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AutoTech08, Workshop owner
Category: Honda
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Experience:  Diploma in Automotive Engineering, 30 years working experience.
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1998 honda accord lx 4 liter v tech check codes p1399 car

Resolved Question:

1998 honda accord lx 4 liter v tech check codes p1399 car runs smooth while ilding but soon as i drive it it drives like it is missing aslo says cylinder 1 misfire
Submitted: 7 years ago.
Category: Honda
Expert:  AutoTech08 replied 7 years ago.

Hi there,


P1399 = ramdom misfire detected.


Items to check are :

1. Ignition coil.

2. spark plugs and wires.

3. distributor cap and rotor.

4. Fuel injectors, pressure and filter.




Customer: replied 7 years ago.
question what do that code p1399 means
Expert:  AutoTech08 replied 7 years ago.


P1399 is a temporary DTC for random misfires and is equivalent to P0300. It would become P0301, 0302, 0303 and 0304, which are specific misfires for the respective cylinders.





Customer: replied 7 years ago.
ok got top off a lot of carbon deposit
Expert:  AutoTech08 replied 7 years ago.

Lots of carbon deposits means inefficient combustion and that could be due to poor or missing sparks.


It could be due to weak ignition coil, bad plug wires or distributor rotor or cap.


Customer: replied 7 years ago.
clean it still the same check codes random cylinder misfire change distributor cap and rotor where os coil inside cap
Expert:  AutoTech08 replied 7 years ago.

Pull out a spark plug wire and attach a spark plug to it. Crank the engine and watch the sparks, they should be bright blue. If it is dull orange, the coil is weak.


Get the spark plug wires checked. There should be continuity with resistance less than 25k ohms.


Were the spark plugs replaced?



Customer: replied 7 years ago.
Expert:  AutoTech08 replied 7 years ago.
Too much carbon deposits ( sooty ) on spark plugs could mean they are shorted. BAsically for P1399, the firdt thing to suspect would be the spark plugs. Get them replaced and recheck.
Customer: replied 7 years ago.
yes they r sooty black i pull a wire and put a spark plug in end and has orange spark
Expert:  AutoTech08 replied 7 years ago.

Guess the ignition coil is due for replacement.


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