 2056 D-jet, running poorly, CHT on #4 is waay off |
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| Bill Meyer |
 Mar 15 2012, 03:04 PM
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#1
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Newbie  Group: Members Posts: 44 Joined: 11-October 07 From: Prairie Village, KS Member No.: 8,210  |
My fresh 2056 is really running poor during break in, low power, slight miss maybe. One of the issues I've noticed is when using a laser temp gauge (pointed at the exhaust manifold, directly off the head) I've found #4 is running around 230 Degrees while all other cylinders are in the 330-360 range. I suppose it's more of a EGT temperature as I'm measuring the header, not the head, but regardless number 4 is out of whack and probably where some of my trouble is.
Pulling the #4 plug and it is noticibly wet, sort of oily too. I've got good spark there, swapped plugs too, checked wires. Any ideas what to look for next? |
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| VaccaRabite |
Mar 15 2012, 05:25 PM
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#2
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En Garde! Group: Admin Posts: 13,465 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
#4 is not firing, or only firing intermittantly. You car probably feels like it has no power at all.
Carbs? If so, pull the idle jet and clean the circuit, then do the same for the mains. But it was always my idles that got crap in them. Clean the spark plug. Fouled plug won't spark. Check valves and the other stuff, but if it was a new build they should be fine. Zach |
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| ChrisFoley |
Mar 15 2012, 06:21 PM
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#3
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I am Tangerine Racing Group: Members Posts: 7,937 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None 
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QUOTE(Vacca Rabite @ Mar 15 2012, 06:25 PM)  #4 is not firing, or only firing intermittantly. You car probably feels like it has no power at all. Carbs? If so, pull the idle jet and clean the circuit, then do the same for the mains. But it was always my idles that got crap in them. Clean the spark plug. Fouled plug won't spark. Check valves and the other stuff, but if it was a new build they should be fine. Zach (IMG:style_emoticons/default/slap.gif) OP says he has good spark. Title says D-jet. I can think of two things: Intake leak; bad injector |
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| Bill Meyer |
Mar 15 2012, 08:27 PM
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#4
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Newbie Group: Members Posts: 44 Joined: 11-October 07 From: Prairie Village, KS Member No.: 8,210 |
Thanks Chris, I do have an extra injector so I'll try that tomorrow. As for intake leak, do you mean on the runners with the large rubber connector? or is there another place they can leak?
QUOTE(Racer Chris @ Mar 15 2012, 07:21 PM) QUOTE(Vacca Rabite @ Mar 15 2012, 06:25 PM) #4 is not firing, or only firing intermittantly. You car probably feels like it has no power at all. Carbs? If so, pull the idle jet and clean the circuit, then do the same for the mains. But it was always my idles that got crap in them. Clean the spark plug. Fouled plug won't spark. Check valves and the other stuff, but if it was a new build they should be fine. Zach (IMG:style_emoticons/default/slap.gif) OP says he has good spark. Title says D-jet. I can think of two things: Intake leak; bad injector |
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Posts in this topic
Bill Meyer 2056 D-jet, running poorly, CHT on #4 is waay off Mar 15 2012, 03:04 PM
aircooledtechguy To check for an intake leak, get the engine idling... Mar 15 2012, 09:05 PM Prospectfarms Last summer Cap'n K. posted a refinement to th... Mar 17 2012, 09:23 PM 76-914 You don't have 3 & 4 inj leads crossed do ... Mar 17 2012, 09:48 PM
Bill Meyer Not sure, but wouldn't that cause both 3 and 4... Mar 20 2012, 08:52 PM 76-914 Nope, just makes it run like hell. Ask me how I k... Mar 20 2012, 09:07 PM brant also the injector leads (broken wire on the plug i... Mar 20 2012, 09:12 PM |
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