Home Menu

Site Navigation


Toyota 4Runner Forum - Largest 4Runner Forum > > > Engine missing real bad now! Ideas need please.
User Tag List

Reply
Page 1 of 2 1 2
 
Thread Tools Rate Thread Display Modes
Old 12-27-2022, 11:08 PM #1
aa010175's Avatar
aa010175 aa010175 is offline
Member
  
Join Date: Nov 2021
Location: San Diego
Posts: 55
Real Name: Dave
aa010175 is on a distinguished road
aa010175 aa010175 is offline
Member
aa010175's Avatar
 
Join Date: Nov 2021
Location: San Diego
Posts: 55
Real Name: Dave
aa010175 is on a distinguished road
Engine missing real bad now! Ideas need please.
Back ground. 2000 V-6 250,000 miles. Owned for 18 years. Did a head cylinder replacement due to a cracked head. Heads rebuilt, replaced water pump, timing belt and rebuilt fuel injectors. Started engine and ran semi smooth. Tripped a PO172 code (system too rich bank 1). I drove it for 100 with a little a little miss once a while. Today I was in a 15 ride when the missing became very bad and the engine would hardly run. It also had some light back fire when running badly. Towed home. I check the timing belt and verified the aligned timing marks were good. I pulled all spark plugs (new wires and plugs) #4 plug was wet and the other 5 were dry. Ideas please. Thanks Dave
Last edited by aa010175; 12-28-2022 at 12:07 AM.
aa010175 is offline   Reply With QuoteReply With Quote
Old 12-28-2022, 04:57 AM #2
19963.4lsr5 19963.4lsr5 is offline
Elite Member
  
Join Date: Aug 2013
Location: Stouchsburg PA
Posts: 5,319
19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold
19963.4lsr5 19963.4lsr5 is offline
Elite Member
 
Join Date: Aug 2013
Location: Stouchsburg PA
Posts: 5,319
19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold
I would think you found your bad injector.

Do you have any spare injectors?


Sent from my iPhone using Tapatalk
19963.4lsr5 is offline   Reply With QuoteReply With Quote
Old 12-28-2022, 12:24 PM #3
aa010175's Avatar
aa010175 aa010175 is offline
Member
  
Join Date: Nov 2021
Location: San Diego
Posts: 55
Real Name: Dave
aa010175 is on a distinguished road
aa010175 aa010175 is offline
Member
aa010175's Avatar
 
Join Date: Nov 2021
Location: San Diego
Posts: 55
Real Name: Dave
aa010175 is on a distinguished road
[QUOTE=19963.4lsr5;3776629]I would think you found your bad injector.

Do you have any spare injectors?

Yes I have 3 replacement coming. Would it barely run with one bad injector?
aa010175 is offline   Reply With QuoteReply With Quote
Old 12-28-2022, 01:18 PM #4
19963.4lsr5 19963.4lsr5 is offline
Elite Member
  
Join Date: Aug 2013
Location: Stouchsburg PA
Posts: 5,319
19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold
19963.4lsr5 19963.4lsr5 is offline
Elite Member
 
Join Date: Aug 2013
Location: Stouchsburg PA
Posts: 5,319
19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold
Engine missing real bad now! Ideas need please.
[QUOTE=aa010175;3776679]
Quote:
Originally Posted by 19963.4lsr5 View Post
I would think you found your bad injector.

Do you have any spare injectors?

Yes I have 3 replacement coming. Would it barely run with one bad injector?

I’m going to say no. But you may have more than one problem.


Sent from my iPhone using Tapatalk
19963.4lsr5 is offline   Reply With QuoteReply With Quote
Old 12-28-2022, 03:30 PM #5
aa010175's Avatar
aa010175 aa010175 is offline
Member
  
Join Date: Nov 2021
Location: San Diego
Posts: 55
Real Name: Dave
aa010175 is on a distinguished road
aa010175 aa010175 is offline
Member
aa010175's Avatar
 
Join Date: Nov 2021
Location: San Diego
Posts: 55
Real Name: Dave
aa010175 is on a distinguished road
[QUOTE=19963.4lsr5;3776694][QUOTE=aa010175;3776679]


I’m going to say no. But you may have more than one problem.

I just Ohms tested the 6 injectors. They were all about the same at 11.0-12.0. One must be bad because I have been tripping code PO172 with system too rich bank 2. I removed the 6 injectors and blew (lungs) the gas out - as I hot wire them. What other test should I perform on them? Dave
Last edited by aa010175; 12-28-2022 at 04:44 PM.
aa010175 is offline   Reply With QuoteReply With Quote
Old 12-28-2022, 04:42 PM #6
Buckaroo's Avatar
Buckaroo Buckaroo is offline
Member
  
Join Date: Jun 2011
Location: Lewis Center, OH
Posts: 509
Buckaroo will become famous soon enough
Buckaroo Buckaroo is offline
Member
Buckaroo's Avatar
 
Join Date: Jun 2011
Location: Lewis Center, OH
Posts: 509
Buckaroo will become famous soon enough
Quote:
Originally Posted by aa010175 View Post
Back ground. 2000 V-6 250,000 miles. Owned for 18 years. Did a head cylinder replacement due to a cracked head. Heads rebuilt, replaced water pump, timing belt and rebuilt fuel injectors. Started engine and ran semi smooth. Tripped a PO172 code (system too rich bank 1). I drove it for 100 with a little a little miss once a while. Today I was in a 15 ride when the missing became very bad and the engine would hardly run. It also had some light back fire when running badly. Towed home. I check the timing belt and verified the aligned timing marks were good. I pulled all spark plugs (new wires and plugs) #4 plug was wet and the other 5 were dry. Ideas please. Thanks Dave
Is the P0172 the only code you have? Would think maybe you should be seeing a P0304? Wet plug could be too much fuel or no spark. Check your spark plug routing per attached. Look for evidence of arcing on cylinder 4 spark plug boot. You could try disconnecting the wire to the cylinder 4 injector and see if it changes anything. You could swap that cylinder 4 spark plug to a different cylinder and see if the "wet" observation follows it. Make sure the plug to the MAF is secure and do a visual check on the wiring to it. You likely know this but driving with that miss will kill your CAT.
Attached Files
File Type: doc 3rd Gen T4R 3.4L Spark Plug Wire Routing.doc (82.0 KB, 27 views)
__________________
2000 T4R SR5 V6 (Retired) & 2005 T4R Limited V6
2002 & 2017 XLE Camry
2004 Honda Accord
2017 Tundra Limited DC 5.7L TRD 4WD
2024 Honda Pioneer 700-2 Deluxe
Buckaroo is offline   Reply With QuoteReply With Quote
Old 12-28-2022, 05:00 PM #7
aa010175's Avatar
aa010175 aa010175 is offline
Member
  
Join Date: Nov 2021
Location: San Diego
Posts: 55
Real Name: Dave
aa010175 is on a distinguished road
aa010175 aa010175 is offline
Member
aa010175's Avatar
 
Join Date: Nov 2021
Location: San Diego
Posts: 55
Real Name: Dave
aa010175 is on a distinguished road
Quote:
Originally Posted by Buckaroo View Post
Is the P0172 the only code you have? Would think maybe you should be seeing a P0304? Wet plug could be too much fuel or no spark. Check your spark plug routing per attached. Look for evidence of arcing on cylinder 4 spark plug boot. You could try disconnecting the wire to the cylinder 4 injector and see if it changes anything. You could swap that cylinder 4 spark plug to a different cylinder and see if the "wet" observation follows it. Make sure the plug to the MAF is secure and do a visual check on the wiring to it. You likely know this but driving with that miss will kill your CAT.
I had to have the car towed to my house it was running so bad. I have been driving it for 100 miles with no problem. Down the freeway 70 mph, short trip to the store etc. the only code was the P0172 with rich note. It was running good then all of the sudden it went to very ruff like 3 cylinders and it was back firing every few minutes. I just pulled all injectors and blew gas out of them well hot wiring the ejectors. Plug wires are correct. Thanks for the diagram. The plugs and wire are new 4 months ago.
aa010175 is offline   Reply With QuoteReply With Quote
Old 12-28-2022, 05:06 PM #8
spartacus's Avatar
spartacus spartacus is offline
Senior Member
  
Join Date: Mar 2010
Location: denver
Posts: 3,010
spartacus has much to be proud of spartacus has much to be proud of spartacus has much to be proud of spartacus has much to be proud of spartacus has much to be proud of spartacus has much to be proud of spartacus has much to be proud of spartacus has much to be proud of spartacus has much to be proud of
spartacus spartacus is offline
Senior Member
spartacus's Avatar
 
Join Date: Mar 2010
Location: denver
Posts: 3,010
spartacus has much to be proud of spartacus has much to be proud of spartacus has much to be proud of spartacus has much to be proud of spartacus has much to be proud of spartacus has much to be proud of spartacus has much to be proud of spartacus has much to be proud of spartacus has much to be proud of
This might not be your issue but wouldn't hurt to check the maf sensor.
spartacus is offline   Reply With QuoteReply With Quote
Old 12-28-2022, 05:11 PM #9
Buckaroo's Avatar
Buckaroo Buckaroo is offline
Member
  
Join Date: Jun 2011
Location: Lewis Center, OH
Posts: 509
Buckaroo will become famous soon enough
Buckaroo Buckaroo is offline
Member
Buckaroo's Avatar
 
Join Date: Jun 2011
Location: Lewis Center, OH
Posts: 509
Buckaroo will become famous soon enough
Quote:
Originally Posted by aa010175 View Post
I had to have the car towed to my house it was running so bad. I have been driving it for 100 miles with no problem. Down the freeway 70 mph, short trip to the store etc. the only code was the P0172 with rich note. It was running good then all of the sudden it went to very ruff like 3 cylinders and it was back firing every few minutes. I just pulled all injectors and blew gas out of them well hot wiring the ejectors. Plug wires are correct. Thanks for the diagram. The plugs and wire are new 4 months ago.
No misfire codes but obvious misfire.....maybe visually check your wiring to injector #4. possibly pinched and grounding out? Have you ever replaced/cleaned your Idle Air Control valve? have you looked at your fuel trims?
__________________
2000 T4R SR5 V6 (Retired) & 2005 T4R Limited V6
2002 & 2017 XLE Camry
2004 Honda Accord
2017 Tundra Limited DC 5.7L TRD 4WD
2024 Honda Pioneer 700-2 Deluxe
Buckaroo is offline   Reply With QuoteReply With Quote
Old 12-28-2022, 05:17 PM #10
Buckaroo's Avatar
Buckaroo Buckaroo is offline
Member
  
Join Date: Jun 2011
Location: Lewis Center, OH
Posts: 509
Buckaroo will become famous soon enough
Buckaroo Buckaroo is offline
Member
Buckaroo's Avatar
 
Join Date: Jun 2011
Location: Lewis Center, OH
Posts: 509
Buckaroo will become famous soon enough
Quote:
Originally Posted by spartacus View Post
This might not be your issue but wouldn't hurt to check the maf sensor.
Good thing to do. Dirty MAF generally associated with P0171 (lean) as is leaking vacuum hose. Maybe clean it. Does seem like we are looking for something not cylinder specific if you had multiple cylinder misfires...but no codes? Do a visual on air filter as well.
__________________
2000 T4R SR5 V6 (Retired) & 2005 T4R Limited V6
2002 & 2017 XLE Camry
2004 Honda Accord
2017 Tundra Limited DC 5.7L TRD 4WD
2024 Honda Pioneer 700-2 Deluxe
Last edited by Buckaroo; 12-28-2022 at 05:39 PM.
Buckaroo is offline   Reply With QuoteReply With Quote
Old 12-28-2022, 06:35 PM #11
aa010175's Avatar
aa010175 aa010175 is offline
Member
  
Join Date: Nov 2021
Location: San Diego
Posts: 55
Real Name: Dave
aa010175 is on a distinguished road
aa010175 aa010175 is offline
Member
aa010175's Avatar
 
Join Date: Nov 2021
Location: San Diego
Posts: 55
Real Name: Dave
aa010175 is on a distinguished road
Quote:
Originally Posted by Buckaroo View Post
Good thing to do. Dirty MAF generally associated with P0171 (lean) as is leaking vacuum hose. Maybe clean it. Does seem like we are looking for something not cylinder specific if you had multiple cylinder misfires...but no codes? Do a visual on air filter as well.

Just cleaned the MAF, throttle valve and cleaned the Idle Air Control valve. Replacement injectors will not be here till 1/3. I don’t see anything wrong with the ones I have. OHms testing in and out of car shows 11.0 in all. The hot wire test worked. Not only herd the cylinder work and was able to blow gas out of all 6 of them. I am finding no smoking gun! Examine the wiring and see nothing wrong with that. All the connections were good. I feel like I should just put it back together and go from there. Ideas on that?
aa010175 is offline   Reply With QuoteReply With Quote
Old 12-28-2022, 08:38 PM #12
snydmax's Avatar
snydmax snydmax is offline
Member
  
Join Date: Jun 2019
Location: NWA
Posts: 270
Real Name: Matt
snydmax will become famous soon enough
snydmax snydmax is offline
Member
snydmax's Avatar
 
Join Date: Jun 2019
Location: NWA
Posts: 270
Real Name: Matt
snydmax will become famous soon enough
Check coil packs? My experience is that it can take a hot minute or two for misfire code to set


Sent from my iPhone using Tapatalk
__________________
'98 4WD Limited, Warm Grey, 172k, Factory E-Locker, Ride-Rites, 265/75-16 Wildpeak AT3s
snydmax is offline   Reply With QuoteReply With Quote
Old 12-28-2022, 09:00 PM #13
aa010175's Avatar
aa010175 aa010175 is offline
Member
  
Join Date: Nov 2021
Location: San Diego
Posts: 55
Real Name: Dave
aa010175 is on a distinguished road
aa010175 aa010175 is offline
Member
aa010175's Avatar
 
Join Date: Nov 2021
Location: San Diego
Posts: 55
Real Name: Dave
aa010175 is on a distinguished road
I put the car all back together after finding nothing wrong that I can see. The car started up and ran normally. But before I started the engine I looked at the codes again that was tripped. It had a PO300 random multiple cylinder misfire detected and a P0303 cylinder 3 misfire detected and a PO304 cylinder 4 misfired detected. After driving it 2 miles PO172 system to Rich bank one showed up again but nothing else. What would make cylinders 3 and 4 misfire and could a misfire trip a P0172 code? Thanks Dave
aa010175 is offline   Reply With QuoteReply With Quote
Old 12-28-2022, 09:20 PM #14
Buckaroo's Avatar
Buckaroo Buckaroo is offline
Member
  
Join Date: Jun 2011
Location: Lewis Center, OH
Posts: 509
Buckaroo will become famous soon enough
Buckaroo Buckaroo is offline
Member
Buckaroo's Avatar
 
Join Date: Jun 2011
Location: Lewis Center, OH
Posts: 509
Buckaroo will become famous soon enough
Quote:
Originally Posted by aa010175 View Post
I put the car all back together after finding nothing wrong that I can see. The car started up and ran normally. But before I started the engine I looked at the codes again that was tripped. It had a PO300 random multiple cylinder misfire detected and a P0303 cylinder 3 misfire detected and a PO304 cylinder 4 misfired detected. After driving it 2 miles PO172 system to Rich bank one showed up again but nothing else. What would make cylinders 3 and 4 misfire and could a misfire trip a P0172 code? Thanks Dave
Cylinders 3 & 4 are not on the same coil pack so that is not the explanation. Maybe it isn't just 3 & 4 - need to think of things that would affect all cylinders. Restriction in air could make it run rich - did you check the air filter and make sure no obstructions in the ductwork to the throttle body ( think mouse nest)? We have not discussed the upstream O2 sensor - are you sure that is working properly? Is it switching?
__________________
2000 T4R SR5 V6 (Retired) & 2005 T4R Limited V6
2002 & 2017 XLE Camry
2004 Honda Accord
2017 Tundra Limited DC 5.7L TRD 4WD
2024 Honda Pioneer 700-2 Deluxe
Buckaroo is offline   Reply With QuoteReply With Quote
Old 12-28-2022, 10:34 PM #15
aa010175's Avatar
aa010175 aa010175 is offline
Member
  
Join Date: Nov 2021
Location: San Diego
Posts: 55
Real Name: Dave
aa010175 is on a distinguished road
aa010175 aa010175 is offline
Member
aa010175's Avatar
 
Join Date: Nov 2021
Location: San Diego
Posts: 55
Real Name: Dave
aa010175 is on a distinguished road
I had removed the air cleaner. It’s now reinstalled. I drive the car daily so no mouse. Did have one in my 62 Cadillac but that’s a different story. It’s the engine all of the suddenly started missing real bad that bothers me. Finding nothing wrong makes it so that I can’t really trust the car now. I just wanted to find something that was wrong so I know that’s it. I will look at the O2 sensors. Thanks for all the advice I received from everyone.
aa010175 is offline   Reply With QuoteReply With Quote
Reply
Page 1 of 2 1 2

Tags
belt , engine , missing , rebuilt , timing

« Previous Thread | Next Thread »

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Techstream Real time Engine Data Woes Tj900 5th gen T4Rs 6 01-31-2021 12:44 PM
Engine missing razerface 3rd gen T4Rs 24 01-05-2017 05:52 PM
Autozone proformance engine real? johnathandm 3rd gen T4Rs 5 04-09-2011 05:33 AM
Need help with missing engine iwilli1169 3rd gen T4Rs 1 01-22-2008 10:03 PM
Engine a real slouch 91runner Maintenance/Detailing 4 03-27-2004 03:05 PM

» Follow Us!!!
» Log in
User Name:

Password:

Not a member yet?
Register Now!
Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 07:18 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.
Feedback Buttons provided by Advanced Post Thanks / Like (Lite) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.
***This site is an unofficial Toyota site, and is not officially endorsed, supported, authorized by or affiliated with Toyota. All company, product, or service names references in this web site are used for identification purposes only and may be trademarks of their respective owners. The Toyota name, marks, designs and logos, as well as Toyota model names, are registered trademarks of Toyota Motor Corporation***Ad Management plugin by RedTyger
 
Toyota - 4Runner . org Forum Terms and Privacy Policy
Copyright © 2020