 DJet Problems, 3000-4000 RPM Stumble |
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| yeahmag |
 Jun 29 2012, 12:21 PM
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#1
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Advanced Member  Group: Members Posts: 2,448 Joined: 18-April 05 From: Pasadena, CA Member No.: 3,946 Region Association: Southern California 
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I'm helping a friend with a DJet issue and I use to consider myself pretty good with this system, but I'm running out of ideas with this one. There is a considerable stumble at steady-state, 3000-4000 RPM. So far I've done the following:
* Replaced his dizzy with one of my good ones - re-timed. * Replace his spark plug cables, rotor, and cap known good ones. * Disabled the TPS to rule that out. He's running a Petronix Ignitor that we swapped over to my dizzy. I'm starting to suspect it, but what keeps me from changing that out is that it runs well at WOT. It really feels like a spark/timing issue... What am I missing here??? -Aaron |
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| pbanders |
Jun 30 2012, 03:21 PM
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#2
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Senior Member Group: Members Posts: 943 Joined: 11-June 03 From: Phoenix, AZ Member No.: 805 |
Sounds like ignition to me. You did everything but the Pertronix, swap in points and see if it goes away. If not, check injector spray patterns and delivery. I'm assuming this engine pulls a good intake vacuum, has good compression on all cylinders, and has had the valve clearance recently set.
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Posts in this topic
yeahmag DJet Problems Jun 29 2012, 12:21 PM
Racer Chris I doubt its the pertronix.
Maybe one injector is w... Jun 29 2012, 12:48 PM yeahmag That's not a bad idea. I'll have him pull ... Jun 29 2012, 12:52 PM 76-914 Ign on and pushing the throttle will activate inj... Jun 29 2012, 01:01 PM
Racer Chris
... wouldn't pulling temp sensor II do the sa... Jun 29 2012, 01:35 PM vsg914 Temp sender two is the head temp sensor. Pull it a... Jun 29 2012, 01:26 PM 76-914 My bad; temp sensor I. Air intake sensor..... and ... Jun 29 2012, 01:29 PM vsg914 You said you disabled the tps to rule it out. Did ... Jun 29 2012, 01:32 PM yeahmag No. It did not run better.
You said you disabled... Jun 29 2012, 02:53 PM 914_teener
No. It did not run better.
You said you disable... Jun 29 2012, 03:34 PM yeahmag Fuel pressure was set a bit ago, but warrants re-c... Jun 29 2012, 03:40 PM |
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