1999 Honda Cr-V is burning raw gas, and a cylinder is not firing. Any ideas on what the problem could be?
I recently purchased a 1999 Honda CR-V for a low price due to a miss in the engine. After replacing spark plugs, wires, Distributor Cap/roter, and ignition coil, the problem continues. I had suspected the fuel injector was bad, but the CR-V is made is such a way that checking the injectors is harder than it should be. Giving codes P1399, and PO304. This is because cylinder 4 is not firing at all. Pulling plug wires while the engine idles shows that pulling cylinder 4 has no change. Swapped park plugs and wires with a different cylinder and they work fine. Raw gas and black residue on exhaust pipe. Has a hard time when starting up, but once the engine warms up it runs perfectly. Shuts off when put into reverse before engine is warmed up, RPM too low.
Sdsd
No it isn't. Raw gas doesn't burn.
My concern at this point, given that it had the misfire when you bought it, is loss of compression. A compression check, at least of cylinder 4, is in order.
In a first generation (1997-2001) CR-V without known maintenance the top concern is that the valves were never adjusted. The valves must be adjusted - not just checked - every 30K miles to avoid the vanishing clearance problem (see the first source) and the burned valves that result.
This is one of those cases where make, model, and year are critical information… Good on you for supplying them up front!
Stop guessing. Get a spark tester and check if all the plugs are firing. Get a noid light and check if all the injectors are getting command to fire. Listen to the injectors with a big screwdriver or stethoscope and check if the injectors are pulsing when the engine is running. Get a fuel pressure tester and test for fuel pressure. Test the fuel pressure regulator if it is leaking (pull the vacuum line) or responding to change in vacuum. Disconnect the vacuum lines at the EGR valve and PCV valve and try running the engine with the lines plugged. Check for compression on all the cylinders. Check ignition timing. Get an old school vacuum gauge and check vacuum. Remove the timing belt cover and check the crankshaft and camshaft settings.
If you have not found a defective part or cause at this point, it is time to see a mechanic with a scanner.
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