 Stumbly start...then fine, just like me leaving a bar |
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| iankarr |
 Jul 16 2023, 03:48 PM
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#21
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The wrencher formerly known as Cuddy_K  Group: Members Posts: 2,481 Joined: 22-May 15 From: Heber City, UT Member No.: 18,749 Region Association: Intermountain Region 
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Hi Guys,
Trying to diagnose a strange issue. Here are the vital stats: 2056 with Djet, raby 9550 cam. Fuel pressure at 29-30, timing spot on, new plugs/wires, 123 dizzy. When I start the car, whether dead cold or warm, the engine turns over and catches right away, but it stumbles as if only firing on 2 cylinders for about 5 seconds. A few pumps of the accelerator and the stumble goes away and car idles fine. There's a slight smell of unburnt fuel after start. Other item which could possibly be related: new CHT sensor from 914Rubber which is said to conform to 0 280 130 012 spec. Thoughts? Thanks! |
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Posts in this topic
iankarr Stumbly start...then fine Jul 16 2023, 03:48 PM
Superhawk996 At one point I measured a new in bag 012 sensor vs... Jul 16 2023, 04:11 PM BeatNavy Yo Ian!
I've had two engines with Raby 95... Jul 16 2023, 04:15 PM
ClayPerrine
Yo Ian!
I've had two engines with Raby 9... Jul 17 2023, 05:48 AM emerygt350 I bet it is a cht issue. I wonder if you could se... Jul 16 2023, 04:23 PM iankarr Thanks, guys. I was thinking CHT too, but it only ... Jul 16 2023, 04:27 PM Superhawk996
Could the CHT sensor could be that responsive?
Y... Jul 16 2023, 04:42 PM iankarr Good point. I was just thinking it would take long... Jul 16 2023, 04:51 PM rfinegan my 75 does this too.. and I have to blip the engin... Jul 16 2023, 04:52 PM iankarr CHT measured at 1500 @80 degrees, so it looks in l... Jul 16 2023, 07:22 PM 914_teener It's the cam. Once warm it runs like a raped a... Jul 17 2023, 10:48 AM emerygt350
It's the cam. Once warm it runs like a raped ... Jul 17 2023, 03:48 PM Geezer914 I too am running a 9550 cam, same issue, but great... Jul 17 2023, 01:58 PM iankarr Interesting. Can anyone explain the process by whi... Jul 18 2023, 02:49 PM emerygt350 I would suspect it is on the fringe of confusing t... Jul 18 2023, 03:04 PM BeatNavy I’m running it on Microsquirt where basically al... Jul 18 2023, 03:11 PM StarBear
I’m running it on Microsquirt where basically a... Jul 18 2023, 07:11 PM StarBear @iankarr
[b]@[url=http://www.914world.com/bbs2/i... Jul 19 2023, 02:05 PM BeatNavy Hey Steve, not sure what exactly you're asking... Jul 20 2023, 05:40 AM StarBear
Hey Steve, not sure what exactly you're askin... Jul 20 2023, 06:29 AM TheCabinetmaker I run a 9550 cam 2056. Do not have that problem. H... Jul 20 2023, 08:53 AM Literati914 The CHT extension piece from 914ltd is said to imp... Jul 20 2023, 09:47 AM Porschef
The CHT extension piece from 914ltd is said to im... Jul 20 2023, 11:01 AM Geezer914 There was a resistor that AA sold to attach to the... Jul 23 2023, 01:34 PM  |
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