Changed my plugs with NGKs because of hesitation/crappy acceleration...it was time. Truck started fine no problem took it for a drive to reset everything. Truck bogged and misfired..now its kinda smoothed out a bit, but I am still getting some hesitation. How long does it take for the ECM to reset completely? Is this normal? Truck has 135K and is a 3.4

 

Sounds like possible bad plug wires.

The fastest way to reset the computer is to disconnect the battery (always disconnect the negative lead first, it's safer), wait a few minutes and re-connect.

I assume that the NGKs that you used are dual electrodes?

 

Yes the are the duals...I disconnected when I changed them. How long does it take for it to finish resetting?

I guess it could be the wires...they are original. I hope it is not a coil pack

 

After disconnecting/re-connecting the battery, the computer is reset. It will adjust a little for a while but you won't feel much change. It's only fine tuning it's self.

 

I did not pull the wires off the Coil Packs, just pulled the packs out. I had unplugged the battery...so the ECU will reset...I was just wondering how long it takes for it to map everything..I heard it could take a day. I didn't use any dielectric grease. Maybe I should just replace the wires too since I never have

 

Thanks Gerdo...so its not normal for it to run like crap for a little while? Say 15-30 minutes?

I have a cel...but it was on there before because of the O2 Sensor which also needs replacing

 

I can get an NGK set of wires for $36 from Advance Auto

 

It's not normal for it to run bad for any time.

The O2 sensor could be THE problem. I would replace both O2 sensors and the plug wires. Did you do the "suck the Seafoam in the vacuum line?" Seafoam done this way can KILL O2 sensors.

The NGK wires are the way to go.

 

No I didn't do Seafoam...Can I do a generic/ Bosch O2 sensor or do I need to use the NGK? Price difference is a good 20-30 bucks

 

I change both mine to Bosch ones and have had no problems.

 

Thanks Gerdo I appreciate the assistance.

 

What model/year do you have?

 

What mt goat said and when's the last time you cleaned the MAF?

 

Went to advance auto to pick up the NGK wires...figured I would have the dude check my cel to confirm again what it was...or if there were more...he said there were none..but the cel was on my whole ride there. Brought the wires and went to leave...truck runs like CRAP

I let it sit for a few and started it a couple of times...eventually after wiggling the wires on the coil packs and making sure everything was tight I was able to limp back to the office. This is crazy I should have just taken it to Toyota

 

2000 4Runner 3.4 V6 135K

 

It didn't run like this with the old spark plugs in there...this is crazy

 

First of all...don't use Bosch anything.
I have ALWAYS had bad luck with their products in my vehicles.

Secondly, go back and retrace your steps and make sure there isn't anything you missed when replacing.
I totally missed one plug one time when I was doing it, didn't tighten one all the way, etc...

I didn't finish reading all the posts but did you already replace the wires?
Wouldn't be a bad idea if you can actually get a legit set of NGK wires for $36 locally.

I would also clean the TPS, throttle body and MAF while you're at it - shouldn't take more than 15 minutes for all three.

I'd also run some fuel injector cleaner through it - I recommend using Chevron/Techron.

Just my $.02,

Fink

 

I put in some Lucas...and yes they are NGK wires...the parts guy was surprised too when they came up $36 wanted to go back and get another set because there were only 3 in there...haha I told him it was fine. I will clean all that stuff, I am just surprised this did not happen with the old plugs in there. I know improper gap can cause issue, but these looked fine...I dont have a wire gauge to verify..maybe it is just the wires that would be nice.

 

Are you 100% positive you have the wires routed to the correct plugs?

 

What skid place said.....

You might also want to sweep your sensors and for s and Giggles ohm your old wires just to see if they were an issue to start with.......~1 ohm per inch of wire.