 12 2016, 07:06 AM rhodyguy Maybe an issue with the intake to carb base juncti... Apr 12 2016, 08:19 AM The Cabinetmaker if the phenolic spacers have no gaskets, then they... Apr 12 2016, 08:59 AM 76-914 Gotta be it. Everything so far has pointed to a va... Apr 12 2016, 04:37 PM era vulgaris Cheers to that :beer2:
I think this is my longes... Apr 12 2016, 06:00 PM MarkV Did you get it to work? Apr 19 2016, 10:16 AM era vulgaris
Did you get it to work?
Still waiting for the g... Apr 19 2016, 01:29 PM stugray I have always used the phenolic spacers and RTV Bl... Apr 19 2016, 11:30 AM r_towle I fell off this one.....recovering on stupid pills... Apr 19 2016, 01:37 PM era vulgaris No worries, Rich! I'll see if these new g... Apr 19 2016, 01:39 PM era vulgaris YYYYYYYEEEEEEEEEEEEEEEESSSSSSSSSSSSSSSSSSS!... Apr 21 2016, 02:03 PM stugray
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Lesson learned about those phenolic spacers ... Apr 21 2016, 02:11 PM DBCooper Damn! That's what I was going to suggest ... Apr 21 2016, 02:09 PM era vulgaris
Damn! That's what I was going to suggest... Apr 21 2016, 02:23 PM Rand Spacers were never intended to be gaskets. It... Apr 21 2016, 02:31 PM era vulgaris
Spacers were never intended to be gaskets.
Tell... Apr 21 2016, 02:33 PM rhodyguy Happy motorvating. Apr 21 2016, 02:48 PM Rand Oof, yeah. And it's not always so simple becau... Apr 21 2016, 02:49 PM era vulgaris Well after all the headscratching I caused you guy... Apr 21 2016, 02:57 PM 76-914 Great news. I was hoping this is would have a good... Apr 21 2016, 03:12 PM era vulgaris
Great news. I was hoping this is would have a goo... Apr 21 2016, 04:56 PM ThePaintedMan Glad we were able to get it figured out Dustin. So... Apr 21 2016, 05:05 PM era vulgaris Haha, yeah I bet you would've known from the g... Apr 21 2016, 08:18 PM  |
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