Question about 1996 Chevrolet K1500
Check your spark plug placement on cap. cranking more than normal as in my case I changed fuel filter but in the end I had to change my fuel pump. Check pressure..if possible,,
Posted on Mar 13, 2011
OK you have couple of issues the P1345 is due to lack of agreement between the crank position sensor and the cam position sensor signals to the ECU (engine control unit) . The cause for this are due to two possible reasons 1) the cranks sensor, its connection or wiring back to the ECU is faulty 2) the cam sensor, its connection or wiring back to the ECU is faulty. Note that in this case the cam sensor is on the distributor shaft beneath the rotor assembly. If the rotor assembly has been moved then the timing will have to be redone. It is this code that is causing the miss fire.
The p0441 is a fault with the EVAP system. First check that the fuel cap is on tight as the EVAP as part of its diagnostic test is to pressurise the fuel system and if the cap is loose this can trigger an error. Secondly locate the EVAP purge valve (this opens when engine is above idle speed to allow gas vapor stored in the carbon trap to be released into the inlet plenum for burning). Check that this valve clicks open when the engine is running at 3,000 rpm. If you suspect that the valve is not opening, or worse that it has stuck open then follow the vacuum line that connects to it back to the inlet manifold. Disconnect it and block off the EVAP line and the spigot to which it was attached; the cut off fingers of a washing up glove held tightly on with an elastic band is good method. If the valve has been stuck open then air will have been drawn in from the EVAP system at idling and this will have led to rough idling; blocking it off temporarily as suggested will cause the idling to improve. The failure of the emission test is likely to be the EVAP code p0441 as the EVAP system is designed to prevent the emission of fuel vapor into the environment.
Posted on Mar 14, 2011
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Posted on Jan 02, 2017
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