P307 resolved?

[ericshup]

Hey guys,

Here's my story. I've been chasing a misfire on cylinder 7 for more than a year. I've changed the spider, rotor, cap, wires, and the fuel pump is about 18 months old.

While removing the plug on #7 this evening, my wrench hit the steering column and almost set off the car alarm. When I reconnected the wire to the new plug, the alarm chirped again.

I traced the black wire for the alarm that runs thru the column boot, and took out the slack. As soon as I pull out of the driveway, I notice the truck runs like a champ.

WTF OVER?

Does this have something to do with the alarm wiring causing misfires I read on here somewhere?

I can't wait for the drive to work tomorrow and see if it's really fixed.....

Eric

 

[SunlitComet]

How are you setting off the alarm when you got the hood up and you are wrenching on the engine? The alarm with misfires was related to bad releys in the alarm modules themselve in aftermarket units. They were effecting the power supply lines to the pcm and engine electrical components such as sensors and ignition parts because they are spliced in to allow ignition and starter kill.

 

[ericshup]

The flashing light/button broke this summer, so after closing the doors, it arms after 1 minute. It's a big pain in the ass.

When I was removing plug 7, my socket driver hit the steering shaft the alarm chirped. That shit is loud when your head is right by the damn speaker. It did it again when I hooked the plug wire back up.

As far as I know the alarm is stock. I bought the truck in 2011 and nothing looks aftermarket under the hood or in the cab.

 

[SunlitComet]

Well if it is chirping it is likely aftermarket because I don't think factory stuff used sirens just the horn and lights and the horns were in front on the radiator support grill.

 

[ericshup]

Good to know.

Thanks Sunlit