p0302 misfire coilpack error help

[mista_khan]

Hi

 

ive been having the p0302 error for a few weeks now, its for the second coil pack, ordered a brand new one on eBay, replaced it over, the code still came on, swapped 3 coil packs around in the engine, the error is still coming up as p0302 , any ideas why the error hasn't gone away yet?. what else could it be?

[steve2006]

Pretty obvious but is the spark plug good? Other possibilities are the connecting plug or wiring to the plug and loss of trigger pulses from the ECU.

Did you reset the ECU to remove the stored codes after changing the pack?

[ColinBarber]

Lexus suggest the following as possible cause (in order of likelihood)

• Open or short in engine wire harness
• Connector connection
• Vacuum hose connection
• Ignition system
• Injector
• Fuel pressure
• Mass air flow meter
• Engine coolant temperature sensor
• Compression pressure
• Valve clearance
• Valve timing
• PCV hose connection
• PCV hose
• ECM 

[mista_khan]

43 minutes ago, steve2006 said:

Pretty obvious but is the spark plug good? Other possibilities are the connecting plug or wiring to the plug and loss of trigger pulses from the ECU.

Did you reset the ECU to remove the stored codes after changing the pack?

 

Hi i used the code reader to read and remove codes , i have the platinum plugs installed for around 2 years, barely covered 20k miles , just to confirm number 2 is the second one from the front side of the radiator right?

[ColinBarber]

Correct.

If you think it could be a plug then just swap it with another to see if the fault moves.

[mista_khan]

will try this If the code comes up again, will keep you updated :)

[mista_khan]

right

 

ive swapped the coil packs and spark plugs in 2 cylinders, p0302 is still lighting up followed by p0303 and p0300 , whats next lol ?