Newbie Tech Section Often asked technical questions can be asked here
Sponsored by:
Sponsored by: CARiD

Engine won't continue to run

Thread Tools
 
Search this Thread
 
Old Jul 14, 2018 | 05:34 PM
  #121  
akwheeler's Avatar
Registered User
10 Year Member
Liked
 
Joined: Apr 2016
Posts: 1,583
Likes: 291
From: Alaska
Originally Posted by zerokelvin
So I've got the fuel pump situation figured out. I thought mine was operating incorrectly, I was wrong. Initially it would turn on when the key was in the ON/RUN position and continuously run (I was told it was NOT supposed to do that). I replaced the fuel pressure regulator which was bad (the diaphragm failed) and sending basically all the fuel in the rail back to the fuel tank. After I replaced this part the fuel pump came on in the ON/RUN position ONLY to pressurize the system. After that it does not come on, so I thought it was broke... it's not. It's operating as intended. Checked voltage in the ON position and it reads 0V. When I start cranking, it's reading 11.4V. I could run a wire and a switch but it's working correctly so no need. Tested my original AFM today correctly, I did it wrong the first time.... I'm new to DMM's. It's bad 100%, failing many tests. The new AFM I have tests correctly across the board so we're good there. I sprayed brake cleaner in the plenum and it started then died when I returned the key to the ON/RUN position. Going to trace back the ignition switch wires till I find the problem. I don't understand why it won't start. It has fuel, it has spark, intake is getting air (verified by vacuum lines and observing AFK door pushing in). Still seems something with all the safety equipment/wiring is preventing it from running.
Originally Posted by akwheeler
there are two ignition contacts on your key switch, one when you are cranking and one when you let off and leave it in run. Most vehicles have two separate ignition circuits also so even if you are still getting spark the fuel injectors are probably fired by a different ignition circuit if I remember right. the wiring diagram is your friend.
Oh, and don't use brake clean, they make starting fluid too.
Originally Posted by zerokelvin
Brake cleaner is actually better than starting fluid. Starter fluid vaporizes almost immediately and is used best in "cold" conditions to help start an engine. Brake cleaner will pool and vaporize slower, which will mimic correct fuel air mixture and burn better and for a longer duration. This information came from an expert engine builder/mechanic/tuner.
Originally Posted by akwheeler
Your truck, your expert, your sensors, your cat, your call. I'll stick to starting fluid, I never needed a "pool" of fluid to tell me if I have spark or not or even to get a stubborn motor running.
I wouldn't bring this up with the engine builder if I were you. Even though it sound like your stuck valves were an issue before you tried brake cleaner.
Reply
Old Jul 14, 2018 | 07:41 PM
  #122  
zerokelvin's Avatar
Thread Starter
Registered User
 
Joined: Mar 2012
Posts: 182
Likes: 0
From: South Carolina
For sure... Plus Todd, Ted do great work AND it's ONLY the 22RE head, valves and camshaft... so for them to screw up the valve guides when they only work with ONE KIND would be ridiculous. On Monday I'll see the head and will watch him take it apart and check a few things. Those valve springs are 100lbs of pressure.. you could put marshmallows in the guides and it's STILL push them through. I'm not sure about the tolerances, but is it possible to over-adjust the valves so far that they would in fact come in contact with the piston? I didn't think you could get the piston to touch the valve... but if that happened.. it could have bent valves and THAT'S why they are now "sticking". Anyhow, we'll see on Monday. An yeah, this has been great working with everyone on yotatech... I've learned a ton in a fairly short amount of time.
Reply
Old Jul 19, 2018 | 04:51 AM
  #123  
zerokelvin's Avatar
Thread Starter
Registered User
 
Joined: Mar 2012
Posts: 182
Likes: 0
From: South Carolina
UPDATE: So we figured out that the valves were stuck or having issues, producing very low compression which kept the engine from running. Now we know why... I have never heard of this and didn't even know it could happen but here's the end result... WARNING, this is really messed up.

After I took the engine and transmission out to rebuild and got them to the shops, I started to work on the rest of the truck. I took the gas tank off, emptied all the fuel, put plastic over the holes and rubber banded them on there. The tank sat empty for months and months while I worked on all the other stuff I did to the truck. Turns out that your gas tank builds up "stuff" over it's life which sits in the bottom of the tank. Very rarely do people run a vehicle out of gas, so this stuff in the tank stays relatively undisturbed. By me emptying the tank, it allowed this crap to DRY OUT. Furthermore, when it's warm during the day the air in the tank would expand and in the evening/night when it's cooler, new air would circulate into the tank. This happened daily for nearly a year. It's fairly humid here in the south so this brought moisture into the tank as well. I had no idea, but the tank was horribly rusting away while it sat in the garage for months. Then came time for the tank to go back on... so I start cleaning the outside, moving it all around and further disturbing all this crap in the tank. When I put it back on and got the truck all back together I added ONE GALLON of fresh gas, thinking I can just drive to the gas station and fill up after I get it started. Apparently the fuel pump was able to suck up this new soup that was created in the tank, get past the fuel filter, injectors, etc and dump this crap right into the engine. We took the head off on Tuesday and it was a horror show. Engine has to be rebuilt.... So I guess I'm buying a brand new gas tank, lines, fuel pump, etc and have to pay someone to rebuild it again. Hopefully this information will help someone down the road as to what NOT to do. If I knew this would happen I would have just bought a new gas tank. I had no idea they are only about 100-150 bucks... what a waste of time and money. Gonna be a while before it's all cleaned out and ready for another first start. Super pissed.
Reply
Old Jul 19, 2018 | 05:15 AM
  #124  
gsp4life's Avatar
Registered User
 
Joined: Feb 2015
Posts: 858
Likes: 13
From: Mogadore, Ohio
Wow, that is bad. Guess I shouldn't have blamed the machinist or assembler. I just knew engnbldr wouldn't send out an untested head with stuck valves. Ted has mentioned on forums a few years back that his son, Tod was getting so good that less than 1% of his porting and valve angle-cutting work was out of spec. And he knew that cause they measure and test it.

I pulled my tank once for a couple days to repair the fuel gauge sender, but maybe next time it's out I'll replace it and blow out the lines. Thanks for the graphic warning.

If it makes you feel any better, 5 days ago I got robbed of about $6000 worth of camping gear and tools in Ecuador. I'd love to be out 1-2 grand in machine work instead, can we trade problems? I have a PayPal account so I'll let you mull it over ;-)
Reply
Old Jul 19, 2018 | 06:26 AM
  #125  
zerokelvin's Avatar
Thread Starter
Registered User
 
Joined: Mar 2012
Posts: 182
Likes: 0
From: South Carolina
That sucks you got robbed, humans are awesome right? Took all your stuff while you were away or something... or robbed at gun point/knife point.. something like that? Well all I can do now is pay for the rebuild and move on. Sometimes lessons cost money and sometimes they are hard, I got both on this one. And you're right, I shouldn't go pointing fingers until I have the problem figured out. I just look up information on brand new parts and it says one thing, so I assume it must be that.... wrong. I'll ease off the gas next time until I have all the info lol. Just super frustrated with this whole thing. I guess in the end I've learned that there's a lot of ˟˟˟˟ that goes into mechanics and engine building and I don't have it all figured out yet. Pretty scary thinking that the majority of people out there will NEVER know about any of this, let alone work on their own vehicles. I'll post an update with some pics tomorrow night after we get the engine pulled apart and assess any damage to the cylinders and pistons. Think I should have the injectors cleaned and re-tested after all that crap went through them?... Buy new/refurbished ones? Thanks for the input.
Reply
Old Jul 19, 2018 | 10:59 AM
  #126  
gsp4life's Avatar
Registered User
 
Joined: Feb 2015
Posts: 858
Likes: 13
From: Mogadore, Ohio
Unfortunately, I think you should replace the fuel filter, have the injectors cleaned and blow out all fuel lines and the fuel rail with something like berryman's b-12 chemtool and then compressed air. Better safe than to have it happen again after the new tank and head overhaul. Maybe there's no damage in the bottom end at all, you'll find out soon enough.

If you want a story, I got robbed camping with my girlfriend while we were sleeping in our tent up on a mountain near illiniza, on our way to isinliví. It was so windy up there I didn't hear a thing and I'm a light sleeper. We decided to take a break from all of life's troubles and just got us some badass mountain bikes to try and complete the TEMBR (trans-ecuador mountain bike route). A friendly local at our hostel told us that lots of the route was through very poor, remote areas and the people there will steal from rich gringos if you give the opportunity. In his opinion we were lucky to not have been kidnapped or brought to an ATM at gun or knifepoint.

So we got to keep our camping gear, passports, credit cards, cash and most importantly our lives. We'll live just fine without the tricked-out bikes, spare parts and tools. It's a backpacking-type trip now and we're headed to the Amazon, so we still have it good compared to the guys that robbed us. Those jerks are probably having a blast learning about 3" wide, tubless tires with puncture-proof sealant, 11 speed rear cassettes and long-travel suspension forks.

Well, onward to the Amazons and I look forward to seeing all what happened in your engine and then eventually getting it up and running. Good luck!
Reply
Old Jul 19, 2018 | 11:44 AM
  #127  
zerokelvin's Avatar
Thread Starter
Registered User
 
Joined: Mar 2012
Posts: 182
Likes: 0
From: South Carolina
Glad no one was harmed. 3rd world countries can be dangerous. Have fun on the trip and watch out for humans... they're everywhere!

I'll be posting updates as I progress and when it's done I think I'm going to do a build thread. I learned a whole lot and have a bunch to share and even some ideas for NEW items/fabricated parts/etc. that would work so much better than when you can buy today. When it's done I'll post the link at the end of this thread. Be safe brother
Reply
Old Sep 11, 2018 | 01:13 PM
  #128  
rubronthroad's Avatar
Registered User
10 Year Member
Liked
 
Joined: May 2011
Posts: 312
Likes: 7
From: Hawaii
Glad you got her running, thanks for sharing
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
pius222
95.5-2004 Tacomas & 96-2002 4Runners
3
Aug 30, 2009 08:14 AM
ShortyzKustomz
86-95 Trucks & 4Runners
6
Mar 24, 2007 07:18 PM
88-4RUNA
95.5-2004 Tacomas & 96-2002 4Runners
11
Dec 3, 2004 10:01 PM
EnolaGaia
95.5-2004 Tacomas & 96-2002 4Runners
2
Feb 13, 2004 02:23 PM




All times are GMT -8. The time now is 07:05 PM.