Topic: 90 toy 4Runner 4X4 3.0 HELP

[ALCORN]

 Hey Guys got 90 4Runner 3.0 v6 auto motor was complety rebuild having trouble with. Timing is dead on.When in park it running awsome,but when u put in drive it has no power and falls on it faces it like i have the brakes on.  HELP PLEASE.. 

[79coyotefrg]

blackdog  is the 3.0  guru

[ALCORN [OP]]

Hey Glen how u get hold of Blackdog?The guy i got it from had all kinds of work done to the motor.I think he spent way to much money on this type of motor.He had forged piston 10 to 1 compression, port and polished heads,and oversize throttle body 3mm over by downey,also oversize injectors also downey and downey headers and downey cold air intake and manaflow exhaust and high flow cat and the list goes on.It has only 1,050 miles on the rebuilt. I have all the recipts the guys spent over $6,000 just for motor and the rest of the stuff i mentioned.

[BLACKDOG]

Sounds like a tranny problem to me, which I don't know much about.  I've got a 5 speed.

What exactly is it doing?  Bogging down, or does the truck just drag like it doesn't want to go anywhere?  Does it stay running or die?

When you put it in D, and let go of the brake, does it stay put, or does the tranny start moving it forward? 


IF you can drive it, does it clear up at higher RPMs?

[yotaweelr]

sounds like the tcc solenoid is stuck on.

[ALCORN [OP]]

I replaced the tcc soleniod that's not what it is.It not in the trans it just doesn't have anying power. Put it to the floor top speed 40 mph.

[91 super yoda]

do you notice any black smoke, is the ignition system upgraded to keep up with the other upgraded parts? it sounds like it might be flooding itself out when you get on the gas.

[ALCORN [OP]]

It has aftermarket plug wire by JACOBS change the plugs also i beleave it running rich put no smoke.what r u suppose to do to igination system?Change out the distrutor with a new rebuilt didn't change anything.

[old school toy]

plug cat???

[91 super yoda]

you coud throw in a hotter coil to create more spark to help with the running rich. wires and plugs only transfer as much spark as the coil can throw at them.

[kneedownnate]

plug cat???

Quick way to find out is start the truck cold, take off immediatly and see if it gradually loses power as it warms up.  They didn't accidentally leave a rag in the intake or anything did they?

[ALCORN [OP]]

No rags in intake,and plugs r new r gap correct,also cat is new high flow one.

[ALCORN [OP]]

HELP WHERE MARLIN?

[BLACKDOG]

do you notice any black smoke, is the ignition system upgraded to keep up with the other upgraded parts? it sounds like it might be flooding itself out when you get on the gas.

rev it up, and check for a gas smell,  if its running rich, you should smell it.

[ALCORN [OP]]

Blackdog i do smell gas smell how u fix the rich fuel mixture or lean it out a little? thanks for ur help.

[Opias]

check the mass airflow sensor...mine went out and it was behaving similarly

[k5kell]

Have you checked what the computer had to say?
-Kell-

[ALCORN [OP]]

It's not throwing anying codes that's what is strange.But the guy i got it from had the o2 senors unplug i plug it in did notice anying diffrents but it plug in.Blackdog how many o2 senors do u have on ur 3.0 v6? I have just the one in front of the cat.I notice also that the cold intake tube that goes to the K & N filter has gas in it not alot just a few drops and it smell rich.Is the mass air  sensors the sensors that's by the air filter?

[ALCORN [OP]]

HELP!!!!!!!!!

[Marlin]

Stand back and take a deep breath.
Are all the ground wires connected to clean surfaces?

Plugged fuel filter?
Tight valves?
It also sounds like the cam shaft(s) could be one tooth off?

You need to start with the basics and check them off one by one.
Check each plug connection to find out if a wire has slipped out of the plug so as not to be making a good connection.
Do you know of another 89 V6 that you could test your parts on like the air box ect.

I recall finding a bad connection at the water temp sender for the computer located at the back of the engine that was telling the computer that the engine was running super hot so it was shutting the system down with out setting a code.

Marlin

[BLACKDOG]

yeah, just one O2 sensor.

[ALCORN [OP]]

IF the o2 sensor was bad it would still run bad in park?Got real gas smell.The kid i got it from had the o2 sensor unplug he said they told him he didn't need it hook up. That the way I got it that way i plug it back in and it made no diffrent.It should have made a diffrents in way it ran with it plug in and with it not but how would it act?

[BLACKDOG]

IF the o2 sensor was bad it would still run bad in park?Got real gas smell.The kid i got it from had the o2 sensor unplug he said they told him he didn't need it hook up. That the way I got it that way i plug it back in and it made no diffrent.It should have made a diffrents in way it ran with it plug in and with it not but how would it act?

you should have the O2 sensor plugged in
However, not having it plugged in would also affect the truck's running in idle as well as under power. 

do you notice any black smoke, is the ignition system upgraded to keep up with the other upgraded parts? it sounds like it might be flooding itself out when you get on the gas.

Still think this is the problem.  Check the timing, and lean it out if necessary  

[ALCORN [OP]]

HOW DO U LEAN OUT A EFI MOTOR? TIMING IS ON 10 DEGREES LIKE IT SAID TO.RUN GOOD AND STARTS GOOD JUST WHEN U PUT IT IN DRIVE IT FALLS ON IT'S FACE.COULD I HAVE A BAD O2 SENSOR?

[Chris123]

  Hey i have a similar problem with my 4Runner.  Durring idle it runs fine and reves great and when i try to go it will try to sputter and like you said, fall on its face.  I took it to the dealer and we found a the ground wire on the battery was not getting a good connection.  When he tested the volts on the bat. it was in the 17-19 range but when we cleaned and reconected it, the voltage was back down to 13.9 where it should be.  I found that because it was a stick i could while driving, turn the key to the off position, wait a sec, then turn it back to on(still in gear) and my acceleration problem was fixed tell i shut it off again.  Like someone else said earlier about the temp sensor, i do knowtice it bouncing around some times and that might be the probem now but haven't got the chance to check that yet.

[SnailMan]

also im not sure if its the ame with the 3.0 but theres a small screw like thing on top of the throtle body if its not there i wont run right cause it controls your air fuel mixture. on my old 91 p/u it was all the way out and it was runnin way to rich. look for this screw if its missing call a junk yard they will probubly give it to you. if its there try to unscrew it a little bit that should work. but most importantly calm down. wen you get upset and frustrated you dontthink streight and you mess up on things hell it could be somehting as simeple as a bad ground like
chris said ie had that happen before as well. check the conection wires on the starter cause if one is bad the truck wont run right. good luck in figureing this out man.

[ALCORN [OP]]

Thanks guys

[ALCORN [OP]]

Sold the motor and trans t-case out of the 4runner.I bought a 92 22re motor and a w56 trans and going to put in the runner and going to sas front with marlin's 5' sas kit.Got a lot work to do swap the 4cyc wiring harness out a wreck runner i bought.

[toyrokcrwlr]

I had that same problem years ago and come to find out the air hose from the box to the throttle body, the one closest to the throttle body was dry rotted and cracked open inside the grooves, it opens up when you actually take off because the motor torques. Causing it to take in too much air