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new rebuilt engine good spark to all cylinders but only
Sent to Car Experts December 30 07:10 AM

New rebuilt engine. Good spark to all cylinders but only getting fuel to back 4 cylinders not front ones. Why?

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Pre-1980 Dodge D100 400

Customer (name blocked for privacy)
Status:  Closed   Value: $8
Info Request
December 30 7:18 AM (7 minutes and 45 seconds later)
         
REPLIED to Info RequestCheck Mark
Could you go into a little more detail as to the whole story behing changing the engine and how completely assembled it was.Also please explain why you think the back 4 cylinders are getting fuel and the front 4 are not.Did you replace the cap,rotor wires and plugs during the engine replacement?What parts did you have to swap from your old engine.Is it new or used?

Master ASE Certified.L1 Advanced Engine Performance Certified.Pa Emission Repair Technician.Just Answer Car Category Mentor.
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Davo -- Master technician -- 99% Positive Feedback on 1931 Car Accepts
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December 30 7:42 AM (24 minutes and 56 seconds later)
         
Reply to Davo/diablo666's Post: I completely rebuilt it myself.All new except pistons.Intake,carb.,dist.,coil are off a running engine.I checked spark to all plugs,checked fuel,and checked all points concerning timing.The only problem I could find was 5,6,7,8 cylinders are flooding with no sign of fuel to 1,2,3,4 cylinders.No adjustments made to the parts I swapped.
Customer (name blocked for privacy)
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December 30 4:45 PM (9 hours and 2 minutes and 11 seconds later)
         
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Davo -- Master technician -- 99% Positive Feedback on 1931 Car Accepts
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January 5 6:12 PM (6 days and 1 hour later)
         
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Customer (name blocked for privacy)
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January 5 6:16 PM (3 minutes and 54 seconds later)
         
Yes all parts are from same motor.The years are different.One is 77 one s 76.
Customer (name blocked for privacy)
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January 5 6:27 PM (11 minutes and 37 seconds later)
         
ACCEPTEDCheck Mark
I would suggest you replace the spark plugs and see if it will start with a shot of starting fluid.The design of a carb and intake pretty much makes it so the symtom you decribe can't happen.One side of the carb feeds the two end cylinders on that side and the two middle cylinders on the nother side of the engine.That means if the rear cylinders are getting fuel the front ones should be also unless you assembled something incorrectly in the intake,valves or cylinder heads.That or you have some type of part mismatch.

Master ASE Certified.L1 Advanced Engine Performance Certified.Pa Emission Repair Technician.Just Answer Car Category Mentor.
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Davo -- Master technician -- 99% Positive Feedback on 1931 Car Accepts
ASE Master Technician/Advanced Automotive Diagnostic Technician
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