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Fuel Pressure check is a good place to start on K-Jet problems 200 1980

uid 18083's pic
posted by  lucid on  Tue Oct 26 01:50 CST 2010
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last visit: Fri Oct 24 12:31 CST 2014
[RELATED]

"I connected the return line(which was found plugged with a bolt and hose clamp),"

That plugged return line (what were they thinking?) caused fuel pressures to go sky high. So the airflow plate was effectively "locked" down by the high pressure on the control plunger -- and thus no fuel to the injectors.

I guess my reply in your Oct 10th post HERE was too long to catch your full attention, but I suggested something that might have pointed you to this problem saying: "(b)...upward resistance would be felt immediately, with no plate movement possible at all. Full System pressure on the plunger will lock it down solid."

I only bring this up now in the hope that you or any readers planning to maintain a K-jet car will consider a Fuel Pressure test as "Step 1" in trouble-shooting. Although this does require a special gauge setup with two connecting hoses and a valve to select between them, the K-Jet (aka CIS) gauge can be found at a good price at J C Whitney.***

***EDIT: Sorry, it looks like JCW doesn't have that gauge any more. They may be getting scarce now. Try eBay for K-Jet or CIS Fuel Pressure Gauge.


--
Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.






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