Thread: Changed Spark Plugs, Now I have codes. Please help

I changed spark plugs last night. On the way to work this morning, it ran like crap after it warmed up. Crappy MPG too.

Codes are:

P0300 (multiple misfire)
P0131 (O2 Sensor Bank 1 sensor 1
P0137 (circuit condition O2 Sensor bank 1 sensor 2)
P0171 (fuel trim bank one condition)

I pulled the engine forward to get to the rear plugs. Is there something that is commonly disconnected whild doing this. I've check all the vacuum lines around the s/c and all seem okay.

Any Ideas?

Bad o2...vacuum leak...random misfire...did you blow it up?

Originally Posted by blueguy91

Bad o2...vacuum leak...random misfire...did you blow it up?

LOL nope... Oil looks good. Coolant still full. No engine noises. After it warms up it starts acting like it's running out of fuel.

Did you click the wires on all the way? Did you do them one at a time or all at once? You may have crossed a few wires.

It goes on the coils...top to bottom...

6
3
2
5
4
1

and if you're standing in front of the motor...

2 4 6
Blower
1 3 5

Originally Posted by dsmuts

Did you click the wires on all the way? Did you do them one at a time or all at once? You may have crossed a few wires.

I did them one at a time. It runs great until it gets warm. NO misses at cold idle.

Originally Posted by blueguy91

It goes on the coils...top to bottom...

6
3
2
5
4
1

and if you're standing in front of the motor...

2 4 6
Blower
1 3 5

Thank You! very helpful guys.

I'm thinking maybe I pulled the vacuum line off of the EVAP canister when I rolled the motor forward...

Whelp, that'd probably do it.



That's for a Bonne' but it's close enough minus our EVAP goes towards the back at the firewall.

I'm about to go out and look. I'll update when I find out!

Thanks all!

Found nothing disconnected. It has ran flawless for 30 miles now.

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Did you buy crappy plugs?

AutoLite 606 copper cores

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Did you gap them?

And if you did what did you gap them too?

Yes. .060"

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Fuel pump was bad. It totally stopped running on me. New pump, all good. Going to do the fuel filter tomorrow. Ohm the injectors and do a compression check just to be sure nothing else is going on.
Thanks for all the help!

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Well that's random.

Glad you got it fixed though.

Run some seafoam through that b1tch next

Car has been running good for a couple days now. I have a P0650 code (SES light) I'm assuming someone removed the bulb. Any tips on going in and replacing this?

I did the lim gasket on a girls malibu once and it would randomly not start. Fuel pump went bad sometime while i was working on it apparently. Quite random but easily fixable.