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Why is my 3rd piston misfiring on my 1985 toyota pickup EFI?

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Old 25 May 2011, 03:24 pm   #1 (permalink)
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Default Why is my 3rd piston misfiring on my 1985 toyota pickup EFI?
At the ending of april my engine was stating to run rough. I found that i blew my head gaskit and thought that i had lack of compression. I tore apart my engine replaced head gaskit and front crank seal. When all was done i got the timing on and started it up but it was still misfiring in the third piston. i went through the three main tests... Compression, Spark, and Fuel. My third spark plug was firing. My compression is good, and my fuel injectors and wiring to the fuel injectors are working to spec. I really am stumped on what it could be. If there is anyone that has an idea of what it could be please help.
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Old 25 May 2011, 03:39 pm   #2 (permalink)
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check your distributor sounds like the spark is jumping
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Old 25 May 2011, 03:54 pm   #3 (permalink)
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i agree. missing on #3. compression/plug/spark/fuel all good? it has to be cap or wire to the plug. that's all that's left. arcing?































did it blink at you?































trouble shooting efi misses can be found here on page 164,















http://www.ncttora.com/fsm/1985/1985FSM_OCR.pdf































that's the entire FREE factory shop manual for your truck.































owner 93 & 88 toy pu 4x4s.
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Old 25 May 2011, 04:24 pm   #4 (permalink)
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Check valve adjustment, and look for vacuum leaks.
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