2056 D-jet, running poorly, CHT on #4 is waay off |
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2056 D-jet, running poorly, CHT on #4 is waay off |
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? |
aircooledtechguy |
Mar 15 2012, 09:05 PM
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#2
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The Aircooledtech Guy Group: Members Posts: 1,966 Joined: 8-November 08 From: Anacortes, WA Member No.: 9,730 Region Association: Pacific Northwest |
To check for an intake leak, get the engine idling. Then use a can of carb cleaner with the thin tube attached to the spray head. Spray around EVERY joint, seal and gasket in the entire system from the throttle body to the head where the manifold attaches. If the RPMs momentarily rise as you spray, you have a leak there. If you find a leak, don't stop thinking it's the only one, continue until the whole system has been checked.
Common areas are the plenum to runner seals, small injector seals, cracked vacuum hoses, etc. |
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