fuel problem or ign. problem?

[hodag]

1999 4Runner, 3.4, 88K miles. I have a flat spot just above idle. Drives OK, just have to give it a liitle more throttle on takeoff. I just changed plugs, wires, air filter, fuel filter, PCV. Problem better but still present. Thinking either bad coil or bad injector.
I know someone will ask what did the plugs look like. 4 were ok, 2 a little wet. Problem is they fell off the tray, and I dont know from which cylinders.
Could I check each coil for resistance or something? Basically, I'd like to figure this out w/o throwing any more $$$$ at it.
Thanks in advance for any help. Hodag

 

[toybox]

Dude, you posted this in three places.:50cal:

 

[hodag]

Are you gonna help or just criticize?

Look, Im new here. I dont know which area to post. Id like to be able to have the most readers read my question, so I posted in different sections. I use IH8MUD for all my Landcruiser questions, and usually no one breaks my chops for posting in a couple diiferent sections. If you dont want to help, move along. If you do want to help I will appreciate it wholeheartedly. Hodag

 

[dcampen]

This _is_ help.

I use IH8MUD for all my Landcruiser questions, and usually no one breaks my chops for posting in a couple diiferent sections.

Well, that place is an exception then. Crossposting is looked down on most everywhere else.

 

[toybox]

Move along???? I don't think so.

Most people I assume use the new posts button when they enter this forum so all new posts from all sections will show up. So you don't need to post all over the place.

As far as help, It wouldn't hurt to clean the injectors with Techron or BG44 (or something like that). supposedly it does make a difference.

What kind of plugs and wires did you use? Were they gapped correctly? All the wires on tight? Did you replace the dist. cap?

 

[TSP-MIKE]

Are you using an aftermarket airfilter like a K&N?

Try Cleaning your MAF sensor with brake cleaner. It's probably dirty and misreading. You just take the 2 screws off the MAF and only use brake cleaner and spray inside the sensor and reinstall it. It should run fine!

Hope this helps Mike

 

[aj884runner]

Hesitation?

Another area to look at is the TPS (Throttle Posistion Sensor). It may have a dead spot just off idle and sending false signal to the computer without setting any codes. A simple test with an Ohm meter should find the problem if it exsits. The TPS is basically a variable resistor and can wear out over time. Just probe the right wires and work the throttle slowly. There should be a gradual change in the resistance.

 

[20034RunnerV84x2]

3rd gens 4Runner's don't use dist's.