RIGHT ON, ALAN! Ok, now don't think I'm being a negativista, hahaha, but just be VERY observant with the new ECU. I've heard from a long time Toy-mechanic who has his own shop, ..."Sometimes a new ECU will seem to have fixed everything....but eventually it relearns stuff and can go right back to where it was". Mine has not, after about 4 hours of either idling or driving. However, like you said, ..."it's not going to work out the kinks for us"....so stay on that, otherwise, you could end up slowly burning up valves or your CAT(I know, i know....Georgia, CAT's are cheap compared to here, grrrr, lol).

Anyway, sweet, ...."LET'S KNOCK THIS PUP-PUP" crap the heck outta here!" OK?

Alan, please help me out here, .....Does your truck idle up when cold to about 1100rpm?

 

Alan,

Just wanted to share something. You can read my last post on the troubleshooting thread and, well, you'll be caught up. Not TOO long, lol.

Anyhow, just letting you know that the IACV was bad, for sure. I mean, mine not only didn't idle up, before, but it didn't want to hardly idle at all. Probably because the IACV is supposed to take over at cold start, but when it's not reading or misreading or JUST CRAP, lol, ...it will not bipass back to the Throttle Body and Closed Loop sensors until it's, well, in CLOSED LOOP, lol.

Installed new one(50% off, THANKS *#!@%, LOL), IDLED RIGHT UP TO 1300 at cold start and slowly dropped over 1.5-2 minutes.

Anyhow, wanted to share at least some good news on my end, ....even though I still gotz issues! hahaha.

Just said a lil prayer for the both of us, Alan! lol..... Maybe some day either one of us will be in the others backyard, ....and we can do a "Jump up and raise hands" Youtube Commercial! hahaha.

Best Wishes,

Mark

 

Congrats Mark on fixing another problem. I will write more later, but at the moment I can't remember where the IACV is. I'm thinking it is the same as the auxilary air valve.

I hope to do more to it tonight, but first I have to go pickup a 95 4Runner 4X4 5 speed V6 with only 132K It looks like it has been well taken care of. Maybe the gremlins in my 86 won't infect the 95 LOL.

 

HAHAHAHA, SUREEEEEEE, ....don't you know that Gremlins don't discriminate? I'm guessing you're getting a killer deal on that 95 Fo-Runner, ....COOL! 22re or 3.slow? Now, when you say "Pickup a 4Runner".....does this mean that you're going to chop off the back and turn it into a Tubbed and Doved Trail Rig? loll....jk.

The IACV is also called the AAV, yes. I described what happens and how it can trick you, etc., from the mouth of the Dealership Master Mechanic that I spoke to today for a few minutes.

LORD, ....YOU KNOW WE HATE GREMLINS AND, WELL, THEY'RE EEEEVILLLLL! LOL. SO HELP US KILL THEM.....AMEN! hahaha.

Have a great one, Alan and best wishes on the new find! DANG I'd like to have a couple spare yotas! Grrrrrrrr, ......too broke! lol

 

Yeah, I got a pretty good deal as long as the gremlins stay out of it. I've been looking for a DD for 2-3 months in good shape and low miles. It got listed last night and now it's in my yard tonight.









Sorry if I got sidetracked. LOL

I did start the 86 tonight. It was hard to start. It took 2 tries and once it fired the idle creep up to 800. I didn't let it warm all the way up, but it is still running funny. I need to got back thru and check the timing, TPS, and valves just for a piece of mind. I also need to solder the igniter leads and probably a few other things on the list. Sorry, not much progress. I've been working on other issues (not engine related) as well.

 

DANGGGGG, that thing is CLEAN! lol. Low miles, and 4x4, too? YOU STINKER! hahaha, Jk, I'm really happy for you, Alan....you needed that break, eh?

 

Congratulations, Alan! I'm betting the new ECU will be just fine. IOW, yeah......sometimes if you have an issue and you swap in a new ECU the problem may seem to come back. The ECU has a programmed long term fuel map that is the "basic" or default mode and will run the vehicle on that in the event you have a sensor malfunction that the ECU relies on for it's short term fuel trimming. So, if you're having a sensor issue and not an ECU issue, but you swap in a new ECU, eventually the ECU will try to base it's short term fuel mapping on the "new" data.....new data being your existing sensors and their input.....faulty as they may be. In your case, though, with such major problems you were having from a bad ECU, if you have any other issues, they will be minor in comparison and much easier to track down. Hope that makes sense....haha.

This explains better than I can....

http://www.autoshop101.com/forms/h48.pdf

 

Thanks Mark!! It runs good. I did find a leaking axle seal today.

Thanks Matthew. I'll print that pdf and read it tonight. Yes, it does make some since what you said.

Now I can concentrate on the original problem that started this thread. Here is a link to the rear window fiasco. LOL Y'all probably thought that I had been goofing off. Since I hadn't posted much on the ECU troubleshooting.

 

I'd hope that you would be goofing off. I try as much as I can to do so.

 

Alan said, "Thanks Mark!! It runs good. I did find a leaking axle seal today.".....you sure it wasn't a Gremlin with a runny nose? hahaha. JK, JK, retraction! lol. Yeah, I think they're more likely to leak when you NEVER use them. Did you lock it in and then discover this?

Have a good night, Alan, and a BETTER WEEKEND!

Mark

 

HAHA


No I didn't lock it in today, but I did when I bought it. It wouldn't have matered it's been leaking for a while.



I've been working on the 95 still so I haven't had much time for the 86 ECU but did look at one thing the other day. I looked at this VSV to see where it went to..............it made a loop off of the 3 way valve screwed into the plenum. I hooked the elbow end of the VSV to the FPR like the 89 is hooked up. Not sure if it right. I haven't found a good pic yet of what it should be. Still hard to start has to crank for 5-10 seconds and idle comes up slow.



I unhooked the IACV while running cold and no change. Just trying different things.

 

Your IACV is most likely bad, Alan, if you're having no idle up. I really looked into that, deeply. Removing it and checking it against a working one is the best way to gauge how open it should be when cold.(not ice cold, just cold as it not running all night or something)...but THERE IS a Multi Meter Ohm test for the unit as well. It has helped my running conditions, actually, Alan, as--- On top of bypassing the Throttle Body initially until it comes up to temp a bit, ...it also has a TINY lil hole in the plate, that, when it's closed off(the gate inside), it should still be allowing a small amount of air through for balancing things out(sorry, there's a more technical description of why it's there, and Thook gave me the PDF...just...I'm not on that puter right now, lol).

Also, I would bet dollars to donuts, that VSV, like with mine, should be feeding(when needed) vacuum against the top of the FPR. It causes the plunger inside the FPR to stay in fluctuation(regulating the fuel pressure) when at idle. I believe the VSV is also supposed to stop pulling vacuum when under load, which would force the FPR to stop regulating and instead allow the Fuel Pump to PUMP AWAY unhinged. I know, that's a lame description, but I think it's accurate to a point. Thook can either confirm or slap me, I mean, confirm or deny this claim, hahaha.

Glad you're enjoying the 95!

 

Thanks for the bare bones discription. HAHA I need that I've been printing out the PDF's and reading them. I guess I missed that one. I look later tonight thru the threads to see if I can find it.

I'm sure you are right about the IACV.

Mark, I saw on your thread someone mentioned to check the timing. That was one of the things I needed to do as well. I had time to go check that. With the jumper wire it was 0* I then readjusted it to 5-6* and runs alot better. With the jumper wire out it is reading 12*. It accelerates really nice (parked). It does not back fire thru the intake any more.

That's all for now.

 

DANGGGGGGGG! lol...... "0"???? Yeah, that's a bit retarded, lol. Mine, if anything, is advanced to about 10* or so. It always seemed to run better at around 8* or so, before. I'll definitely be checking the timing ASAP., .....should have already, but I just haven't had much time at once to tinker with it. I've been having to RUN, RUN, RUN, everywhere, lol.

RIGHT ON with the latest news, Alan,....that's great to hear! Is it smoking like a Cheshire Cat? lol.

 

PS> That IACV, if you get an account at the dealer, is about 230$ with tax. I know some might disagree with me, but I would not buy that thing used. You'll just wind up eventually chasing your tail again. It's got a bi-metalic arm in it that wears out, but it APPEARS to be ok, once you clean it all out. Either way, if you're not idling up when cold....that is 99% most likely your problem. I read TONS on that issue and couldn't find really much of anything else mentioned that controls that. Guess that's why they call it the 'IDLE AIR CONTROLLLLLLL VALVE' hahaha.

 

<<<<SLAP!!>>>>......erhm....I mean,"I deny that claim....ehem".

Lol....you don't have it totally correct, but I'll have to comment tomorrow when I have more time.

 

I knew I saw that bugger on your valve cover. It's in one of the pics on the first page of your thread. That's the fuel pressure up VSV, alright. I'll tell you how to hook it up tomorrow.

 

OUCH, what was that? lol.....my cheek is bright red and I didn't see it comin!

Anyway, yeah, I know it was a half-arsed explanation, but that's why the disclaimer....."Thook will confirm or deny"..... Yeah, I've actually ran into 3 people in 1 week who've told me they had to replace that VSV. It wasn't a huge issue, but it DID make a difference. Having constant vacuum(OR NONE, LOL) on the FPR is not ideal, I would imagine, eh?

My Best to ya, guys,

Mark

 

See replies in cheek color....

 

I dont know about yours, but on mine i have i sensor in the location i have circled that has one wire that looks like the one you are trying to figure out.