pat24

so here is the deal i just received a 1988 4 runner that needed alot of work and i thought i could handle fixing up this old 3.0 but then i realized that it was alot more work than i thought first i thought that it was a bad fuel filer so i went out and got on and put that in and it still wouldn't start so then i decided to try plugs because they looked like the plugs from 88 that where in there still didn't want to turn over it sputters then dies so i decied to start taking it apart i checked the timing the spark on all the wires i riped the air intake manifold of and put stating fluid directly into the pistons still nothing i have no idea what is wrong can any one help me

Chrisnxl185

The valve timing is right but your not sure about the spark timing. Also tell them about the error messages we were getting

Gonzo4Runner

Get the FSM (Toyota manual, not Haynes or Chiltons), and start with the trouble shooting procedures in it. The EFI section will tell you how to read the codes off the ECU.

89silverpu

do you have sufficient compression in all 6 cylinders??

ozziesironmanoffroad

question that i think this guy will benefit from... whats wrong with haynes?

ozziesironmanoffroad

try cleaning your injectors... they may be clogged

Jay351

first.. try pulling any codes. Takes 5 mins and all you need is a paper clip and your computer to decifer the codes.

pat24

i did that it said my ac was messed up which makes sense cuz the belt is gone it said i have a short in the fuel flow sensor and the air intake sensor

GVOLCRunner

Just from numerous experiences working on fuel issues on the 22r/re and 3.0.
it sounds like your Mass air flow sesnor is bad.. why that is causing you to not start is simple.

I had this issue once and took a look at the electirical wiring diagram. The Mass air flow sensor kicks the fuel pump on, something about it makes sure there is enough air....

Anyway, if your sir flow sensor is bad.. then you can check.. and get the truck to start by going to your engine jumper box. Its a little grey box not more that a 1 to 2 inches wide right with your engine relay boxes.

You want to short fp+ to B+...connect the two with a piece of wire. What you have now done is taken the air flow sensor out of the equation and sent power directly from your battery to the fuel pump. It wont hurt your truck... I drove around forever till I could get a mass air flow sensor.. they are hella expensive.

If it dosent then start.. well crap.. more serious issues.

It should only take you like 5 minutes to do this..if its a sluggish start.. maybe a little cold start in there will help it out.

Let me know if you are confused, or need help.

GVOLCRunner

Oh and it sounds exactly like what my 90 3vz v6 did.. I spent a couple days dropping the tank thinking, ok.. fuel pump.. then ok clogged fuel fliter.. then, ok no spark.

Took me forever to figure out.. STUPID MASS AIRFLOW SENSOR. SO, im hoping my wasted time will help you out.

GVOLCRunner

heres a pic from my 90 v6.. its dark.. but should get you in the right location.

GVOLCRunner

ok, wouldnt let me upload it again.. so go here... the pic is inthis forum. similar issue.https://www.yotatech.com/forums/f116...l-help-124572/

04 Rocko Taco

here is GVO's picture. Hope this helps. Yes it does sound like a mass air flow sensor. (Hope you dont mind if I rehosted your pic GVO)

GVOLCRunner

No, thank you. Trucks and tools I know..message boards and how to upload stuff, I do not.

04 Rocko Taco

Well then, your halfway to becoming the Ultimate on YotaTech. lol. You gotta know the trucks, AND the forums. lol.

pat24

thanks guys it is raining today but i am going to try it tomarow and i will tell what happens thanks s much for your help

pat24

so i jump the 2 ports you told me to and the truck almost did start the fuel pump kicked on as in i could hear it but when i turned the truck over it cranked and started to sputter but still didnt not start it started to knock at about 500 rpm but just wouldnt start i know that sensor is bad but i also got another code somthing about the fuel sensor or fuel flow sensor im not sure i will have to get you guys the number later (curently at school) but if you have any other ideas i belive we are geting closer to the problem because the list is geting smaller hahaha but thank you guys so much for your help

pat24

i forgot to tell you what happend when the vehical died the guy i got it from was my friends dads he was driving down the road and he stoped at a light and the truck just stoped running he tryed to start it but it would turn over so i have no clue it ran fine right up to that point he hasnt had a problem with the engine up untill then

pat24

gvo got any other ideas