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Toyota Tacoma Engine Questions

88 messages,  Last post on Apr 25, 2013 at 10:23 AM

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Messages Page 7 of 10

#55 of 88 Re: Tacoma running rough [leleu] by xuneh

Jul 27, 2008 (6:31 pm)

Replying to: leleu (Jun 26, 2008 10:03 am)
I know it's a little late, but I just found this forum while looking for an answer to my own problem. (random missfire) Anyways, I went though the same thing about a year ago. You've got a stuck valve in your #2 cyl..
Have fun pulling the head, then take it to machine shop and have them do a valve job.
If you do find this to be the problem let me know, it could be a problem with the head casting, something that Toyota might be willing to adress. Anyone else with this problem (#2 Cyl. only) please let me know.
2000 Tacoma 2.4 312k and still going strong.

#56 of 88 2002 Tacoma wont start by kwh572

Aug 04, 2008 (8:31 pm)

I have trouble getting my truck to start when the weather is hot (above 90) and when I add gas to it. I put a scanner on it and the code came up as "po441" which is something about the EVAP system purge flow fault. Any other time it starts right up. Even when I do have trouble starting it, it will run fine after it gets going. Looking for solutions.

#57 of 88 2006 tacoma high idle by plyons

Sep 22, 2008 (6:52 am)

When I first start the engine in am. the idle races to 2000 rpms before settling down to 1000 (which seems normal)) I have had it in for service to no avail. It just does it after sitting for 6 hours or more--any advice???

#58 of 88 Re: 3.0 starts for about 15 seconds and dies [nutsonwheels] by daniel37

Oct 10, 2008 (9:31 am)

Replying to: nutsonwheels (Feb 16, 2008 1:49 pm)
I just rebuilt my 2.7 liter toyota tacoma 4x4 motor and my truck dies every time I turn it on and let it idle. If i turn it on and drive it right away it does't die at all it runs fine. My responce is... is this whats happening to your truck cause i cant figure out why mine is doing this i replaced the crank positon censor replaced my computer and still dies. have you tried doind that?

#59 of 88 2007 tacoma engine tick by troy18

Oct 18, 2008 (11:24 am)

i have read many !!! posts about this drivers side engine tick not one has the answer to what it is does anyone know what is making the noise

#60 of 88 98- engine codes by kiddvegas

Oct 29, 2008 (2:39 pm)

i have 98 4cyl tacoma, check eng light just came on, running very rough, has new plugs,wires,air filter....do i have to take it to a dealer to read the check eng codes or can i do that at home to make cheaper repairs myself...

#61 of 88 Re: 2006 tacoma high idle [plyons] by 1knight

Nov 29, 2008 (11:39 am)

Replying to: plyons (Sep 22, 2008 6:52 am)
I also have a 2006 tacoma 2.7L manual shift that does the same thing on cold starts, it revs up to about 2500 rpms for about 20 seconds before idling down.
my truck also revs up to about 2500---3000 rpms when shifting from 4th to 5th gear for about 5---8 seconds before idling back down, I think it is a vacum problem but I have not yet figured out how to correct the problem do you also have this issue?

#62 of 88 Re: Tacoma running rough [xuneh] by markusssss

Mar 26, 2009 (4:22 pm)

Replying to: xuneh (Jul 27, 2008 6:31 pm)
I have the same problem exactly #2 80 psi #1,3,4 150 psi intermitant I did a dry and wet staied about the same except once read 150 on # 2 because i think the valve shut once but remaind stuck 4 most of the time ...Did You find out if it was indeed a factory recall???? well thanks for the posts for all of us that just need help...

#63 of 88 1998 Toyota Tacoma: troubleshoot stumbling by myrpm

May 04, 2010 (10:52 am)

#64 of 88 1998 Toyota Tacoma: troubleshoot stumbling by myrpm

May 04, 2010 (10:52 am)

I've a '98 tacoma 4x4 extended cab (4 cylinder) that has been stumbling while driving down the road. After a while, the Check Engine Light indicates EGR excess flow error code. Occassionally, the light goes back off, but the stumbling continues. The exhaust manifold has been replaced a while back (it was cracked) but other than that, only routine maintenance has kept it in the shop. I've taken it to 2 Toyota dealerships and both have said it checks out fine (no problems) on their diagnostic systems and they could replace the EGR valve to correct the issue with the Check Engine Light. Other than that, their only alternative is to start replacing parts. I had the EGR valve by-passed by a local mechanic and he stated it would stop stumbling if it were the EGR valve, but driving it with the EGR disabled, it still stumbled. I've attempted to test the harnesses from the EGR to the ECM and my basic tests with a multimeter suggests they are fine. I've no where to turn and am not a mechanic. Any suggestions would be greatly appreciated.
 
Other thoughts:
 
  • When it "stumbles" its very significant almost like it completely loses engine power for a split second.
    It stumbles at constant speeds, at acceleration/deceleration.
  • If using Cruise Control (CC), when it stumbles CC will speed you up 4-5 mph faster for a period of 30+ seconds.
  • Spark Plugs and Wires were changed and rechanged using aftermarket and factory wires.
  • Check engine light stays on a majority of the time and occassionally turns off.
  • Stumbling occurs several times with each trip.
  • Highway miles mostly (have 1/4 mile long dirt driveway).
  • Stumbling occurs whether engine is cold or been running for a while (makes no difference).
  • Outside temperature seems to have no effect (18-98 degrees winter/summer in GA).
  • Have ran it a couple of times with 98 octane and fuel enhancement formula and no change in results.
  • I typically run it with 87 grade fuel.
  • Initially the stumbling was faint and seldom, but has eventually become more common and pronounced.
  • This has been going on for 2 years or longer.
     
    Is there any steps I can take to further diagnose this vehicle?

    • Messages Page 7 of 10

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