Hi just changed the plugs in wife,s street triple iridium plugs went in. now the engine malfunction light is on any ideas

if the dealer managed to get the light off after working on the bike , I would be inclined to go back there to see if the problem is connected or if there is another fault putting the light on

Hi there,

Sounds like the engine timing is out - possibly due to incorrect spark plug gaps? If the plug gaps are correct, then there may be an issue with your Knock sensor.

In either case, your vehicle's on-board computer will have stored the appropriate fault codes, so have your codes read by your local Toyota dealership (this takes about 10mins to read your codes).

Once the codes are extracted, this will identify the culprit circuit.

Hope this helps..

code p 0306 is misfire detected no 6 cylinder causes electrics
more likely a bad injector , injector wiring or dirty tip

Please go to this page for engine misfire causes.

I would not spend that kind of money on spark plugs

Just install double platinum

Do not install Bosch with the silly 4 prongs etc
they won't work in some motors

Stay with the OE electrode shape

Spark plugs will make no difference what so ever
as to upgrading to Iridium

jaguar x-type 2ltr diesel 2004 the glow plug warning light flashing, was told dirty fuel on fault code all fuel changed and filters. No problems for 20 miles untill engine was put under power on high revs went into limp mode, warning light glow plug falshing again? any ideas thanks.

Instead of the auto-zone trip , take it to the dealer !

See if your car has an ignition control module. They will go bad over time and cause random engine misfiring. Just went thru it with my 2002 Buick LeSabre. 120,000 miles on the engine. Replaced plugs, plug wires and check the coils. It was the ICM.

misfire only comes from the coil packs.. replace them

i have 2003 trailblazer ltz 153 000 mileage i have code po440 .i changed gas cap and turned off the chech engine light... i made 300 miles and it was good and today morning i drove a mile and light turned on ..... what do i have to fix ...thanks